Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Features ▪ Compliant to RoHS II EU “Directive 2011/65/EU” ▪ Compliant to RoHS EU Directive 2011/65/EU under exemption 7b (Lead solder exemption). Exemption 7b will expire after June 1, 2016 at which time this produc twill no longer be RoHS compliant (non-Z versions) ▪ Compliant to IPC-9592 (September 2008), Category 2, ClassII ▪ Compatible in a Pb-free or SnPb reflow environment (Z versions) ▪ Wide Input voltage range (4.5Vdc-14.4Vdc) ▪ Output voltage programmable from 0.6Vdc to 2.0Vdc via external resistor. Digitally adjustable down to 0.45Vdc TM # ▪ Digital interface through the PMBus protocol RoHS Compliant TM ▪ Tunable Loop to optimize dynamic output voltage response Applications ▪ Power Good signal • Industrial equipment ▪ Fixed switching frequency with capability of external • Distributed power architectures synchronization ▪ Output overcurrent protection (non-latching) • Intermediate bus voltage applications ▪ Over temperature protection • Telecommunications equipment ▪ Remote On/Off • Servers and storage applications ▪ Ability to sink and source current • Networking equipment ▪ Cost efficient open frame design ▪ Small size: 33.02 mm x 13.46 mm x 10.9 mm Vin+ Vout+ (1.3 in x 0.53 in x 0.429 in) VIN VOUT VS+ PGOOD ▪ Wide operating temperature range [-40°C to 105°C RTUNE MODULE (Ruggedized: -D), 85°C(Regular). SEQ CTUNE ▪ Ruggedized (-D) version able to withstand high levels of CLK Cin TRIM Co shock and vibration DATA ADDR0 SMBALRT# RTrim nd † ▪ UL* 60950-1 2 Ed. Recognized, CSA C22.2 No. 60950-1- ADDR1 ‡ nd 07 Certified, and VDE (EN60950-1 2 Ed.) Licensed ON/OFF RADDR0 RADDR1 SHARE SIG_GND ▪ ISO** 9001 and ISO 14001 certified manufacturing facilities SYNC GND VS- GND Description TM The 40A Digital Mega DLynx power modules are non-isolated dc-dc converters that can deliver up to 40A of output current. These modules operate over a wide range of input voltage (VIN = 4.5Vdc-14.4Vdc) and provide a precisely regulated output voltage from 0.45Vdc to 2.0Vdc, programmable via an external resistor and PMBus control. Features include a digital interface using the PMBus protocol, remote On/Off, adjustable output voltage, over current and over temperature protection. The PMBus interface TM supports a range of commands to both control and monitor the module. The module also includes the Tunable Loop feature that allows the user to optimize the dynamic response of the converter to match the load with reduced amount of output capacitance leading to savings on cost and PWB area. * UL is a registered trademark of Underwriters Laboratories, Inc. † CSA is a registered trademark of Canadian Standards Association. ‡ VDE is a trademark of Verband Deutscher Elektrotechniker e.V. ** ISO is a registered trademark of the International Organization of Standards # The PMBus name and logo are registered trademarks of the System Management Interface Forum (SMIF) September 7, 2017 ©2016 General Electric Company. All rights reserved. Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Absolute Maximum Ratings Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect the device reliability. Parameter Device Symbol Min Max Unit Input Voltage All VIN -0.3 15 V Continuous SEQ, SYNC, VS+ All 7 V CLK, DATA, SMBALERT# All 3.6 V Operating Ambient Temperature All T -40 105 °C A (see Thermal Considerations section) Storage Temperature All Tstg -55 125 °C Electrical Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. Parameter Device Symbol Min Typ Max Unit Operating Input Voltage All VIN 4.5  14.4 Vdc Maximum Input Current All IIN,max 24 Adc (VIN=4.5V to 14V, IO=IO, max ) VO,set = 0.6 Vdc IIN,No load 54.7 mA Input No Load Current (VIN = 12Vdc, IO = 0, module enabled) V = 2Vdc I 104 mA O,set IN,No load Input Stand-by Current All I 12.5 mA IN,stand-by (VIN = 12Vdc, module disabled) 2 2 Inrush Transient All I t 1 A s Input Reflected Ripple Current, peak-to-peak (5Hz to 20MHz, 1μH source impedance; V =0 to 14V I = All 90 mAp-p IN , O IOmax ; See Test Configurations) Input Ripple Rejection (120Hz) All -60 dB September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 2 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Electrical Specifications (continued) Parameter Device Symbol Min Typ Max Unit Output Voltage Set-point (with 0.1% tolerance for external All VO, set -1.0 +1.0 % VO, set resistor used to set output voltage) Output Voltage (Over all operating input voltage, resistive All V -3.0 +3.0 % V O, set  O, set load, and temperature conditions until end of life) Adjustment Range (selected by an external resistor) (Some output voltages may not be possible depending on All V 0.6 2.0 Vdc O the input voltage – see Feature Descriptions Section) PMBus Adjustable Output Voltage Range All V ,adj -25 0 +25 %V O O,set PMBus Output Voltage Adjustment Step Size All 0.4 %V O,set Remote Sense Range All 0.5 Vdc Output Regulation Line (VIN=VIN, min to VIN, max) All  6 mV Load (I =I to I ) All  10 mV O O, min O, max Temperature (T =T to T ) All 0.4 % V ref A, min A, max O, set Output Ripple and Noise on nominal output (VIN=VIN, nom and IO=IO, min to IO, max Co = 0.1μF // 22 μF ceramic capacitors) Peak-to-Peak (5Hz to 20MHz bandwidth) All  50 100 mVpk-pk RMS (5Hz to 20MHz bandwidth) All 20 38 mVrms 1 External Capacitance TM Without the Tunable Loop ESR ≥ 1 mΩ All CO, max 6x47  6x47 μF TM With the Tunable Loop ESR ≥ 0.15 mΩ All C 6x47 7000 μF O, max  ESR ≥ 10 mΩ All C 6x47 8500 μF O, max  Output Current (in either sink or source mode) All Io 0 40 Adc Output Current Limit Inception (Hiccup Mode) All IO, lim 150 180 % Io,max (current limit does not operate in sink mode) Output Short-Circuit Current All IO, s/c 2.1 2.83 Arms (V ≤250mV) ( Hiccup Mode ) O Efficiency VO,set = 0.6Vdc η 78.0 81.3 % V = 12Vdc, T =25°C V = 1.2Vdc η 84.0 88.5 % IN A O, set I =I V = V V = 1.8Vdc η 85.25 91.5 % O O, max , O O,set O,set Switching Frequency All f 380 400 420 kHz sw Frequency Synchronization All Synchronization Frequency Range All 350 480 kHz High-Level Input Voltage All VIH 2.0 V Low-Level Input Voltage All VIL 0.4 V Input Current, SYNC All ISYNC 100 nA Minimum Pulse Width, SYNC All tSYNC 100 ns Maximum SYNC rise time All tSYNC_SH 100 ns 1 TM External capacitors may require using the new Tunable Loop feature to ensure that the module is stable as well as getting the best transient response. See the TM Tunable Loop section for details. September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 3 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current General Specifications Parameter Device Min Typ Max Unit Calculated MTBF (IO=0.8IO, max, TA=40°C) Telecordia Issue 2 All 6,498,438 Hours Method 1 Case 3 10.53 11.7 12.87 Weight g (oz.) (0.37) (0.41) (0.45) Feature Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See Feature Descriptions for additional information. Parameter Device Symbol Min Typ Max Unit On/Off Signal Interface (VIN=VIN, min to VIN, max ; open collector or equivalent, Signal referenced to GND) Device is with suffix “4” – Positive Logic (See Ordering Information) Logic High (Module ON) Input High Current All IIH  10 µA Input High Voltage All VIH 3.5  VIN,max V Logic Low (Module OFF) Input Low Current All IIL   1 mA Input Low Voltage All VIL -0.3  0.4 V Device Code with no suffix – Negative Logic (See Ordering Information) (On/OFF pin is open collector/drain logic input with external pull-up resistor; signal referenced to GND) Logic High (Module OFF) Input High Current All IIH ― ― 1 mA Input High Voltage All VIH 2 ― VIN, max Vdc Logic Low (Module ON) Input low Current All IIL ― ― 10 μA Input Low Voltage All VIL -0.2 ― 0.4 Vdc Turn-On Delay and Rise Times (V =V , I =I V to within ±1% of steady state) IN IN, nom O O, max , O Case 1: On/Off input is enabled and then input power is applied (delay from instant at which VIN = VIN, min until Vo = All Tdelay 1.0 1.1 1.7 msec 10% of Vo, set) Case 2: Input power is applied for at least one second and then the On/Off input is enabled (delay from instant All Tdelay 600 700 1800 μsec at which Von/Off is enabled until Vo = 10% of Vo, set) Output voltage Rise time (time for Vo to rise from All Trise 1.2 1.5 2.2 msec 10% of Vo, set to 90% of Vo, set) o Output voltage overshoot (T = 25 C A VIN= VIN, min to VIN, max,IO = IO, min to IO, max) 0 1.5 3.0 % VO, set With or without maximum external capacitance September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 4 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Feature Specifications (cont.) Parameter Device Symbol Min Typ Max Units Over Temperature Protection All Tref 123 130 137 °C (See Thermal Considerations section) PMBus Over Temperature Warning Threshold* All T 120 130 140 °C WARN Tracking Accuracy (Power-Up: 0.5V/ms) All VSEQ –Vo 100 mV (Power-Down: 0.5V/ms) All VSEQ –Vo 100 mV (V to V ; I to I VSEQ < Vo) IN, min IN, max O, min O, max Input Undervoltage Lockout Turn-on Threshold All 4.144 4.25 4.407 Vdc Turn-off Threshold All 3.947 3.98 4.163 Vdc Hysteresis All 0.25 0.3 0.35 Vdc PMBus Adjustable Input Under Voltage Lockout All 2.5 14 Vdc Thresholds Resolution of Adjustable Input Under Voltage Threshold All 500 mV PGOOD (Power Good) Signal Interface Open Drain, V  5VDC supply Overvoltage threshold for PGOOD ON All 103 108 113 %VO, set Overvoltage threshold for PGOOD OFF All 105 110 115 %V O, set Undervoltage threshold for PGOOD ON All 87 92 97 %V O, set Undervoltage threshold for PGOOD OFF All 85 90 95 %VO, set Pulldown resistance of PGOOD pin All 50  Sink current capability into PGOOD pin All 5 mA * Over temperature Warning – Warning may not activate before alarm and unit may shutdown before warning. September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 5 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Digital Interface Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See Feature Descriptions for additional information. Parameter Conditions Symbol Min Typ Max Unit PMBus Signal Interface Characteristics Input High Voltage (CLK, DATA) VIH 2.1 3.6 V Input Low Voltage (CLK, DATA) VIL 0.8 V Input high level current (CLK, DATA) IIH -10 10 μA Input low level current (CLK, DATA) IIL -10 10 μA Output Low Voltage (CLK, DATA, SMBALERT#) I =2mA VOL 0.4 V OUT Output high level open drain leakage current (DATA, VOUT=3.6V IOH 0 10 μA SMBALERT#) Pin capacitance CO 0.7 pF PMBus Operating frequency range Slave Mode FPMB 10 400 kHz Receive Mode 0 Data hold time tHD:DAT ns Transmit Mode 300 tSU:DAT Data setup time 250 ns Measurement System Characteristics Read delay time tDLY 153 192 231 μs Output current measurement range IRNG 0 40 A Output current measurement resolution IRES 62.5 mA Output current measurement gain accuracy (at 25°C) I ±5 % ACC Output current measurement offset 0.1 A IOFST V measurement range 0 2.0 V OUT VOUT(rng) V measurement resolution OUT 16.25 mV V OUT(res) V measurement gain accuracy OUT V -2 2 LSB OUT(gain) V measurement offset OUT V -3 3 % OUT(ofst) V measurement accuracy -15 +15 % OUT VOUT(ACC) V measurement range 0 14.4 V IN VIN(rng) V measurement resolution IN VIN(res) 32.5 mV V measurement gain accuracy IN V -2 2 LSB IN(gain) V measurement offset IN V -5.5 1.4 % IN(ofst) VIN measurement accuracy -3 +3 % VIN September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 6 GE Data Sheet TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Characteristic Curves TM o The following figures provide typical characteristics for the 40A Digital Mega DLynx at 0.6Vo and 25 C. 90 45 40 85 Vin=4.5V NC 35 0.5m/s (100LFM) 80 30 1m/s Vin=12V (200LFM) 1.5m/s 25 (300LFM) Vin=14V 75 Standard Part (85 C) 20 2m/s (400LFM) Ruggedized (D) Part (105 C) 70 15 0 10 20 30 40 45 55 65 75 85 95 105 O OUTPUT CURRENT, I (A) AMBIENT TEMPERATURE, T C O A Figure 1. Converter Efficiency versus Output Current. Figure 2. Derating Output Current versus Ambient Temperature and Airflow. TIME, t (1s/div) TIME, t (20s /div) Figure 3. Typical output ripple and noise (C =6x47uF Figure 4. Transient Response to Dynamic Load Change from O ceramic, VIN = 12V, Io = Io,max, ). 