Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current Features ▪ Compliant to RoHS II EU “Directive 2011/65/EU” ▪ Compatible in a Pb-free or SnPb reflow environment (Z versions) ▪ Compliant to IPC- 9592 (September 2008), Category 2, Class I ▪ Compliant to REACH Directive (EC) No 1907/2006 ▪ DOSA based ▪ Wide Input voltage range (4.5Vdc-14.4Vdc) ▪ Output voltage programmable from 0.51Vdc to 3.63Vdc TM # via external resistor and PMBus TM # ▪ Digital interface through the PMBus protocol TM ▪ Tunable Loop to optimize dynamic output voltage RoHS Compliant response Applications ▪ Flexible output voltage sequencing EZ-SEQUENCE ▪ Distributed power architectures ▪ Power Good signal ▪ Fixed switching frequency with capability of external ▪ Intermediate bus voltage applications synchronization ▪ Telecommunications equipment ▪ Output over current protection (non-latching) ▪ Servers and storage applications ▪ Over temperature protection ▪ Networking equipment ▪ Remote On/Off ▪ Industrial equipment ▪ Ability to sink and source current Vin+ Vout+ ▪ Cost efficient open frame design VIN VOUT VS+ ▪ Small size: 20.32 mm x 11.45 mm x 11 mm (0.8 in x 0.45 PGOOD RTUNE in x 0.433 in) MODULE SEQ ▪ Wide operating temperature range [-40°C to 85°C] CTUNE CLK nd † ▪ UL* 60950-1 2 Ed. Recognized, CSA C22.2 No. Cin TRIM Co DATA ‡ nd 60950-1-07 Certified, and VDE (EN60950-1 2 Ed.) ADDR0 SMBALRT# RTrim ADDR1 Licensed ON/OFF RADDR1 RADDR0 SYNC ▪ ISO** 9001 and ISO 14001 certified manufacturing SIG_GND facilities GND VS- GND Description TM The 35A Digital MicroDLynxII power modules are non-isolated dc-dc converters that can deliver up to 35A of output current. These modules operate over a wide range of input voltage (VIN = 4.5Vdc-14.4Vdc) and provide a precisely regulated output TM voltage from 0.51Vdc to 3.63Vdc, programmable via an external resistor and PMBus control. Features include a digital TM interface using the PMBus protocol, remote On/Off, adjustable output voltage, over current and over temperature TM # protection. The PMBus interface supports a range of commands to both control and monitor the module. The module also TM 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) May 10, 2018 ©2017 General Electric Company. All rights reserved. Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current Change History (excludes grammar & clarifications) V1.9, 5-110-2017 p.37 – Updated options table 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 V -0.3 15 V IN Continuous VS, ON/OFF, SEQ All 7 V CLK, DATA, SMBALERT#,SYNC All -0.3 3.6 V Operating Ambient Temperature All T -40 85 °C A (see Thermal Considerations section) Storage Temperature All T -55 125 °C stg 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 33 Adc (V =4.5V to 14V, I =I ) IN O O, max V = 0.6 O,set I 43 mA IN,No load Input No Load Current Vdc (V = 12Vdc, I = 0, module enabled) IN O VO,set = I 106 mA IN,No load 3.63Vdc Input Stand-by Current All IIN,stand-by 16 mA (V = 12Vdc, module disabled) IN 2 2 Inrush Transient All I t 1 A s Input Reflected Ripple Current, peak-to-peak (5Hz to 20MHz, 1μH source impedance; VIN =0 to 14V, IO= IOmax All 35 mAp-p ; See Test Configurations) Input Ripple Rejection (120Hz) All -71 dB Output Voltage Set-point accuracy over entire output range 0 to 85°C, Vo=over entire range All VO, set -0.5 +0.5 % VO, set -40 to 85°C, Vo=over entire range All VO, set -1 +1 % VO, set 1 Voltage Regulation Line Regulation (VIN=V to IN, min 3 mV VIN, max) Load (IO=IO, min to IO, max) Regulation All 5 mV 1 Worst case Line and load regulation data, all temperatures, from design verification testing as per IPC9592. May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 2 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current Electrical Specifications (continued) Symbo Parameter Device Min Typ Max Unit l Adjustment Range (selected by an external resistor) (Some output voltages may not be possible depending on All V 0.6 3.63 Vdc O the input voltage – see Feature Descriptions Section) PMBus Adjustable Output Voltage Range All VO,adj -15 0 +10 %VO,set PMBus Output Voltage Adjustment Step Size All 0.4 %VO,set Remote Sense Range All 0.5 Vdc Output Ripple and Noise on nominal output (VIN=VIN, nom and IO=IO, min to IO, max Co = 0.1μF // 8x47 μF ceramic capacitors) Peak-to-Peak (5Hz to 20MHz bandwidth) All 17 mVpk-pk RMS (5Hz to 20MHz bandwidth) All 3.2 mV rms 2 External Capacitance TM Without the Tunable Loop ESR ≥ 1 mΩ All CO, max 8x47 16x47 μF TM With the Tunable Loop ESR ≥ 0.15 mΩ All C 8x47 7000 μF O, max ESR ≥ 10 mΩ All C 8x47 8500 μF O, max 2 Output Current (in either sink or source mode) All I 0 35 Adc o Output Current Limit Inception (Hiccup Mode) 3 All IO, lim 41 Adcmax (current limit does not operate in sink mode) Output Short-Circuit Current All IO, s/c 18 Arms (V ≤250mV) ( Hiccup Mode ) O Efficiency VO,set = 0.6Vdc η 80.2% % V = 12Vdc, T =25°C V = 1.2Vdc η 87.8% % IN A O, set IO=IO, max , VO= VO,set VO,set = 1.8Vdc η 91.4% % VO,set = 2.5Vdc η 93.2% % V = 3.3Vdc η 94.3% % O,set Switching Frequency All fsw 500 kHz 2 TM External capacitors may require using the new Tunable Loop feature to ensure that the module is stable as well as getting the best TM transient response. See the Tunable Loop section for details. 