50% to 100% at 12Vin, Cout= 12x680uF+6x47uF, CTune=47nF, RTune=180 ohms TIME, t (1ms/div) TIME, t (1ms/div) Figure 5. Typical Start-up Using On/Off Voltage (Io = Io,max). Figure 6. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max). September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 7 OUTPUT VOLTAGE ON/OFF VOLTAGE OUTPUT VOLTAGE EFFICIENCY,  (%) VO (V) (200mV/div) VON/OFF (V) (5V/div) VO (V) (10mV/div) OUTPUT VOLTAGE INPUT VOLTAGE OUTPUT CURRENT, OUTPUT VOLTAGE VO (V) (200mV/div) VIN (V) (5V/div) OUTPUT CURRENT, Io (A) IO (A) (20A/div) VO (V) (20mV/div) GE Data Sheet TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Characteristic Curves TM o The following figures provide typical characteristics for the 40A Digital Mega DLynx at 1.2Vo and 25 C. 95 45 40 90 35 NC 0.5m/s Vin=4.5V 85 30 (100LFM) Vin=12V 1m/s Vin=14.4V (200LFM) 25 80 1.5m/s Standard Part (300LFM) 20 (85 C) 75 Ruggedized (D) 2m/s 15 Part (105 C) (400LFM) 10 70 45 55 65 75 85 95 105 0 10 20 30 40 O OUTPUT CURRENT, I (A) AMBIENT TEMPERATURE, T C O A Figure 7. Converter Efficiency versus Output Current. Figure 8. Derating Output Current versus Ambient Temperature and Airflow. TIME, t (1s/div) TIME, t (20s /div) Figure 9. Typical output ripple and noise (C = 6x47uF Figure 10. Transient Response to Dynamic Load Change from O ceramic, VIN = 12V, Io = Io,max, ). 50% to 100% at 12Vin, Cout= 6x330uF, CTune=12nF & RTune=200 ohms TIME, t (1ms/div) TIME, t (1ms/div) Figure 11. Typical Start-up Using On/Off Voltage (Io = Io,max). Figure 12. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max). September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 8 OUTPUT VOLTAGE ON/OFF VOLTAGE OUTPUT VOLTAGE EFFICIENCY,  (%) VO (V) (500mV/div) VON/OFF (V) (5V/div) VO (V) (10mV/div) OUTPUT VOLTAGE INPUT VOLTAGE OUTPUT CURRENT, OUTPUT VOLTAGE V (V) (500mV/div) V (V) (5V/div) I (A) (20A/div) V (V) (20mV/div) OUTPUT CURRENT, Io (A) O IN O O GE Data Sheet TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Characteristic Curves TM o The following figures provide typical characteristics for the 40A Digital Mega DLynx at 1.8Vo and 25 C. 100 45 Vin=12V 40 95 35 NC 90 30 0.5m/s 1m/s (100LFM) Vin=4.5V 85 (200LFM) Vin=14.4V 25 1.5m/s 20 80 2m/s Standard Part (400LFM) 15 (85 C) Ruggedized (D) 75 10 Part (105 C) 5 70 45 55 65 75 85 95 105 0 10 20 30 40 O OUTPUT CURRENT, I (A) AMBIENT TEMPERATURE, T C O A Figure 13. Converter Efficiency versus Output Current. Figure 14. Derating Output Current versus Ambient Temperature and Airflow. TIME, t (1s/div) TIME, t (20s /div) Figure 15. Typical output ripple and noise (CO=6x47uF Figure 16. Transient Response to Dynamic Load Change from ceramic, VIN = 12V, Io = Io,max, ). 50% to 100% at 12Vin, Cout= 6x330uF, CTune=5.6nF & RTune=220 ohms TIME, t (1ms/div) TIME, t (1ms/div) Figure 17. Typical Start-up Using On/Off Voltage (Io = Io,max). Figure 18. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max). September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 9 OUTPUT VOLTAGE ON/OFF VOLTAGE OUTPUT VOLTAGE EFFICIENCY,  (%) VO (V) (500mV/div) VON/OFF (V) (5V/div) VO (V) (20mV/div) OUTPUT VOLTAGE INPUT VOLTAGE OUTPUT CURRENT, OUTPUT VOLTAGE V (V) (500mV/div) V (V) (5V/div) I (A) (20A/div) V (V) (20mV/div) OUTPUT CURRENT, Io (A) O IN O O Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Design Considerations 40 6x47uF Ext Cap Input Filtering 8x47uF Ext Cap TM The 40A Digital Mega DLynx module should be 30 10x47uF Ext Cap connected to a low ac-impedance source. A highly inductive source can affect the stability of the module. An input capacitance must be placed directly adjacent to the 20 input pin of the module, to minimize input ripple voltage and ensure module stability. To minimize input voltage ripple, ceramic capacitors are 10 recommended at the input of the module. Figure 19 shows the input ripple voltage for various output voltages at 40A of load current with 4x22 µF, 6x22µF or 8x22uF ceramic 0 capacitors and an input of 12V. 0.6 0.8 1 1.2 1.4 1.6 1.8 2 400 Output Voltage(Volts) 4x22uF Ext Cap 350 6x22uF Ext Cap Figure 20. Output ripple voltage for various output 8x22uF Ext Cap 300 voltages with external 6x47 µF, 8x47 µF or 10x47 µF ceramic capacitors at the output (40A load). Input voltage 250 is 12V. Scope Bandwidth limited to 20MHz 200 150 Safety Considerations 100 For safety agency approval the power module must be installed in compliance with the spacing and separation 50 requirements of the end-use safety agency standards, i.e., 0.6 0.8 1 1.2 1.4 1.6 1.8 2 UL 60950-1 2nd, CSA C22.2 No. 60950-1-07, DIN EN 60950- Output Voltage (Volts) 1:2006 + A11 (VDE0805 Teil 1 + A11):2009-11; EN 60950- 1:2006 + A11:2009-03. Figure 19. Input ripple voltage for various output voltages with various external ceramic capacitors at the input (40A load). Input voltage is 12V. Scope For the converter output to be considered meeting the Bandwidth limited to 20MHz requirements of safety extra-low voltage (SELV), the input must meet SELV requirements. The power module has Output Filtering extra-low voltage (ELV) outputs when all inputs are ELV. The These modules are designed for low output ripple voltage input to these units is to be provided with a fast acting fuse and will meet the maximum output ripple specification with with a maximum rating of 30A, 100V (for example, Littlefuse 0.1 µF ceramic and 47 µF ceramic capacitors at the output of 456 series) in the positive input lead. the module. However, additional output filtering may be required by the system designer for a number of reasons. First, there may be a need to further reduce the output ripple and noise of the module. Second, the dynamic response characteristics may need to be customized to a particular load step change. To reduce the output ripple and improve the dynamic response to a step load change, additional capacitance at the output can be used. Low ESR polymer and ceramic capacitors are recommended to improve the dynamic response of the module. Figure 20 provides output ripple information for different external capacitance values at various Vo and a full load current of 40A. For stable operation of the module, limit the capacitance to less than the maximum output capacitance as specified in the electrical specification table. Optimal performance of the TM module can be achieved by using the Tunable Loop feature described later in this data sheet. September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 10 Ripple Voltage (mVpk-pk) Ripple (mVp-p) Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Analog Feature Descriptions MODULE Remote On/Off PWM Enable The module can be turned ON and OFF either by using the VIN+ ON/OFF pin (Analog interface) or through the PMBus interface (Digital). The module can be configured in a number of ways Rpullup through the PMBus interface to react to the two ON/OFF Internal inputs: Pullup I • Module ON/OFF can be controlled only through the analog ON/OFF 470 10K ON/OFF Q3 interface (digital interface ON/OFF commands are ignored) + 22K V ON/OFF • Module ON/OFF can be controlled only through the PMBus Q1 22K interface (analog interface is ignored) 10K • Module ON/OFF can be controlled by either the analog or GND _ digital interface The default state of the module (as shipped from the factory) Figure 22. Circuit configuration for using negative On/Off is to be controlled by the analog interface only. If the digital logic. interface is to be enabled, or the module is to be controlled only through the digital interface, this change must be made through the PMBus. These changes can be made and written Digital On/Off to non-volatile memory on the module so that it is Please see the Digital Feature Descriptions section. remembered for subsequent use. Analog On/Off Monotonic Start-up and Shutdown TM The 40A Digital Mega DLynx power modules feature an The module has monotonic start-up and shutdown behavior On/Off pin for remote On/Off operation. Two On/Off logic for any combination of rated input voltage, output current options are available. In the Positive Logic On/Off option, and operating temperature range. (device code suffix “4” – see Ordering Information), the Startup into Pre-biased Output module turns ON during a logic High on the On/Off pin and turns OFF during a logic Low. With the Negative Logic On/Off The module can start into a prebiased output as long as the option, (no device code suffix, see Ordering Information), the prebias voltage is 0.5V less than the set output voltage. module turns OFF during logic High and ON during logic Low. The On/Off signal should be always referenced to ground. For Analog Output Voltage Programming either On/Off logic option, leaving the On/Off pin The output voltage of the module is programmable to any disconnected will turn the module ON when input voltage is voltage from 0.6dc to 2.0Vdc by connecting a resistor present. between the Trim and SIG_GND pins of the module. Certain For positive logic modules, the circuit configuration for using restrictions apply on the output voltage set point depending the On/Off pin is shown in Figure 21. on the input voltage. These are shown in the Output Voltage vs. Input Voltage Set Point Area plot in Fig. 23. The Upper For negative logic On/Off modules, the circuit configuration is Limit curve shows that for output voltages lower than 1V, shown in Fig. 22.. the input voltage must be lower than the maximum of 14.4V. The Lower Limit curve shows that for output voltages MODULE higher than 0.6V, the input voltage needs to be larger than the minimum of 4.5V. VIN+ PWM Enable Rpullup Internal I CR1 ON/OFF Pullup + 470 10K V ON/OFF ON/OFF Q1 10K GND _ Figure 21. Circuit configuration for using positive On/Off