3 For ambient temperatures lower that -20C the minimum OCP is 30A. Monotonic start-up is guaranteed for output current 30A and below. May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 3 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current Electrical Specifications (continued) Parameter Device Symbol Min Typ Max Unit Frequency Synchronization All Synchronization Frequency Range (2 x fswitch) All 950 1000 1050 kHz High-Level Input Voltage All VIH 2 V Low-Level Input Voltage All VIL 0.4 V Minimum Pulse Width, SYNC All tSYNC 100 ns Maximum SYNC rise time All tSYNC_SH 100 ns General Specifications Parameter Device Min Typ Max Unit Calculated MTBF (I =0.8I , T =40°C) Telecordia Issue 2 O O, max A All 66,823,110 Hours Method 1 Case 3 Weight 7.3 g (oz.) Feature Specifications Unless otherwise indicated, specifications apply overall 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 (V =V to V ; open collector or equivalent, IN IN, min IN, max Signal referenced to GND) Device code with suffix “4” – Positive Logic (See Ordering Information) Logic High (Module ON) Input High Current All IIH 17 uA Input High Voltage All VIH 2.1 7 V Logic Low (Module OFF) Input Low Current All IIL 2 uA Input Low Voltage All VIL -0.2 0.8 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 3 mA Input High Voltage All VIH 2.1 7 Vdc Logic Low (Module ON) Input low Current All IIL 500 μA Input Low Voltage All VIL 0 0.8 Vdc May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 4 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current Feature Specifications (cont.) Parameter Device Symbol Min Typ Max Units Turn-On Delay and Rise Times (VIN=VIN, nom, IO=IO, max , VO to within ±1% of steady state) Case 1: On/Off input is enabled and then input power is applied (delay from instant at which V = V until Vo = All Tdelay 1.2 msec IN IN, min 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 at All Tdelay 1.1 msec which Von/Off is enabled until Vo = 10% of Vo, set) Output voltage Rise time (time for Vo to rise from All Trise 2.7 msec 10% of Vo, set to 90% of Vo, set) o Output voltage overshoot (T = 25 C A V = V to V ,I = I to I ) 3.0 % V IN IN, min IN, max O O, min O, max O, set With or without maximum external capacitance Over Temperature Protection All T 122 °C OT (See Thermal Considerations section) PMBus Over Temperature Warning Threshold * All T 105 °C WARN Tracking Accuracy (Power-Up: 2V/ms) All VSEQ –Vo 100 mV (Power-Down: 2V/ms) All VSEQ –Vo 200 mV (VIN, min to VIN, max; IO, min to IO, max 0V < VSEQ < Vo) Input Undervoltage Lockout Turn-on Threshold All 4.25 Vdc Turn-off Threshold All 4.05 Vdc Hysteresis All 0.2 Vdc PMBus Adjustable Input Under Voltage Lockout Thresholds All 4 14 Vdc Resolution of Adjustable Input Under Voltage Threshold All 250 mV PGOOD (Power Good) Signal Interface Open Drain, Vsupply  5VDC Overvoltage threshold for PGOOD ON All 108.33 %V O, set Overvoltage threshold for PGOOD OFF All 112.5 %V O, set Undervoltage threshold for PGOOD ON All 91.67 %VO, set Undervoltage threshold for PGOOD OFF All 87.5 %VO, set Pulldown resistance of PGOOD pin All 40 70  Sink current capability into PGOOD pin All 5 mA * Over temperature Warning – Warning may not activate before alarm and unit may shutdown before warning May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 5 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A 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) I -10 10 μA IH Input low level current (CLK, DATA) I -10 10 μA IL Output Low Voltage (CLK, DATA, SMBALERT#) IOUT=2mA VOL 0.4 V Output high level open drain leakage current (DATA, V =3.6V I 0 10 μA OUT OH SMBALERT#) Pin capacitance C 0.7 pF O 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 Output current measurement range IRNG 0 50 A Output current measurement accuracy -40 to 85°C I -7 5 % ACC Temperature measurement accuracy @12Vin, 0°C to 85°C T ±10 °C ACC V measurement range 0 4 V OUT VOUT(rng) VOUT measurement accuracy -2 2 % VOUT, ACC May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 6 GE Data Sheet TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current Characteristic Curves TM o The following figures provide typical characteristics for the 35A Digital MicroDLynxII at 0.6Vo and 25 C. O OUTPUT CURRENT, I (A) AMBIENT TEMPERATURE, T C O A Figure 2. Derating Output Current versus Ambient Temperature Figure 1. Converter Efficiency versus