logic. September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 11 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Digital Output Voltage Adjustment Please see the Digital Feature Descriptions section. Remote Sense The power module has a Remote Sense feature to minimize the effects of distribution losses by regulating the voltage between the sense pins (VS+ and VS-). The voltage drop between the sense pins and the VOUT and GND pins of the module should not exceed 0.5V. Analog Voltage Margining Output voltage margining can be implemented in the module by connecting a resistor, R , from the Trim pin margin-up to the ground pin for margining-up the output voltage and Figure 23. Output Voltage vs. Input Voltage Set Point Area by connecting a resistor, R , from the Trim pin to margin-down plot showing limits where the output voltage can be set for output pin for margining-down. Figure 25 shows the circuit different input voltages. configuration for output voltage margining. The POL Programming Tool, available at www.GEpower.com under V (+) V (+) IN O the Downloads section, also calculates the values of R margin- up and Rmargin-down for a specific output voltage and % margin. Please consult your local GE technical VS+ representative for additional details. ON/OFF LOAD TRIM Vo Rmargin-down R trim MODULE SIG_GND Q2 VS─ Trim Rmargin-up Caution – Do not connect SIG_GND to GND elsewhere in the layout Rtrim Figure 24. Circuit configuration for programming output voltage using an external resistor. Q1 Without an external resistor between Trim and SIG_GND pins, SIG_GND the output of the module will be 0.6Vdc.To calculate the value of the trim resistor, Rtrim for a desired output voltage, should be as per the following equation: Figure 25. Circuit Configuration for margining Output voltage.  12  Rtrim  k   Digital Output Voltage Margining  Vo 0.6   Please see the Digital Feature Descriptions section. Rtrim is the external resistor in kΩ Output Voltage Sequencing Vo is the desired output voltage. The power module includes a sequencing feature, EZ- Table 1 provides Rtrim values required for some common SEQUENCE that enables users to implement various types of output voltages. output voltage sequencing in their applications. This is accomplished via an additional sequencing pin. When not Table 1 using the sequencing feature, leave it unconnected. VO, set (V) Rtrim (KΩ) The voltage applied to the SEQ pin should be scaled down 0.6 Open by the same ratio as used to scale the output voltage down 0.9 40 to the reference voltage of the module. This is accomplished 1.0 30 by an external resistive divider connected across the 1.2 20 sequencing voltage before it is fed to the SEQ pin as shown in Fig. 26. In addition, a small capacitor (suggested value 1.5 13.33 100pF) should be connected across the lower resistor R1. 1.8 10 For all DLynx modules, the minimum recommended delay between the ON/OFF signal and the sequencing signal is September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 12 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current 10ms to ensure that the module output is ramped up the load transient is limited to a maximum of 62.5% of according to the sequencing signal. This ensures that the specified full load current. module soft-start routine is completed before the sequencing Digital Adjustable Overcurrent Warning signal is allowed to ramp up. Please see the Digital Feature Descriptions section. DLynx Module Overtemperature Protection V SEQ To provide protection in a fault condition, the unit is equipped with a thermal shutdown circuit. The unit will shut down if the 20K over temperature threshold of 145ºC(typ) is exceeded at the thermal reference point Tref .Once the unit goes into thermal SEQ shutdown it will then wait to cool before attempting to restart. R1=Rtrim Digital Temperature Status via PMBus SIG_GND 100 pF Please see the Digital Feature Descriptions section. Digitally Adjustable Output Over and Under Voltage Figure 26. Circuit showing connection of the sequencing Protection signal to the SEQ pin. Please see the Digital Feature Descriptions section. When the scaled down sequencing voltage is applied to the Input Undervoltage Lockout SEQ pin, the output voltage tracks this voltage until the output reaches the set-point voltage. The final value of the At input voltages below the input undervoltage lockout limit, sequencing voltage must be set higher than the set-point the module operation is disabled. The module will begin to voltage of the module. The output voltage follows the operate at an input voltage above the undervoltage lockout sequencing voltage on a one-to-one basis. By connecting turn-on threshold. multiple modules together, multiple modules can track their output voltages to the voltage applied on the SEQ pin. Digitally Adjustable Input Undervoltage Lockout The module’s output can track the SEQ pin signal with slopes Please see the Digital Feature Descriptions section. of up to 0.5V/msec during power-up or power-down. Digitally Adjustable Power Good Thresholds To initiate simultaneous shutdown of the modules, the SEQ pin voltage is lowered in a controlled manner. The output Please see the Digital Feature Descriptions section. voltage of the modules tracks the voltages below their set- Synchronization point voltages on a one-to-one basis. A valid input voltage must be maintained until the tracking and output voltages The module switching frequency can be synchronized to a reach ground potential. signal with an external frequency within a specified range. Synchronization can be done by using the external signal Note that in all digital DLynx series of modules, the PMBus applied to the SYNC pin of the module as shown in Fig. 27, Output Undervoltage Fault will be tripped when sequencing is with the converter being synchronized by the rising edge of employed. This will be detected using the STATUS_WORD and the external signal. The Electrical Specifications table STATUS_VOUT PMBus commands. In addition, the specifies the requirements of the external SYNC signal. If the SMBALERT# signal will be asserted low as occurs for all faults SYNC pin is not used, the module should free run at the and warnings. To avoid the module shutting down due to the default switching frequency. If synchronization is not being Output Undervoltage Fault, the module must be set to used, connect the SYNC pin to GND. continue operation without interruption as the response to this fault (see the description of the PMBus command VOUT_UV_FAULT_RESPONSE for additional information). MODULE Overcurrent Protection SYNC To provide protection in a fault (output overload) condition, the unit is equipped with internal current-limiting circuitry + and can endure current limiting continuously. At the point of current-limit inception, the unit enters hiccup mode. The unit ─ operates normally once the output current is brought back GND into its specified range. Figure 27. External source connections to synchronize Load Transient Considerations switching frequency of the module. The MDT040 module can achieve 100% load transient above 0ºC ambient temperature. Below 0 ºC ambient temperature, September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 13 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current setup with two modules (A and B) in parallel from 1V to Paralleling with Active Load Sharing (-P Option) 1.1V, module A would be adjusted from 1.0 to 1.02V TM For additional power requirements, the Mega DLynx power followed by module B from 1.0 to 1.02V, then each module is also equipped with paralleling capability. Up to five module in sequence from 1.02 to 1.04V and so on until modules can be configured in parallel, with active load the final output voltage of 1.1V is reached. sharing. • If the Sequencing function is being used to start-up and To implement paralleling, the following conditions must be shut down modules and the module is being held to 0V satisfied. by the tracking signal then there may be small deviations on the module output. This is due to • All modules connected in parallel must be frequency controller duty cycle limitations encountered in trying synchronized where they are switching at the same to hold the voltage down near 0V. frequency. This is done by using the SYNC function of the module and connecting to an external frequency • The share bus is not designed for redundant operation source. Modules can be interleaved to reduce input and the system will be non-functional upon failure of ripple/filtering requirements. one of the units when multiple units are in parallel. In particular, if one of the converters shuts down during • The share pins of all units in parallel must be connected operation, the other converters may also shut down together. The path of these connections should be as due to their outputs hitting current limit. In such a direct as possible. situation, unless a coordinated restart is ensured, the system may never properly restart since different • The remote sense connections to all modules should be converters will try to restart at different times causing made that to same points for the output, i.e. all VS+ and an overload condition and subsequent shutdown. This VS- terminals for all modules are connected to the situation can be avoided by having an external output power bus at the same points. voltage monitor circuit that detects a shutdown • For converters operating in parallel, tunable loop condition and forces all converters to shut down and components “RTUNE” and “CTUNE” must be selected to restart together. meet the required transient specification. For providing When not using the active load share feature, share pins better noise immunity, we recommend that RTUNE value should be left unconnected. to be greater than 300Ω. Measuring Output Current, Output Voltage and Some special considerations apply for design of converters Input Voltage in parallel operation: Please see the Digital Feature Descriptions section. • When sizing the number of modules required for parallel operation, take note of the fact that current Dual Layout sharing has some tolerance. In addition, under Identical dimensions and pin layout of Analog and Digital transient conditions such as a dynamic load change Mega DLynx modules permit migration from one to the and during startup, all converter output currents will other without needing to change the layout. In both cases not be equal. To allow for such variation and avoid the the trim resistor is connected between trim and signal likelihood of a converter shutting off due to a current ground. overload, the total capacity of the paralleled system should be no more than 90% of the sum of the individual converters. As an example, for a system of TM three MegaDLynx converters in parallel, the total current drawn should be less that 90% of (3 x 40A), i.e. less than 