Output Current. and Airflow. TIME, t (1s/div) TIME, t (20s /div) Figure 4. Transient Response to Dynamic Load Change from Figure 3. Typical output ripple (CO=8x47μF ceramic, VIN = 12V, 50% to 100% at 12Vin, Cout=8x47uF+24x330uF, CTune=18nF, Io = Io,max, ). RTune=300Ω TIME, t (2ms/div) TIME, t (2ms/div) Figure 6. Typical Start-up Using Input Voltage (VIN = 12V, Io = Figure 5. Typical Start-up Using On/Off Voltage (Io = Io,max). Io,max). May 10, 2018 ©2017 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 OLTAGE OUTPUT CURRENT, Io (A) V (V) (200mV/div) V (V) (10V/div) I (A) (10Adiv) V (V) (10mV/div) O IN O O GE Data Sheet TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current Characteristic Curves TM o The following figures provide typical characteristics for the 35A Digital MicroDLynxII at 1.2Vo and 25 C. O OUTPUT CURRENT, I (A) AMBIENT TEMPERATURE, T C O A Figure 8. Derating Output Current versus Ambient Temperature Figure 7. Converter Efficiency versus Output Current. and Airflow. TIME, t (1s/div) TIME, t (20s /div) Figure 10. Transient Response to Dynamic Load Change from Figure 9. Typical output ripple (C =8x47μF ceramic, VIN = 12V, O 50% to 100% at 12Vin, Cout=8x47uF+14x330uF, CTune=10nF, Io = Io,max, ). RTune=300Ω TIME, t (2ms/div) TIME, t (2ms/div) Figure 12. Typical Start-up Using Input Voltage (VIN = 12V, Io = Figure 11. Typical Start-up Using On/Off Voltage (Io = Io,max). Io,max). May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 8 OUTPUT VOLTAGE ON/OFF VOLTAGE OUTPUT VOLTAGE EFFICIENCY,  (%) V (V) (500mV/div) V (V) (5V/div) V (V) (10mV/div) O ON/OFF O OUTPUT VOLTAGE INPUT VOLTAGE OUTPUT CURRENT, OUTPUT VOLTAGE OUTPUT CURRENT, Io (A) V (V) (500mV/div) V (V) (10V/div) I (A) (10Adiv) V (V) (20mV/div) O IN O O GE Data Sheet TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current Characteristic Curves TM o The following figures provide typical characteristics for the 35A Digital MicroDLynxII at 1.8Vo and 25 C. O OUTPUT CURRENT, I (A) AMBIENT TEMPERATURE, T C O A Figure 14. Derating Output Current versus Ambient Figure 13. Converter Efficiency versus Output Current. Temperature and Airflow. TIME, t (1s/div) TIME, t (20s /div) Figure 16. Transient Response to Dynamic Load Change from Figure 15. Typical output ripple and noise (C =8x47μF ceramic, O 50% to 100% at 12Vin, Cout=8x47uF+7x330uF, CTune=4.7nF, VIN = 12V, Io = Io,max, ). RTune=221Ω TIME, t (2ms/div) TIME, t (2ms/div) Figure 18. Typical Start-up Using Input Voltage (VIN = 12V, Io = Figure 17. Typical Start-up Using On/Off Voltage (Io = Io,max). Io,max). May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 9 OUTPUT VOLTAGE ON/OFF VOLTAGE OUTPUT VOLTAGE EFFICIENCY,  (%) V (V) (1V/div) V (V) 5V/div) V (V) (10mV/div) O ON/OFF O OUTPUT VOLTAGE INPUT VOLTAGE OUTPUT CURRENT, OUTPUT VOLTAGE OUTPUT CURRENT, Io (A) VO (V) (1V/div) VIN (V) (10V/div) IO (A) (10Adiv) VO (V) (20mV/div) GE Data Sheet TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current Characteristic Curves TM o The following figures provide typical characteristics for the 35A Digital MicroDLynxII at 2.5Vo and 25 C. O OUTPUT CURRENT, I (A) AMBIENT TEMPERATURE, T C O A Figure 20. Derating Output Current versus Ambient Temperature Figure 19. Converter Efficiency versus Output Current. and Airflow. TIME, t (1s/div) TIME, t (20s /div) Figure 22. Transient Response to Dynamic Load Change from Figure 21. Typical output ripple and noise (C =8x47μF ceramic, O 50% to 100% at 12Vin, Cout=8x47uF+4x330uF, CTune=3300pF, VIN = 12V, Io = Io,max, ). RTune=221Ω TIME, t (2ms/div) TIME, t (2ms/div) Figure 24. Typical Start-up Using Input Voltage (VIN = 12V, Io = Figure 23. Typical Start-up Using On/Off Voltage (Io = Io,max). Io,max). May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 10 OUTPUT VOLTAGE ON/OFF VOLTAGE OUTPUT VOLTAGE EFFICIENCY,  (%) V (V) (1V/div) V (V) (5V/div) V (V) (10mV/div) O ON/OFF O OUTPUT VOLTAGE INPUT VOLTAGE OUTPUT CURRENT, OUTPUT VOLTAGE OUTPUT CURRENT, Io (A) V (V) (1V/div) V (V) (10V/div) I (A) (10Adiv) V (V) (50mV/div) O IN O O GE Data Sheet TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current Characteristic Curves TM o The following figures provide typical characteristics for the 35A Digital MicroDLynxII at 3.3Vo and 25 C. O OUTPUT CURRENT, I (A) AMBIENT TEMPERATURE, T C O A Figure 26. Derating Output Current versus Ambient Temperature Figure 25. Converter Efficiency versus Output Current. and Airflow. TIME, t (1s/div) TIME, t (20s /div) Figure 28 Transient Response to Dynamic Load Change from Figure 27. Typical output ripple and noise (C =7x22μF ceramic, O 50% to 100% at 12Vin, Cout=8x47uF+2x330uF, CTune=2700pF, VIN = 12V, Io = Io,max, ). RTune=221Ω TIME, t (2ms/div) TIME, t (2ms/div) Figure 30. Typical Start-up Using Input Voltage (VIN = 12V, Io = Figure 29. Typical Start-up