108 A. Similarly, four units can support a load less than 144 A. • All modules should be turned ON and OFF together. This is so that all modules come up at the same time avoiding the problem of one converter sourcing current into the other leading to an overcurrent trip condition. To ensure that all modules come up simultaneously, the on/off pins of all paralleled converters should be tied together and the converters enabled and disabled using the on/off pin. Note that this means that converters in parallel cannot be digitally turned ON as that does not ensure that all modules being paralleled turn on at the same time. • If digital trimming is used to adjust the overall output voltage, the adjustments need to be made in a series of small steps to avoid shutting down the output. Each step should be no more than 20mV for each module. For example, to adjust the overall output voltage in a September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 14 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current TM Table 2. General recommended values of of R and Tunable Loop TUNE CTUNE for Vin=12V and various external ceramic capacitor The module has a feature that optimizes transient response combination TM of the module called Tunable Loop . C 6x 8x 10x 12x 20x O 47µF 47µF 47µF 47µF 47µF External capacitors are usually added to the output of the R 330Ω 330Ω 330Ω 330Ω 200Ω TUNE module for two reasons: to reduce output ripple and noise C 330pF 820pF 1200pF 1500pF 3300pF TUNE (see Figure 38) and to reduce output voltage deviations from the steady-state value in the presence of dynamic load current changes. Adding external capacitance however Table 3. Recommended values of RTUNE and CTUNE to obtain affects the voltage control loop of the module, typically transient deviation of 2% of Vout for a 20A step load with causing the loop to slow down with sluggish response. Vin=12V. Larger values of external capacitance could also cause the VO 1.8V 1.2V 0.6V module to become unstable. 4x47uF + 4x47uF + 4x47uF + 6x330µF 11x330µF 12x680µF TM The Tunable Loop allows the user to externally adjust the CO polymer polymer polymer voltage control loop to match the filter network connected to R 220 Ω 200 Ω 180 Ω TUNE TM the output of the module. The Tunable Loop is implemented C TUNE 5600pF 12nF 47nF by connecting a series R-C between the VS+ and TRIM pins of ∆V 34mV 22mV 12mV the module, as shown in Fig. 28. This R-C allows the user to externally adjust the voltage loop feedback compensation of Note: The capacitors used in the Tunable Loop tables are the module. 47 μF/3 mΩ ESR ceramic, 330 μF/12 mΩ ESR polymer capacitor and 680μF/12 mΩ polymer capacitor. VOUT VS+ RTune CO MODULE CTune TRIM RTrim SIG_GND GND Figure. 28. Circuit diagram showing connection of RTUNE and C to tune the control loop of the module. TUNE Recommended values of RTUNE and CTUNE for different output capacitor combinations are given in Table 2. Table 2 shows the recommended values of RTUNE and CTUNE for different values of ceramic output capacitors up to 1000uF that might be needed for an application to meet output ripple and noise requirements. Selecting R and C according to Table 2 TUNE TUNE will ensure stable operation of the module. In applications with tight output voltage limits in the presence of dynamic current loading, additional output capacitance will be required. Table 3 lists recommended values of R TUNE and CTUNE in order to meet 2% output voltage deviation limits for some common output voltages in the presence of a 20A to 40A step change (50% of full load), with an input voltage of 12V. Please contact your GE technical representative to obtain more details of this feature as well as for guidelines on how to select the right value of external R-C to tune the module for best transient performance and stable operation for other output capacitance values. September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 15 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current address resistor value is outside the range specified in Table Digital Feature Descriptions 4, the module will respond to address 127. PMBus Interface Capability Table 4 TM The 40A Digital Mega DLynx power modules have a PMBus Digit Resistor Value (KΩ) interface that supports both communication and control. The 0 10 PMBus Power Management Protocol Specification can be 1 15.4 obtained from www.pmbus.org. The modules support a 2 23.7 subset of version 1.1 of the specification (see Table 6 for a list 3 36.5 of the specific commands supported). Most module parameters can be programmed using PMBus and stored as 4 54.9 defaults for later use. 5 84.5 All communication over the module PMBus interface must 6 130 support the Packet Error Checking (PEC) scheme. The PMBus 7 200 master must generate the correct PEC byte for all transactions, and check the PEC byte returned by the module. 2 The user must know which I C addresses are reserved in a The module also supports the SMBALERT# response protocol system for special functions and set the address of the whereby the module can alert the bus master if it wants to module to avoid interfering with other system operations. talk. For more information on the SMBus alert response Both 100kHz and 400kHz bus speeds are supported by the protocol, see the System Management Bus (SMBus) module. Connection for the PMBus interface should follow specification. the High Power DC specifications given in section 3.1.3 in the SMBus specification V2.0 for the 400kHz bus speed or the The module has non-volatile memory that is used to store Low Power DC specifications in section 3.1.2. The complete configuration settings. Not all settings programmed into the SMBus specification is available from the SMBus web site, device are automatically saved into this non-volatile memory, smbus.org. only those specifically identified as capable of being stored can be saved (see Table 6 for which command parameters can be saved to non-volatile storage). ADDR1 PMBus Data Format ADDR0 For commands that set thresholds, voltages or report such quantities, the module supports the “Linear” data format R R ADDR0 ADDR1 among the three data formats supported by PMBus. The Linear Data Format is a two byte value with an 11-bit, two’s complement mantissa and a 5-bit, two’s complement SIG_GND exponent. The format of the two data bytes is shown below: Data Byte High Data Byte Low Figure 29. Circuit showing connection of resistors used to set the PMBus address of the module. 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 PMBus Enabled On/Off Exponent Mantissa The module can also be turned on and off via the PMBus MSB MSB interface. The OPERATION command is used to actually turn the module on and off via the PMBus, while the ON_OFF_CONFIG command configures the combination of The value is of the number is then given by analog ON/OFF pin input and PMBus commands needed to Exponent Value = Mantissa x 2 turn the module on and off. Bit [7] in the OPERATION command data byte enables the module, with the following PMBus Addressing functions: The power module can be addressed through the PMBus 0 : Output is disabled using a device address. The module has 64 possible 1 : Output is enabled addresses (0 to 63 in decimal) which can be set using resistors connected from the ADDR0 and ADDR1 pins to This module uses the lower five bits of the ON_OFF_CONFIG SIG_GND. Note that some of these addresses (0, 1, 2, 3, 4, 5, 6, data byte to set various ON/OFF options as follows: 7, 8, 9, 10, 11 12, 40, 44, 45, 55 in decimal) are reserved Bit Position 4 3 2 1 0 according to the SMBus specifications and may not be Access r/w r/w r/w r/w r useable. The address is set in the form of two octal (0 to 7) digits, with each pin setting one digit. The ADDR1 pin sets the Function PU CMD CPR POL CPA high order digit and ADDR0 sets the low order digit. The Default Value 1 0 1 1 1 resistor values suggested for each digit are shown in Table 4 (1% tolerance resistors are recommended). Note that if either September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 16 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current PU: Sets the default to either operate any time input power is Output Voltage Adjustment Using the PMBus present or for the ON/OFF to be controlled by the analog ON/OFF input and the PMBus OPERATION command. This bit The VOUT_SCALE_LOOP parameter is important for a number is used together with the CP, CMD and ON bits to determine of PMBus commands related to output voltage trimming, startup. margining, over/under voltage protection and the PGOOD thresholds. The output voltage of the module is set as the Bit Value Action combination of the voltage divider formed by RTrim and a Module powers up any time power is present 20kΩ upper divider resistor inside the module, and the 0 regardless of state of the analog ON/OFF pin internal reference voltage of the module. The reference Module does not power up until commanded voltage VREF is nominally set at 600mV, and the output by the analog ON/OFF pin and the regulation voltage is then given by 1 OPERATION command as programmed in bits [2:0] of the ON_OFF_CONFIG register. 20000 RTrim   V   V OUT REF   RTrim   CMD: The CMD bit controls how the device responds to the OPERATION command. Hence the module output voltage is dependent on the value of RTrim which is connected external to the module. The Bit Value Action information on the output voltage divider ratio is conveyed to Module ignores the ON bit in the OPERATION the module through the VOUT_SCALE_LOOP parameter 0 command which is calculated as follows: Module responds to the ON bit in the 1 OPERATION command RTrim VOUT _ SCALE _ LOOP 20000 RTrim CPR: Sets the response of the analog ON/OFF pin. This bit is The VOUT_SCALE_LOOP parameter is specified using the used together with the CMD, PU and ON bits to determine “Linear” format and two bytes. The upper five bits [7:3] of the startup. high byte are used to set the exponent which is fixed at –9 (decimal). The remaining three bits of the high byte [2:0] and Bit Value Action the eight bits of the lower byte are used for the mantissa. The Module ignores the analog ON/OFF pin, i.e. default value of the mantissa is 00100000000 corresponding 0 ON/OFF is only controlled through the to 256 (decimal), corresponding to a divider ratio of 0.5. The PMBUS via the OPERATION command maximum value of the mantissa is 512 corresponding to a Module requires the analog ON/OFF pin to be 1 divider ratio of 1. Note that the resolution of the asserted to start the unit VOUT_SCALE_LOOP command is 0.2%. When PMBus commands are used to trim or margin the PMBus Adjustable Soft Start Rise Time output voltage, the value of V is what is changed inside the REF The soft start rise time can be adjusted in the module via module, which in turn changes the regulated output voltage PMBus. When