Using On/Off Voltage (Io = Io,max). Io,max). May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 11 OUTPUT VOLTAGE ON/OFF VOLTAGE OUTPUT VOLTAGE EFFICIENCY,  (%) V (V) (1V/div) V (V) (5V/div) V (V) (20mV/div) O ON/OFF O OUTPUT VOLTAGE INPUT VOLTAGE OUTPUT CURRENT, OUTPUT VOLTAGE OUTPUT CURRENT, Io (A) VO (V) (1V/div) VIN (V) (10V/div) IO (A) (10Adiv) VO (V) (50mV/div) Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current 40 Design Considerations 8x47uF Ext Cap Input Filtering 10x47uF Ext Cap TM The 35A Digital MicroDLynxII module should be 30 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 recommended at the input of the module. Figure 31 10 shows the input ripple voltage for various output voltages at 35A of load current with 4x22 µF, 6x22 µF or 8x22 µF ceramic capacitors and an input of 12V. 0 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3 3.3 400 4x22uF 360 Output Voltage(Volts) 6x22 uF 320 8x22 uF 280 Figure 32. Output ripple voltage for various output voltages with external 8x47 µF or 10x47 µF ceramic 240 capacitors at the output (35A load). Input voltage is 12V. 200 160 120 Safety Considerations 80 40 For safety agency approval the power module must be 0 installed in compliance with the spacing and separation 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3 3.3 requirements of the end-use safety agency standards, i.e., nd ANSI/UL 60950-1 2 Revised October 14, 2014, CSA C22.2 No. 60950-1-07, Second Ed. + A2:2014 (MOD), DIN EN 60950- Output Voltage (Vdc) 1:2006 + A11:2009 + A1:2010 +A12:2011, + A2:2013 Figure 31. Input ripple voltage for various output (VDE0805 Teil 1: 2014-08)(pending). voltages with 4x22 µF, 6x22 µF or 8x22 µF ceramic For the converter output to be considered meeting the capacitors at the input (35A load). Input voltage is 12V. requirements of safety extra-low voltage (SELV), the input Output Filtering must meet SELV requirements. The power module has extra-low voltage (ELV) outputs when all inputs are ELV. An These modules are designed for low output ripple voltage external 40A 461 series Littelfuse fuse model or equivalent is and will meet the maximum output ripple specification with recommended on the ungrounded input lead when the 0.1 µF ceramic and 2x47 µF ceramic capacitors at the input voltage exceeds 8V. For input voltages less than 8V, 2 output of the module. However, additional output filtering parallel 25A 456 series Littelfuse or equivalent are may be required by the system designer for a number of recommended on the ungrounded input lead. 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 32 provides output ripple information for different external capacitance values at various Vo and a full load current of 35A. 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. May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 12 Input Ripple Voltage (mVp-p) Output Ripple (mVp-p) Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current Digital On/Off Analog Feature Descriptions Please see the Digital Feature Descriptions section. Remote On/Off The module can be turned ON and OFF either by using the DLYNXII MODULE 6.5V ON/OFF pin (Analog interface) or through the PMBus interface (Digital). The module can be configured in a 40.2K number of ways through the PMBus interface to react to the two ON/OFF inputs: • Module ON/OFF can be controlled only through I ON/OFF the analog interface (digital interface ON/OFF ENABLE commands are ignored) • Module ON/OFF can be controlled only through the PMBus interface (analog interface is ignored) • Module ON/OFF can be controlled by either the Q1 analog or digital interface GND The default state of the module (as shipped from the factory) is to be controlled by the analog interface only. If the digital interface is to be enabled, or the module is to be controlled only through the digital interface, this change must be made Figure 33. Circuit configuration for using positive On/Off through the PMBus. These changes can be made and logic. written to non-volatile memory on the module so that it is remembered for subsequent use. DLYNXII MODULE Vin Analog On/Off TM The 35A Digital MicroDLynxII power modules feature an R1 On/Off pin for remote On/Off operation. Two On/Off logic options are available. In the Positive Logic On/Off option, (device code suffix “4” – see Ordering Information), the I ON/OFF module turns ON during a logic High on the On/Off pin and ENABLE turns OFF during a logic Low. With the Negative Logic + On/Off option, (no device code suffix, see Ordering 3.09K V ON/OFF Information), the module turns OFF during logic High and ON Q2 during logic Low. The On/Off signal should be always referenced to ground. For either On/Off logic option, leaving _ GND the On/Off pin disconnected will turn the module ON when input voltage is present. Figure 34. Circuit configuration for using negative On/Off For positive logic modules, the circuit configuration for using logic. the On/Off pin is shown in Figure 33. When the external transistor Q1 is in the OFF state, the internal PWM #Enable is pulled up internally, thus turning the module ON. When Monotonic Start-up and Shutdown transistor Q1 is turned ON, the On/Off pin is pulled low, and consequently the internal PWM Enable signal is pulled low The module has monotonic start-up and shutdown behavior and the module is OFF. for any combination of rated input voltage, output current and operating temperature range. For negative logic On/Off modules, the circuit configuration is shown in Fig. 34. The On/Off pin should be pulled high with Startup into Pre-biased Output an external pull-up resistor. When transistor Q2 is in the OFF The module can start into a prebiased output as long as the state, the On/Off pin is pulled high, which pulls the internal ENABLE# High and the module is OFF. To turn the module prebias voltage is 0.5V less than the set output voltage. ON, Q2 is turned ON pulling the On/Off pin low resulting in Analog Output Voltage Programming the PWM ENABLE# pin going Low. The maximum voltage allowed on the On/Off pin is 7V. If Vin is used as a source, The output voltage of the module is programmable to any then a suitable external resistor R1 must be used to ensure voltage from 0.6dc to 3.63Vdc by connecting a resistor that the voltage on the On/Off pin does not exceed 7V between the Trim and SIG_GND pins of the module. Certain restrictions apply on the output voltage set point depending on the input voltage. These are shown in the Output Voltage vs. Input Voltage Set Point Area plot in Fig. 35. The Upper Limit curve shows that for output voltages lower than 1V, the input voltage must be lower than the maximum of 14.4V. The Lower Limit curve shows that for output voltages May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 13 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current higher than 0.6V, the input voltage needs to be larger than Table 1 the minimum of 4.5V. At output voltage of 2.5V, the input V (V) Rtrim (KΩ) O, set voltage should not be below 5Vin and at output voltage of 0.6 Open 3.3V the input voltage should be at least 6Vin. 0.9 40 1.0 30 1.2 20 1.5 13.33 1.8 10 2.5 6.316 3.3 4.444 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 Figure 35. Output Voltage vs. Input Voltage Set Point Area between the sense pins (VS+ and VS-). The voltage drop plot showing limits where the output voltage can be set between the sense pins and the VOUT and GND pins of the for different input voltages. module should not exceed 0.5V. Analog Voltage Margining Output voltage margining can be implemented in the V (+) V (+) IN O module by connecting a resistor, Rmargin-up, from the Trim pin to the ground pin for margining-up the output voltage and VS+ by connecting a resistor, Rmargin-down, from the Trim pin to output pin for margining-down. Figure 37 shows the circuit ON/OFF configuration for output voltage margining. The POL LOAD TRIM Programming Tool or Power Module Wizard(PMW), available at www.gecriticalpower.com under the Downloads section, R trim also calculates the values of Rmargin-up and Rmargin-down for a specific output voltage and % margin. Please consult your SIG_GND local GE technical representative for additional details. VS─ Vo Rmargin-down Caution – Do not connect SIG_GND to GND elsewhere in the MODULE layout Figure 36. Circuit configuration for programming output Q2 voltage using an external resistor. Trim Rmargin-up Without an external resistor between Trim and SIG_GND Rtrim pins, the output of the module will be 0.6Vdc. To calculate the value of the trim resistor, Rtrim for a desired output Q1 voltage, should be as per the following equation: SIG_GND  12  Rtrim  k    Vo 0.6   Figure 37. Circuit Configuration for margining Output Rtrim is the external resistor in kΩ voltage. Vo is the desired output voltage. Table 1 provides Rtrim values required for some common output voltages. May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 14 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current Digital Output Voltage Margining After the 10msec delay, an analog voltage is applied to the Please see the Digital Feature Descriptions section. SEQ pin and the output voltage of the module will track this Output Voltage Sequencing voltage on a one-to-one volt bases until the output reaches the set-point voltage. To initiate simultaneous shutdown of The power module includes a sequencing feature, EZ- the modules, the SEQ pin voltage is lowered in a controlled SEQUENCE that enables users to implement various types of manner. The output voltage of the modules tracks the output voltage sequencing in their applications. This is voltages below