setting this parameter, make sure that the of the module. charging current for output capacitors can be delivered by The nominal output voltage of the module can be adjusted the module in addition to any load current to avoid nuisance with a minimum step size of 0.4% over a ±25% range from tripping of the overcurrent protection circuitry during startup. nominal using the VOUT_TRIM command over the PMBus. The TON_RISE command sets the rise time in ms, and allows choosing soft start times between 600μs and 9ms, with The VOUT_TRIM command is used to apply a fixed offset possible values listed in Table 5. Note that the exponent is voltage to the output voltage command value using the fixed at -4 (decimal) and the upper two bits of the mantissa “Linear” mode with the exponent fixed at –10 (decimal). The are also fixed at 0. value of the offset voltage is given by Table 5 10 V  V OUT _ TR IM 2 OUT ( o ffset) Rise Time Exponent Mantissa 600μs 11100 00000001010 This offset voltage is added to the voltage set through the 900μs 11100 00000001110 divider ratio and nominal VREF to produce the trimmed output voltage. The valid range in two’s complement for this 1.2ms 11100 00000010011 command is –4000h to 3fffh. The high order two bits of the 1.8ms 11100 00000011101 high byte must both be either 0 or 1. If a value outside of the 2.7ms 11100 00000101011 +/-25% adjustment range is given with this command, the 4.2ms 11100 00001000011 module will set its output voltage to the nominal value (as if 6.0ms 11100 00001100000 VOUT_TRIM had been set to 0), assert SMBALRT#, set the CML 9.0ms 11100 00010010000 bit in STATUS_BYTE and the invalid data bit in STATUS_CML. September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 17 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current PMBus Adjustable Output Over and Under Voltage Output Voltage Margining Using the PMBus Protection The module can also have its output voltage margined via The module has output over and under voltage protection PMBus commands. The command VOUT_MARGIN_HIGH sets capability. The PMBus command VOUT_OV_FAULT_LIMIT is the margin high voltage, while the command used to set the output over voltage threshold from four VOUT_MARGIN_LOW sets the margin low voltage. Both the possible values: 108%, 110%, 112% or 115% of the VOUT_MARGIN_HIGH and VOUT_MARGIN_LOW commands commanded output voltage. The command use the “Linear” mode with the exponent fixed at –10 VOUT_UV_FAULT_LIMIT sets the threshold that causes an (decimal). Two bytes are used for the mantissa with the upper output under voltage fault and can also be selected from four bit [7] of the high byte fixed at 0. The actual margined output possible values: 92%, 90%, 88% or 85%. The default values voltage is a combination of the VOUT_MARGIN_HIGH or are 112% and 88% of commanded output voltage. Both VOUT_MARGIN_LOW and the VOUT_TRIM values as shown commands use two data bytes formatted as two’s below. complement binary integers. The “Linear” mode is used with V  the exponent fixed to –10 (decimal) and the effective over or OUT ( MH ) under voltage trip points given by: 10 ( VOUT _ MARGIN _ HIGH VOUT _ TRIM ) 2 10 V  ( VOUT _ OV _ FAULT _ LIMIT) 2 OUT ( OV _ REQ ) V  OUT ( ML) 10 V  ( VOUT _ UV _ FAULT _ LIMIT) 2 10 OUT (UV _ REQ ) ( VOUT _ MARGIN _ LOW VOUT _ TRIM ) 2 Values within the supported range for over and undervoltage Note that the sum of the margin and trim voltages cannot be detection thresholds will be set to the nearest fixed outside the ±25% window around the nominal output percentage. Note that the correct value for voltage. The data associated with VOUT_MARGIN_HIGH and VOUT_SCALE_LOOP must be set in the module for the correct VOUT_MARGIN_LOW can be stored to non-volatile memory over or under voltage trip points to be calculated. using the STORE_DEFAULT_ALL command. In addition to adjustable output voltage protection, the 40A The module is commanded to go to the margined high or low TM Digital Mega DLynx module can also be programmed for voltages using the OPERATION command. Bits [5:2] are used the response to the fault. The VOUT_OV_FAULT RESPONSE to enable margining as follows: and VOUT_UV_FAULT_RESPONSE commands specify the response to the fault. Both these commands use a single 00XX : Margin Off data byte with the possible options as shown below. 0101 : Margin Low (Ignore Fault) 0110 : Margin Low (Act on Fault) 1. Continue operation without interruption (Bits [7:6] 1001 : Margin High (Ignore Fault) = 00, Bits [5:3] = xxx) 1010 : Margin High (Act on Fault) 2. Continue for four switching cycles and then shut down if the fault is still present, followed by no PMBus Adjustable Overcurrent Warning restart or continuous restart (Bits [7:6] = 01, Bits The module can provide an overcurrent warning via the [5:3] = 000 means no restart, Bits [5:3] = 111 PMBus. The threshold for the overcurrent warning can be set means continuous restart) using the parameter IOUT_OC_WARN_LIMIT. This command 3. Immediate shut down followed by no restart or uses the “Linear” data format with a two byte data word continuous restart (Bits [7:6] = 10, Bits [5:3] = 000 where the upper five bits [7:3] of the high byte represent the means no restart, Bits [5:3] = 111 means exponent and the remaining three bits of the high byte [2:0] continuous restart). and the eight bits in the low byte represent the mantissa. The 4. Module output is disabled when the fault is present exponent is fixed at –1 (decimal). The upper five bits of the and the output is enabled when the fault no longer mantissa are fixed at 0 while the lower six bits are exists (Bits [7:6] = 11, Bits [5:3] = xxx). programmable with a default value of 55.5A (decimal). For Note that separate response choices are possible for output production codes after April 2013, the value for over voltage or under voltage faults. IOUT_OC_WARN_LIMIT will be fixed at 57A. For earlier PMBus Adjustable Input Undervoltage Lockout production codes the actual value for IOUT_OC_WARN_LIMIT will vary from module to module due to calibration during The module allows adjustment of the input under voltage production testing. The resolution of this warning limit is lockout and hysteresis. The command VIN_ON allows setting 500mA. The value of the IOUT_OC_WARN_LIMIT can be the input voltage turn on threshold, while the VIN_OFF stored to non-volatile memory using the command sets the input voltage turn off threshold. For the STORE_DEFAULT_ALL command. VIN_ON command, possible values are 3.5 to 14V in 0.5V steps. For the VIN_OFF command, possible values are 3V to Temperature Status via PMBus 14V in 0.5V steps. If other values are entered for either The module can provide information related to temperature command, they will be mapped to the closest of the allowed of the module through the STATUS_TEMPERATURE command. values. The command returns information about whether the pre-set over temperature fault threshold and/or the warning Both the VIN_ON and VIN_OFF commands use the “Linear” threshold have been exceeded. format with two data bytes. The upper five bits represent the exponent (fixed at -2) and the remaining 11 bits represent September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 18 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current the mantissa. For the mantissa, the four most significant bits resistance is then the current gain factor used to scale the are fixed at 0. measured voltage into a current reading. This gain factor is the argument of the IOUT_CAL_GAIN command, and consists Power Good of two bytes in the linear data format. The exponent uses the upper five bits [7:3] of the high data byte in two-s The module provides a Power Good (PGOOD) signal that is complement format and is fixed at –15 (decimal). The implemented with an open-drain output to indicate that the remaining 11 bits in two’s complement binary format output voltage is within the regulation limits of the power represent the mantissa. During manufacture, each module is module. The PGOOD signal will be de-asserted to a low state calibrated by measuring and storing the current gain factor if any condition such as overtemperature, overcurrent or loss into non-volatile storage. of regulation occurs that would result in the output voltage going outside the specified thresholds. The PGOOD thresholds The current measurement accuracy is also improved by each are user selectable via the PMBus (the default values are as module being calibrated during manufacture with the offset shown in the Feature Specifications Section). Each threshold in the current reading. The IOUT_CAL_OFFSET command is is set up symmetrically above and below the nominal value. used to store and read the current offset. The argument for The POWER_GOOD_ON command sets the output voltage this command consists of two bytes composed of a 5-bit level above which PGOOD is asserted (lower threshold). For exponent (fixed at -4d) and a 11-bit mantissa. This command example, with a 1.2V nominal output voltage, the has a resolution of 62.5mA and a range of -4000mA to POWER_GOOD_ON threshold can set the lower threshold to +3937.5mA. 1.14 or 1.1V. Doing this will automatically set the upper thresholds to 1.26 or 1.3V. The READ_IOUT command provides module average output The POWER_GOOD_OFF command sets the level below which current information. This command only supports positive or the PGOOD command is de-asserted. This command also current sourced from the module. If the converter is sinking sets two thresholds symmetrically placed around the nominal current a reading of 0 is provided. The READ_IOUT command output voltage. Normally, the POWER_GOOD_ON threshold is returns two bytes of data in the linear data format. The set higher than the POWER_GOOD_OFF threshold. exponent uses the upper five bits [7:3] of the high data byte in two-s complement format and is fixed at –4 (decimal). The Both POWER_GOOD_ON and POWER_GOOD_OFF commands remaining 11 bits in two’s complement binary format use the “Linear” format with the exponent fixed at –10 th represent the mantissa with the 11 bit fixed at 0 since only (decimal). The two thresholds are given by positive numbers are considered valid. 10 V  ( POWER _ GOOD_ ON) 2 OUT ( PGOOD _ ON ) Note that the current reading provided by the module is not 10 corrected for temperature. The temperature corrected V  ( POWER _ GOOD_ OFF) 2 OUT ( PGOOD _ OFF ) current reading for module temperature TModule can be Both commands use two data bytes with bit [7] of the high estimated using the following equation byte fixed at 0, while the remaining bits are r/w and used to set the mantissa using two’s complement representation. 𝑰 𝑹𝑬𝑨𝑫_𝑶𝑼𝑻 Both commands also use the VOUT_SCALE_LOOP parameter 𝑰 = 𝑶𝑼𝑻,𝑪𝑶𝑹𝑹 𝟏+[(𝑻 −𝟑𝟎)×𝟎.