their set-point voltages on a one-to-one accomplished via an additional sequencing pin. When not basis. A valid input voltage must be maintained until the using the sequencing feature, leave it unconnected. tracking and output voltages reach ground potential. TM When an analog voltage is applied to the SEQ pin, the When using the EZ-SEQUENCE feature to control start-up output voltage tracks this voltage until the output reaches of the module, pre-bias immunity during start-up is disabled. the set-point voltage. The final value of the SEQ voltage The pre-bias immunity feature of the module relies on the must be set higher than the set-point voltage of the module. module being in the diode-mode during start-up. When TM The output voltage follows the voltage on the SEQ pin on a using the EZ-SEQUENCE feature, modules goes through an one-to-one basis. By connecting multiple modules together, internal set-up time of 10msec, and will be in synchronous multiple modules can track their output voltages to the rectification mode when the voltage at the SEQ pin is applied. voltage applied on the SEQ pin. This will result in the module sinking current if a pre-bias voltage is present at the output of the module. When pre- For proper voltage sequencing, first, input voltage is applied bias immunity during start-up is required, the EZ- to the module. The On/Off pin of the module is left TM SEQUENCE feature must be disabled. For additional unconnected (or tied to GND for negative logic modules or TM guidelines on using the EZ-SEQUENCE feature please refer tied to VIN for positive logic modules) so that the module is to Application Note AN04-008 “Application Guidelines for ON by default. After applying input voltage to the module, a Non-Isolated Converters: Guidelines for Sequencing of minimum 10msec delay is required before applying voltage Multiple Modules”, or contact the GE technical representative on the SEQ pin. This delay gives the module enough time to for additional information. complete its internal power-up soft-start cycle. During the delay time, the SEQ pin should be held close to ground Overcurrent Protection (nominally 50mV ± 20 mV). This is required to keep the To provide protection in a fault (output overload) condition, internal op-amp out of saturation thus preventing output the unit is equipped with internal current-limiting circuitry overshoot during the start of the sequencing ramp. By and can endure current limiting continuously. At the point of selecting resistor R1 (see fig. 38) according to the following current-limit inception, the unit enters hiccup mode. The unit equation operates normally once the output current is brought back into its specified range. 26150 R1 = 4052 ohms, (4.02K Std.) Digital Adjustable Overcurrent Warning 6.5 0.05 Please see the Digital Feature Descriptions section. the voltage at the sequencing pin will be 50mV when the sequencing signal is at zero. Overtemperature Protection MODULE To provide protection in a fault condition, the unit is (6.5V) equipped with a thermal shutdown circuit. The unit will shut down if the over-temperature threshold of 122 (typ) is exceeded at the thermal reference point T .Please refer to ref Electrical characteristic table, over-temperature section on page 5. Once the unit goes into thermal shutdown it will 523K + then wait to cool before attempting to restart. OUT Digital Temperature Status via PMBus R1 Please see the Digital Feature Descriptions section. - SEQ 3.09K Digitally Adjustable Output Over and Under Voltage Protection GND Please see the Digital Feature Descriptions section. Figure 38. Circuit showing connection of the sequencing Input Undervoltage Lockout signal to the SEQ pin. At input voltages below the input undervoltage lockout limit, the module operation is disabled. The module will begin to operate at an input voltage above the undervoltage lockout turn-on threshold. May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 15 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current TM the output of the module. The Tunable Loop is implemented Digitally Adjustable Input Undervoltage Lockout by connecting a series R-C between the VS+ and TRIM pins of Please see the Digital Feature Descriptions section. the module, as shown in Fig. 40. This R-C allows the user to externally adjust the voltage loop feedback compensation of Digitally Adjustable Power Good Thresholds the module. Please see the Digital Feature Descriptions section. VOUT Synchronization VS+ The module switching frequency can be synchronized to a RTune signal with an external frequency within a specified range. Synchronization can be done by using the external signal CO MODULE applied to the SYNC pin of the module as shown in Fig. 39, CTune with the converter being synchronized by the rising edge of the external signal. The Module switches at half the SYNC TRIM frequency. The Electrical Specifications table specifies the requirements of the external SYNC signal. If the SYNC pin is RTrim not used, the module will free run at the default switching frequency. If synchronization is not being used, connect SIG_GND the SYNC pin to SIG_GND. GND MODULE Figure. 