𝟎𝟎𝟑𝟗𝟑] so it must be set correctly. The default value of 𝑰𝑵𝑫 POWER_GOOD_ON is set at 1.1035V and that of the where IOUT_CORR is the temperature corrected value of the POWER_GOOD_OFF is set at 1.08V. The values associated current measurement, IREAD_OUT is the module current with these commands can be stored in non-volatile memory measurement value, TIND is the temperature of the inductor using the STORE_DEFAULT_ALL command. winding on the module. Since it may be difficult to measure The PGOOD terminal can be connected through a pullup T , it may be approximated by an estimate of the module IND resistor (suggested value 100K) to a source of 5VDC or temperature. lower. Measuring Output Voltage Using the PMBus Measurement of Output Current, Output Voltage and Input Voltage The module can provide output voltage information using the READ_VOUT command. The command returns two bytes of The module is capable of measuring key module parameters data all representing the mantissa while the exponent is fixed such as output current and voltage and input voltage and at -10 (decimal). providing this information through the PMBus interface. Roughly every 200μs, the module makes 16 measurements During manufacture of the module, offset and gain correction each of output current, voltage and input voltage. Average values are written into the non-volatile memory of the values of these 16 measurements are then calculated and module. The command VOUT_CAL_OFFSET can be used to placed in the appropriate registers. The values in the registers read and/or write the offset (two bytes consisting of a 16-bit can then be read using the PMBus interface. mantissa in two’s complement format) while the exponent is always fixed at -10 (decimal). The allowed range for this offset Measuring Output Current Using the PMBus correction is -125 to 124mV. The command VOUT_CAL_GAIN The module measures current by using the inductor winding can be used to read and/or write the gain correction - two resistance as a current sense element. The inductor winding bytes consisting of a five-bit exponent (fixed at -8) and a 11- September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 19 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current bit mantissa. The range of this correction factor is -0.125V to STATUS_WORD: Returns two bytes of information with a +0.121V, with a resolution of 0.004V. The corrected output summary of the module’s fault/warning conditions. voltage reading is then given by: Low Byte V ( Final) OUT Default Bit Position Flag Value [ V ( Initial ) (1 VOUT _ CAL _ GAIN)] OUT 7 X 0  VOUT _ CAL _ OFFSET 6 OFF 0 5 VOUT Overvoltage 0 Measuring Input Voltage Using the PMBus 4 IOUT Overcurrent 0 3 VIN Undervoltage 0 The module can provide input voltage information using the 2 Temperature 0 READ_VIN command. The command returns two bytes of 1 CML (Comm. Memory Fault) 0 data in the linear format. The upper five bits [7:3] of the high 0 None of the above 0 data form the two’s complement representation of the exponent which is fixed at –5 (decimal). The remaining 11 bits are used for two’s complement representation of the High Byte th mantissa, with the 11 bit fixed at zero since only positive Default Bit Position Flag numbers are valid. Value 7 VOUT fault or warning 0 During module manufacture, offset and gain correction 6 IOUT fault or warning 0 values are written into the non-volatile memory of the 5 X 0 module. The command VIN_CAL_OFFSET can be used to read 4 X 0 and/or write the offset - two bytes consisting of a five-bit 3 POWER_GOOD# (is negated) 0 exponent (fixed at -5) and a11-bit mantissa in two’s 2 X 0 complement format. The allowed range for this offset correction is -2 to 1.968V, and the resolution is 32mV. The 1 X 0 command VIN_CAL_GAIN can be used to read and/or write 0 X 0 the gain correction - two bytes consisting of a five-bit exponent (fixed at -8) and a 11-bit mantissa. The range of this STATUS_VOUT : Returns one byte of information relating to correction factor is -0.125V to +0.121V, with a resolution of the status of the module’s output voltage related faults. 0.004V. The corrected output voltage reading is then given by: Default Bit Position Flag Value V ( Final) IN 7 VOUT OV Fault 0 [ V ( Initial ) (1 VIN _ CAL _ GAIN)] IN 6 X 0  VIN _ CAL _ OFFSET 5 X 0 4 VOUT UV Fault 0 Reading the Status of the Module using the PMBus 3 X 0 2 X 0 The module supports a number of PMBus status information 1 X 0 commands. However, not all features are supported in these commands. A 1 in the bit position indicates the fault that is 0 X 0 flagged. STATUS_BYTE : Returns one byte of information with a STATUS_IOUT : Returns one byte of information relating to the summary of the most critical device faults. status of the module’s output voltage related faults. Default Default Bit Position Flag Bit Position Flag Value Value 7 X 0 7 IOUT OC Fault 0 6 OFF 0 6 X 0 5 VOUT Overvoltage 0 5 IOUT OC Warning 0 4 IOUT Overcurrent 0 4 X 0 3 VIN Undervoltage 0 3 X 0 2 Temperature 0 2 X 0 1 CML (Comm. Memory Fault) 0 1 X 0 0 None of the above 0 0 X 0 September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 20 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current STATUS_TEMPERATURE: Returns one byte of information relating to the status of the module’s temperature related faults. Default Bit Position Flag Value 7 OT Fault 0 6 OT Warning 0 5 X 0 4 X 0 3 X 0 2 X 0 1 X 0 0 X 0 STATUS_CML : Returns one byte of information relating to the status of the module’s communication related faults. Default Bit Position Flag Value 7 Invalid/Unsupported Command 0 6 Invalid/Unsupported Command 0 5 Packet Error Check Failed 0 4 X 0 3 X 0 2 X 0 1 Other Communication Fault 0 0 X 0 MFR_VIN_MIN : Returns minimum input voltage as two data bytes of information in Linear format (upper five bits are exponent – fixed at -2, and lower 11 bits are mantissa in two’s complement format – fixed at 12) MFR_VOUT_MIN : Returns minimum output voltage as two data bytes of information in Linear format (upper five bits are exponent – fixed at -10, and lower 11 bits are mantissa in two’s complement format – fixed at 614) MFR_SPECIFIC_00 : Returns information related to the type of module. Bits [7:2] in the Low Byte indicate the module type (000100 corresponds to the MDT040 series of module). Bits 1:0 in the High Byte are used to indicate the manufacturer ID, with 00 reserved for GE. Low Byte Default Bit Position Flag Value 7:2 Module Name 000100 1:0 Reserved 10 High Byte Default Bit Position Flag Value 7:0 Module Revision Number None 1:0 Manufacturer ID 00 September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 21 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Summary of Supported PMBus Commands Please refer to the PMBus 1.1 specification for more details of these commands. Table 6 Hex Non-Volatile Command Brief Description Code Memory Storage Turn Module on or off. Also used to margin the output voltage Format Unsigned Binary Bit Position 7 6 5 4 3 2 1 0 01 OPERATION Access r/w r r/w r/w r/w r/w r r Function On X Margin X X Default Value 0 0 0 0 0 0 X X Configures the ON/OFF functionality as a combination of analog ON/OFF pin and PMBus commands Format Unsigned Binary Bit Position 02 ON_OFF_CONFIG 7 6 5 4 3 2 1 0 YES Access r r r r/w r/w r/w r/w r Function X X X pu cmd cpr pol cpa Default Value 0 0 0 1 0 1 1 1 Clear any fault bits that may have been set, also releases the SMBALERT# signal if 03 CLEAR_FAULTS the device has been asserting it. Used to control writing to the module via PMBus. Copies the current register setting in the module whose command code matches the value in the data byte into non- volatile memory (EEPROM) on the module Format Unsigned Binary Bit Position 7 6 5 4 3 2 1 0 Access r/w r/w r/w x x x x x Function bit7 bit6 bit5 X X X X X Default Value 0 0 0 X X X X X 10 WRITE_PROTECT YES Bit5: 0 – Enables all writes as permitted in bit6 or bit7 1 – Disables all writes except the WRITE_PROTECT, OPERATION and ON_OFF_CONFIG (bit 6 and bit7 must be 0) Bit 6: 0 – Enables all writes as permitted in bit5 or bit7 1 – Disables all writes except for the WRITE_PROTECT and OPERATION commands (bit5 and bit7 must be 0) Bit7: 0 – Enables all writes as permitted in bit5 or bit6 1 – Disables all writes except for the WRITE_PROTECT command (bit5 and bit6 must be 0) Copies all current register settings in the module into non-volatile memory 11 STORE_DEFAULT_ALL (EEPROM) on the module. Takes about 50ms for the command to execute. Restores all current register settings in the module from values in the module non- 12 RESTORE_DEFAULT_ALL volatile memory (EEPROM) Copies the current register setting in the module whose command code matches the value in the data byte into non-volatile memory (EEPROM) on the module 13 STORE_DEFAULT_CODE Bit Position 7 6 5 4 3 2 1 0 Access w w w w w w w w Function Command code Restores the current register setting in the module whose command code matches the value in the data byte from the value in the module non-volatile memory (EEPROM) 14 RESTORE_DEFAULT_CODE Bit Position 7 6 5 4 3 2 1 0 Access w w w w w w w w Function Command code The module has MODE set to Linear and Exponent set to -10. These values cannot be changed Bit Position 7 6 5 4 3 2 1 0 20 VOUT_MODE Access r r r r r r r r Function Mode Exponent Default Value 0 0 0 1 0 1 1 0 September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 22 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Table 6 (continued) Hex Non-Volatile Command Brief Description Code Memory Storage Apply a fixed offset voltage to the output voltage command value. Exponent is fixed at -10. Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r/w r r/w r/w r/w r/w r/w r/w Function High Byte 22 VOUT_TRIM YES Default Value 0 0 0 0 0 0 0 0 Bit Position 7 6 5 4 3 2 1 0 Access r/w r/w r/w r/w r/w r/w r/w r/w Function Low Byte Default Value 0 0 0 0 0 0 0 0 Sets the target voltage for margining the output high. Exponent is fixed at -10. Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r/w r/w r/w r/w r/w r/w r/w Function High Byte 25 VOUT_MARGIN_HIGH YES Default Value 0 0 0 0 0 1 0 1 Bit Position 7 6 5 4 3 2 1 0 Access r/w r/w r/w r/w r/w r/w r/w r/w Function Low Byte Default Value 0 1 0 0 0 1 1 1 Sets the target voltage for margining the output low. Exponent is fixed at -10 Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r/w r/w r/w r/w r/w r/w r/w Function High Byte 26 VOUT_MARGIN_LOW YES Default Value 0 0 0 0 0 1 0 0 Bit Position 7 6 5 4 3 2 1 0 Access r/w r/w r/w r/w r/w r/w r/w r/w Function Low Byte Default Value 0 1 0 1 0 0 0 1 Sets the scaling of the output voltage – equal to the feedback resistor divider ratio Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r/w r/w Function Exponent Mantissa 29 VOUT_SCALE_LOOP YES Default Value 1 0 1 1 1 0 0 1 Bit Position 7 6 5 4 3 2 1 0 Access r/w r/w r/w r/w r/w r/w r/w r/w Function Mantissa Default Value 0 0 0 0 0 0 0 0 Sets the value of input voltage at which the module turns on Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r Function Exponent Mantissa 35 VIN_ON YES Default Value 1 1 1 1 0 0 0 0 Bit Position 7 6 5 4 3 2 1 0 Access r r/w r/w r/w r/w r/w r/w r/w Function Mantissa Default Value 0 0 0 0 1 1 1 0 September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 23 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Table 6 (continued) Hex Non-Volatile Command Brief Description Code Memory Storage Sets the value of input voltage at which the module turns off Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r Function Exponent Mantissa 36 VIN_OFF YES Default Value 1 1 1 1 0 0 0 0 Bit Position 7 6 5 4 3 2 1 0 Access r r/w r/w r/w r/w r/w r/w r/w Function Mantissa Default Value 0 0 0 0 1 1 0 0 Returns the value of the gain correction term used to correct the measured output current Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r/w Function 38 IOUT_CAL_GAIN Exponent Mantissa YES Default Value 1 0 0 0 1 0 0 0 Bit Position 7 6 5 4 3 2 1 0 Access r/w r/w r/w r/w r/w r/w r/w r/w Function Mantissa Default Value V: Variable based on factory calibration Returns the value of the offset correction term used to correct the measured output current Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r/w r r 39 IOUT_CAL_OFFSET Function Exponent Mantissa YES Default Value 1 1 1 0 0 1 1 1 Bit Position 7 6 5 4 3 2 1 0 Access r r r/w r/w r/w r/w r/w r/w Function Mantissa Default Value V: Variable based on factory calibration Sets the voltage level for an output overvoltage fault. Exponent is fixed at -10. Suggested value shown for 1.2Vo. Should be changed for different output voltage. Values can be 108%, 110%, 112% or 115% of output voltage Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r/w r/w r/w r/w r/w r/w r/w 40 VOUT_OV_FAULT_LIMIT YES Function High Byte Default Value 0 0 0 0 0 1 0 1 Bit Position 7 6 5 4 3 2 1 0 Access r/w r/w r/w r/w r/w r/w r/w r/w Function Low Byte Default Value 0 1 1 0 0 0 0 0 Instructs the module on what action to take in response to a output overvoltage fault Format Unsigned Binary Bit Position 7 6 5 4 3 2 1 0 41 VOUT_OV_FAULT_RESPONSE YES Access r/w r/w r/w r/w r/w r r r RSP RSP Function RS[2] RS[1] RS[0] X X X [1] [0] Default Value 1 1 1 1 1 1 0 0 September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 24 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Table 6 (continued) Hex Non-Volatile Command Brief Description Code Memory Storage Sets the voltage level for an output undervoltage fault. Exponent is fixed at -10. Suggested value shown for 1.2Vo. Should be changed for different output voltage. Values can be 92%, 90%, 88% or 85% of output voltage Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r/w r/w r/w r/w r/w r/w r/w 44 VOUT_UV_FAULT_LIMIT YES Function High Byte Default Value 0 0 0 0 0 1 0 0 Bit Position 7 6 5 4 3 2 1 0 Access r/w r/w r/w r/w r/w r/w r/w r/w Function Low Byte Default Value 0 0 1 1 1 0 0 1 Instructs the module on what action to take in response to a output undervoltage fault Format Unsigned Binary Bit Position 7 6 5 4 3 2 1 0 45 VOUT_UV_FAULT_RESPONSE YES Access r/w r/w r/w r/w r/w r r r RSP RSP Function RS[2] RS[1] RS[0] X X X [1] [0] Default Value 0 0 0 0 0 1 0 0 Sets the output overcurrent fault level in A (cannot be changed) Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r Function Exponent Mantissa 46 IOUT_OC_FAULT_LIMIT YES Default Value 1 1 1 1 1 0 0 0 Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r Function Mantissa Default Value 0 1 1 1 0 1 0 0 Sets the output overcurrent warning level in A Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r Function Exponent Mantissa 4A IOUT_OC_WARN_LIMIT YES Default Value 1 1 1 1 1 0 0 0 Bit Position 7 6 5 4 3 2 1 0 Access r r/w r/w r/w r/w r/w r/w r/w Function Mantissa Default Value 0 1 1 1 0 0 1 0 Sets the output voltage level at which the PGOOD pin is asserted high. Exponent is fixed at -10. Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r/w r/w r/w r/w r/w r/w r/w Function High Byte 5E POWER_GOOD_ON YES Default Value 0 0 0 0 0 1 0 0 Bit Position 7 6 5 4 3 2 1 0 Access r/w r/w r/w r/w r/w r/w r/w r/w Function Low Byte Default Value 0 1 1 0 1 0 1 0 September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 25 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Table 6 (continued) Hex Non-Volatile Command Brief Description Code Memory Storage Sets the output voltage level at which the PGOOD pin is de-asserted low. Exponent is fixed at - 10. Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r/w r/w r/w r/w r/w r/w r/w 5F POWER_GOOD_OFF Function High Byte YES Default Value 0 0 0 0 0 1 0 0 Bit Position 7 6 5 4 3 2 1 0 Access r/w r/w r/w r/w r/w r/w r/w r/w Function Low Byte Default Value 0 1 0 1 0 0 1 0 Sets the rise time of the output voltage during startup Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r/w Function Exponent Mantissa 61 TON_RISE YES Default Value 1 1 1 0 0 0 0 0 Bit Position 7 6 5 4 3 2 1 0 Access r/w r/w r/w r/w r/w r/w r/w r/w Function Mantissa Default Value 0 0 1 0 1 0 1 1 Returns one byte of information with a summary of the most critical module faults Format Unsigned Binary Bit Position 7 6 5 4 3 2 1 0 78 STATUS_BYTE Access r r r r r r r r VOUT IOUT_ OTHE Flag X OFF VIN_UV TEMP CML _OV OC R Default Value 0 0 0 0 0 0 0 0 Returns two bytes of information with a summary of the module’s fault/warning conditions Format Unsigned binary Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r IOUT_ Flag VOUT X X PGOOD X X X OC 79 STATUS_WORD Default Value 0 0 0 0 0 0 0 0 Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r VOUT IOUT_ OTHE Flag X OFF VIN_UV TEMP CML _OV OC R Default Value 0 0 0 0 0 0 0 0 Returns one byte of information with the status of the module’s output voltage related faults Format Unsigned Binary Bit Position 7 6 5 4 3 2 1 0 7A STATUS_VOUT Access r r r r r r r r Flag VOUT_OV X X VOUT_UV X X X X Default Value 0 0 0 0 0 0 0 0 Returns one byte of information with the status of the module’s output current related faults Format Unsigned Binary Bit Position 7 6 5 4 3 2 1 0 7B STATUS_IOUT Access r r r r r r r r Flag IOUT_OC X IOUT_OC_WARN X X X X X Default Value 0 0 0 0 0 0 0 0 September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 26 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Table 6 (continued) Hex Non-Volatile Command Brief Description Code Memory Storage Returns one byte of information with the status of the module’s temperature related faults Format Unsigned Binary Bit Position 7 6 5 4 3 2 1 0 7D STATUS_TEMPERATURE Access r r r r r r r r Flag OT_FAULT OT_WARN X X X X X X Default Value 0 0 0 0 0 0 0 0 Returns one byte of information with the status of the module’s communication related faults Format Unsigned Binary Bit Position 7 6 5 4 3 2 1 0 7E STATUS_CML Access r r r r r r r r Other Invalid Invalid PEC Flag X X X Comm X Command Data Fail Fault Default Value 0 0 0 0 0 0 0 0 Returns the value of the input voltage applied to the module Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r Function Exponent Mantissa 88 READ_VIN Default Value 1 1 0 1 1 0 0 0 Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r Function Mantissa Default Value 0 0 0 0 0 0 0 0 Returns the value of the output voltage of the module. Exponent is fixed at -10. Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r Function Mantissa 8B READ_VOUT Default Value 0 0 0 0 0 0 0 0 Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r Function Mantissa Default Value 0 0 0 0 0 0 0 0 Returns the value of the output current of the module Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r Function Exponent Mantissa 8C READ_IOUT Default Value 1 1 1 0 0 0 0 0 Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r Function Mantissa Default Value 0 0 0 0 0 0 0 0 Returns one byte indicating the module is compliant to PMBus Spec. 1.1 (read only) Format Unsigned Binary 98 PMBUS_REVISION Bit Position 7 6 5 4 3 2 1 0 YES Access r r r r r r r r Default Value 0 0 0 1 0 0 0 1 September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 27 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Table 6 (continued) Hex Non-Volatile Command Brief Description Code Memory Storage Returns the minimum input voltage the module is specified to operate at (read only) Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r Function Exponent Mantissa A0 MFR_VIN_MIN YES Default Value 1 1 1 1 0 0 0 0 Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r Function Mantissa Default Value 0 0 0 0 1 1 0 0 Returns the minimum output voltage possible from the module (read only) Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r Function Mantissa A4 MFR_VOUT_MIN YES Default Value 0 0 0 0 0 0 1 0 Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r Function Mantissa Default Value 0 1 1 0 0 1 1 0 Returns module name information (read only) Format Unsigned Binary Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r Function Reserved D0 MFR_SPECIFIC_00 YES Default Value 0 0 0 0 0 0 0 0 Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r Function Module Name Reserved Default Value 0 0 0 1 0 0 1 0 Applies an offset to the READ_VOUT command results to calibrate out offset errors in module measurements of the output voltage (between -125mV and +124mV). Exponent is fixed at -10. Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r/w r r r r r r r D4 VOUT_CAL_OFFSET YES Function Mantissa Default Value V 0 0 0 0 0 0 0 Bit Position 7 6 5 4 3 2 1 0 Access r r/w r/w r/w r/w r/w r/w r/w Function Mantissa Default Value V V V V V V V V Applies a gain correction to the READ_VOUT command results to calibrate out gain errors in module measurements of the output voltage (between -0.125 and 0.121) Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r/w r r D5 VOUT_CAL_GAIN Function Exponent Mantissa YES Default Value 1 1 0 0 0 0 0 V Bit Position 7 6 5 4 3 2 1 0 Access r r r r/w r/w r/w r/w r/w Function Mantissa Default Value V V V V V V V V September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 28 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current TTable 6 (continued) Hex Non-Volatile Command Brief Description Code Memory Storage Applies an offset correction to the READ_VIN command results to calibrate out offset errors in module measurements of the input voltage (between -2V and +1.968V) Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r/w r r D6 VIN_CAL_OFFSET Function Exponent Mantissa YES Default Value 1 1 0 1 V 0 0 V Bit Position 7 6 5 4 3 2 1 0 Access r r r/w r/w r/w r/w r/w r/w Function Mantissa Default Value 0 0 V V V V V V Applies a gain correction to the READ_VIN command results to calibrate out gain errors in module measurements of the input voltage (between -0.125 and 0.121) Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r/w r r Function Exponent Mantissa D7 VIN_CAL_GAIN YES Default Value 1 1 0 0 V 0 0 V Bit Position 7 6 5 4 3 2 1 0 Access r r r r/w r/w r/w r/w r/w Function Mantissa Default Value 0 0 0 V V V V V September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 29 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current temperatures at these points should not exceed 120ºC. The Thermal Considerations output power of the module should not exceed the rated Power modules operate in a variety of thermal power of the module (Vo,set x Io,max). environments; however, sufficient cooling should always be Please refer to the Application Note “Thermal provided to help ensure reliable operation. Characterization Process For Open-Frame Board-Mounted Considerations include ambient temperature, airflow, Power Modules” for a detailed discussion of thermal module power dissipation, and the need for increased aspects including maximum device temperatures. reliability. A reduction in the operating temperature of the module will result in an increase in reliability. The thermal data presented here is based on physical measurements taken in a wind tunnel. The test set-up is shown in Figure 30. The preferred airflow direction for the module is in Figure 31. 