40. Circuit diagram showing connection of R TUME and CTUNE to tune the control loop of the module. SYNC + Recommended values of RTUNE and CTUNE for different output capacitor combinations are given in Tables 2 and 3. Table 3 ─ shows the recommended values of R and C for TUNE TUNE SIG_GND different values of ceramic output capacitors up to 1000uF that might be needed for an application to meet output ripple and noise requirements. Selecting RTUNE and CTUNE Figure 39. External source connections to synchronize according to Table 3 will ensure stable operation of the switching frequency of the module. module. In applications with tight output voltage limits in the Measuring Output Current, Output Voltage and presence of dynamic current loading, additional output Temperature capacitance will be required. Table 3 lists recommended Please see the Digital Feature Descriptions section. values of RTUNE and CTUNE in order to meet 2% output voltage deviation limits for some common output voltages Dual Layout in the presence of a 10A to 35A step change (50% of full load), with an input voltage of 12V. Identical dimensions and pin layout of Analog and Digital MicroDLynxII modules permit migration from one to the other Please contact your GE technical representative to obtain without needing to change the layout. In both cases the trim more details of this feature as well as for guidelines on how resistor is connected between trim and signal ground. The to select the right value of external R-C to tune the module output of the analog module cannot be trimmed down to for best transient performance and stable operation for 0.51V other output capacitance values. TM Tunable Loop The module has a feature that optimizes transient response TM of the module called Tunable Loop . Table 2. General recommended values of of RTUNE and External capacitors are usually added to the output of the CTUNE for Vin=12V and various external ceramic capacitor module for two reasons: to reduce output ripple and noise combinations. (see Figure 38) and to reduce output voltage deviations from Co 16x47F 20x47F 24x47F 30x47F 40x47F the steady-state value in the presence of dynamic load current changes. Adding external capacitance however R TUNE 300 300 300 300 300 affects the voltage control loop of the module, typically C TUNE 470pF 560pF 680pF 820pF 1.2nF causing the loop to slow down with sluggish response. Larger values of external capacitance could also cause the module to become unstable. TM The Tunable Loop allows the user to externally adjust the voltage control loop to match the filter network connected to May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 16 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current Table 3. Recommended values of RTUNE and CTUNE to obtain transient deviation of 2% of Vout for a 10A step load with Vin=12V. Vo 3.3V 2.5V 1.8V 1.2V 0.6V 8x47uF + 8x47uF + 8x47uF + 8x47uF + 8x47uF + Co 2x330uF 4x330uF 7x330uF 14x330uF 24x330uF RTUNE 221Ω 221Ω 221Ω 300Ω 300Ω C TUNE 2700pF 3300pF 4700pF 10nF 18nF V 50mV 43mV 32mV 18mV 12mV Note: The capacitors used in the Tunable Loop tables are 47 μF/3 mΩ ESR ceramic and 330 μF/12 mΩ ESR polymer capacitors. Power Module Wizard GE offers a free web based easy to use tool that helps users simulate the Tunable Loop performance of the UJT035. Go to http://ge.transim.com/pmd/Home and sign up for a free account and use the module selector tool. The tool also offers downloadable Simplis/Simetrix models that can be used to assess transient performance, module stability, etc. May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 17 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current either address resistor value is outside the range specified in Digital Feature Descriptions Table 4, the module will respond to address 127. PMBus Interface Capability Table 4 TM The 35A Digital MicroDLynxII power modules have a Digit Resistor Value (KΩ) PMBus interface that supports both communication and 0 11 control. The PMBus Power Management Protocol 1 18.7 Specification can be obtained from www.pmbus.org. The 2 27.4 modules support a subset of version 1.1 of the specification 3 38.3 (see Table 6 for a list of the specific commands supported). Most module parameters can be programmed using PMBus 4 53.6 and stored as defaults for later use. 5 82.5 All communication over the module PMBus interface must 6 127 support the Packet Error Checking (PEC) scheme. The PMBus 7 187 master must generate the correct