25.4_ Wind Tunnel (1.0) PWBs Power Module 76.2_ (3.0) x Probe Location for measuring 12.7_ airflow and (0.50) ambient temperature Figure 31. Preferred airflow direction and location of hot- Air spot of the module (Tref). flow Figure 30. Thermal Test Setup. The thermal reference points, T used in the specifications ref are also shown in Figure 30. For reliable operation the September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 30 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Example Application Circuit Requirements: Vin: 12V Vout: 1.8V Iout: 30A max., worst case load transient is from 20A to 30A Vout: 1.5% of Vout (27mV) for worst case load transient Vin, ripple 1.5% of Vin (180mV, p-p) Vin+ Vout+ VIN VOUT VS+ PGOOD RTUNE MODULE SEQ CTUNE CLK CI2 TRIM CI3 CI1 CO3 CO1 CO2 DATA ADDR0 SMBALRT# RTrim ADDR1 ON/OFF RADDR1 RADDR0 SHARE SIG_GND GND VS- SYNC GND CI1 Decoupling cap - 1x0.01F/16V ceramic capacitor (e.g. Murata LLL185R71E103MA01) CI2 3x22F/16V ceramic capacitor (e.g. Murata GRM32ER61C226KE20) CI3 470F/16V bulk electrolytic CO1 Decoupling cap - 1x0.01F/16V ceramic capacitor (e.g. Murata LLL185R71E103MA01) CO2 4 x 47µF/6.3V ceramic capacitor (e.g. Murata GRM31CR60J476ME19) CO3 6 X330µF/6.3V Polymer (e.g. Sanyo Poscap) CTune 5600pF ceramic capacitor (can be 1206, 0805 or 0603 size) RTune 220 ohms SMT resistor (can be 1206, 0805 or 0603 size) RTrim 10k SMT resistor (can be 1206, 0805 or 0603 size, recommended tolerance of 0.1%) Note: The DATA, CLK and SMBALRT pins do not have any pull-up resistors inside the module. Typically, the SMBus master controller will have the pull-up resistors as well as provide the driving source for these signals. September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 31 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Mechanical Outline Dimensions are in millimeters and (inches). Tolerances: x.x mm  0.5 mm (x.xx in.  0.02 in.) [unless otherwise indicated] x.xx mm  0.25 mm (x.xxx in  0.010 in.) SIDE VIEW 3 6 7 9 4 5 14 13 12 BOTTOM VIEW 15 11 10 8 1 2 16 17 18 19 FUNCTION PIN FUNCTION 1 ON/OFF 11 SIG_GND 2 VIN 12 VS- 3 SEQ 13 CLK 4 GND 14 DATA 5 VOUT 15 SYNC 6 TRIM 16 PG 7 VS+ 17 SMBALERT# 8 GND 18 ADDRESS 0 9 SHARE 19 ADDRESS 1 10 GND September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 32 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Recommended Pad Layout Dimensions are in millimeters and (inches). Tolerances: x.x mm  0.5 mm (x.xx in.  0.02 in.) [unless otherwise indicated] x.xx mm  0.25 mm (x.xxx in  0.010 in.) PIN FUNCTION PIN FUNCTION 1 ON/OFF 11 SIG_GND 2 VIN 12 VS- 3 SEQ 13 CLK 4 GND 14 DATA 5 VOUT 15 SYNC 6 TRIM 16 PG 7 VS+ 17 SMBALERT# 8 GND 18 ADDRESS 0 9 SHARE 19 ADDRESS 1 10 GND September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 33 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Packaging Details TM The 12V Digital Mega DLynx 40A modules are supplied in tape & reel as standard. Modules are shipped in quantities of 140 modules per reel. All Dimensions are in millimeters and (in inches). Reel Dimensions: Outside Dimensions: 330.2 mm (13.00) Inside Dimensions: 177.8 mm (7.00”) Tape Width: 56.00 mm (2.205”) September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 34 Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current broken, the floor life of the product at conditions of  30°C Surface Mount Information and 60% relative humidity varies according to the MSL rating (see J-STD-033A). The shelf life for dry packed SMT packages Pick and Place will be a minimum of 12 months from the bag seal date, TM when stored at the following conditions: < 40° C, < 90% The 40A Digital Mega DLynx modules use an open frame relative humidity. construction and are designed for a fully automated assembly process. The modules are fitted with a label 300 Per J-STD-020 Rev. C designed to provide a large surface area for pick and place Peak Temp 260°C operations. The label meets all the requirements for surface 250 mount processing, as well as safety standards, and is able to Cooling o 200 withstand reflow temperatures of up to 300 C. The label also Zone * Min. Time Above 235°C carries product information such as product code, serial 15 Seconds 150 number and the location of manufacture. Heating Zone *Time Above 217°C 1°C/Second 60 Seconds Nozzle Recommendations 100 The module weight has been kept to a minimum by using 50 open frame construction. Variables such as nozzle size, tip style, vacuum pressure and placement speed should be 0 Reflow Time (Seconds) considered to optimize this process. The minimum recommended inside nozzle diameter for reliable operation is Figure 32. Recommended linear reflow profile using 3mm. The maximum nozzle outer diameter, which will safely Sn/Ag/Cu solder. fit within the allowable component spacing, is 7 mm. Post Solder Cleaning and Drying Considerations Bottom Side / First Side Assembly Post solder cleaning is usually the final circuit-board This module is not recommended for assembly on the bottom assembly process prior to electrical board testing. The result side of a customer board. If such an assembly is attempted, of inadequate cleaning and drying can affect both the components may fall off the module during the second reflow reliability of a power module and the testability of the process. finished circuit-board assembly. For guidance on Lead Free Soldering appropriate soldering, cleaning and drying procedures, refer to Board Mounted Power Modules: Soldering and Cleaning The modules are lead-free (Pb-free) and RoHS compliant and Application Note (AN04-001). fully compatible in a Pb-free soldering process. Failure to observe the instructions below may result in the failure of or cause damage to the modules and can adversely affect long- term reliability. Pb-free Reflow Profile Power Systems will comply with J-STD-020 Rev. C (Moisture/Reflow Sensitivity Classification for Nonhermetic Solid State Surface Mount Devices) for both Pb-free solder profiles and MSL classification procedures. This standard provides a recommended forced-air-convection reflow profile based on the volume and thickness of the package (table 4- 2). The suggested Pb-free solder paste is Sn/Ag/Cu (SAC). The recommended linear reflow profile using Sn/Ag/Cu solder is shown in Fig. 32. Soldering outside of the recommended profile requires testing to verify results and performance. MSL Rating TM The 40A Digital Mega DLynx modules have a MSL rating of 2a. Storage and Handling The recommended storage environment and handling procedures for moisture-sensitive surface mount packages is detailed in J-STD-033 Rev. A (Handling, Packing, Shipping and Use of Moisture/Reflow Sensitive Surface Mount Devices). Moisture barrier bags (MBB) with desiccant are required for MSL ratings of 2 or greater. These sealed packages should not be broken until time of use. Once the original package is September 7, 2017 ©2016 General Electric Company. All rights reserved. Page 35 Reflow Temp (°C) Data Sheet GE TM 40A Digital MegaDLynx : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Ordering Information Please contact your GE Sales Representative for pricing, availability and optional features. Table 7. Device Codes Input Output Output On/Off Device Codes Sequencing Comcodes Voltage Range Voltage Current Logic MDT040A0X3-SRPHZ 4.5 – 14.4Vdc 0.45 – 2.0Vdc 40A Negative Yes CC109159760 MDT040A0X43-SRPHZ 4.5 – 14.4Vdc 0.45 – 2.0Vdc 40A Positive Yes CC109159777 MDT040A0X3-SRPHDZ 4.5 – 14.4Vdc 0.45 – 2.0Vdc 40A Negative Yes 150022587 -Z refers to RoHS compliant parts Table 8. Coding Scheme Package Remote ROHS Input voltage Output Output On/Off Identifie Family Sense Options Complia range current voltage logic nce r 3 -D Z M D T 040A0 X 4 -SR -P -H D = 105°C Z = P=Pico D=Dlynx T=with 40A X = 4 = 3 = S = Paralleling 2 Extra operating ROHS6 Digital EZ_Sequence progra positive Remote Surface Ground ambient, U=Micro mmable Sense Mount Pins 40G V=DLynx X=without output No operating M=Mega Analog. sequencing entry = shock as negativ R = Tape per MIL G=Giga e & Reel Std 810F GE Energy Digital Non-Isolated DC-DC products use technology licensed from Power-One, protected by US patents: US20040246754, US2004090219A1, US2004093533A1, US2004123164A1, US2004123167A1, US2004178780A1, US2004179382A1, US20050200344, US20050223252, US2005289373A1, US20060061214, US2006015616A1, US20060174145, US20070226526, US20070234095, US20070240000, US20080052551, US20080072080, US20080186006, US6741099, US6788036, US6936999, US6949916, US7000125, US7049798, US7068021, US7080265, US7249267, US7266709, US7315156, US7372682, US7373527, US7394445, US7456617, US7459892, US7493504, US7526660. Outside the US the Power-One licensed technology is protected by patents: AU3287379AA, AU3287437AA, AU3290643AA, AU3291357AA, CN10371856C, CN1045261OC, CN10458656C, CN10459360C, CN10465848C, CN11069332A, CN11124619A, CN11346682A, CN1685299A, CN1685459A, CN1685582A, CN1685583A, CN1698023A, CN1802619A, EP1561156A1, EP1561268A2, EP1576710A1, EP1576711A1, EP1604254A4, EP1604264A4, EP1714369A2, EP1745536A4, EP1769382A4, EP1899789A2, EP1984801A2, W004044718A1, W004045042A3, W004045042C1, W004062061 A1, W004062062A1, W004070780A3, W004084390A3, W004084391A3, W005079227A3, W005081771A3, W006019569A3, W02007001584A3, W02007094935A3 Contact Us For more information, call us at USA/Canada: +1 877 546 3243, or +1 972 244 9288 Asia-Pacific: +86.021.54279977*808 Europe, Middle-East and Africa: +49.89.878067-280 www.gecriticalpower.com GE Critical Power reserves the right to make changes to the product(s) or information contained herein without notice, and no liability is assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information. September 7, 2017 ©2016 General Electric Company. All International rights reserved. Version 1.20