PEC byte for all transactions, and check the PEC byte returned by the 2 The user must know which I C addresses are reserved in a module. system for special functions and set the address of the The module also supports the SMBALERT# response module to avoid interfering with other system operations. protocol whereby the module can alert the bus master if it Both 100kHz and 400kHz bus speeds are supported by the wants to talk. For more information on the SMBus alert module. Connection for the PMBus interface should follow response protocol, see the System Management Bus the High Power DC specifications given in section 3.1.3 in the (SMBus) specification. SMBus specification V2.0 for the 400kHz bus speed or the Low Power DC specifications in section 3.1.2. The complete The module has non-volatile memory that is used to store SMBus specification is available from the SMBus web site, configuration settings. Not all settings programmed into the smbus.org. device are automatically saved into this non-volatile memory, only those specifically identified as capable of being stored can be saved (see Table 6 for which command ADDR1 parameters can be saved to non-volatile storage). ADDR0 PMBus Data Format For commands that set thresholds, voltages or report such R R ADDR0 ADDR1 quantities, the module supports the “Linear” data format among the three data formats supported by PMBus. The SIG_GND Linear Data Format is a two byte value with an 11-bit, two’s complement mantissa and a 5-bit, two’s complement exponent. The format of the two data bytes is shown below: Figure 41. Circuit showing connection of resistors used to set the PMBus address of the module. Data Byte High Data Byte Low Operation (01h) 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 This is a paged register. The OPERATION command can be use to turn the module on or off in conjunction with the Exponent Mantissa ON/OFF pin input. It is also used to margin up or margin MSB MSB down the output voltage PMBus Enabled On/Off The value is of the number is then given by The module can also be turned on and off via the PMBus Exponent Value = Mantissa x 2 interface. The OPERATION command is used to actually turn the module on and off via the PMBus, while the PMBus Addressing ON_OFF_CONFIG command configures the combination of The power module can be addressed through the PMBus analog ON/OFF pin input and PMBus commands needed to using a device address. The module has 64 possible turn the module on and off. Bit [7] in the OPERATION addresses (0 to 63 in decimal) which can be set using command data byte enables the module, with the following resistors connected from the ADDR0 and ADDR1 pins to functions: GND. Note that some of these addresses (0, 1, 2, 3, 4, 5, 6, 7, 0 : Output is disabled 8, 9, 10, 11 12, 40, 44, 45, 55 in decimal) are reserved 1 : Output is enabled according to the SMBus specifications and may not be useable. The address is set in the form of two octal (0 to 7) This module uses the lower five bits of the ON_OFF_CONFIG digits, with each pin setting one digit. The ADDR1 pin sets data byte to set various ON/OFF options as follows: the high order digit and ADDR0 sets the low order digit. The resistor values suggested for each digit are shown in Table 4 (1% tolerance resistors are recommended). Note that if May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 18 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current Bit Position 4 3 2 1 0 Table 5 Access r/w r/w r/w r/w r Rise Time Exponent Mantissa Function PU CMD CPR POL CPA 600μs 11100 00000001010 Default Value 1 0 1 1 0 900μs 11100 00000001110 1.2ms 11100 00000010011 PU: Sets the default to either operate any time input power 1.8ms 11100 00000011101 is present or for the ON/OFF to be controlled by the analog 2.7ms 11100 00000101011 ON/OFF input and the PMBus OPERATION command. This bit 4.2ms 11100 00001000011 is used together with the CP, CMD and ON bits to determine 6.0ms 11100 00001100000 startup. 9.0ms 11100 00010010000 Bit Value Action Module powers up any time power is 0 present regardless of state of the analog ON/OFF pin Module does not power up until commanded by the analog ON/OFF pin and 1 the OPERATION command as programmed in bits [2:0] of the ON_OFF_CONFIG register. CMD: The CMD bit controls how the device responds to the OPERATION command. Bit Value Action Module ignores the ON bit in the 0 OPERATION command Module responds to the ON bit in the 1 OPERATION command CPR: Sets the response of the analog ON/OFF pin. This bit is used together with the CMD, PU and ON bits to determine startup. Bit Value Action Module ignores the analog ON/OFF pin, i.e. 0 ON/OFF is only controlled through the PMBUS via the OPERATION command Module requires the analog ON/OFF pin to 1 be asserted to start the unit CPA: Sets the action of the analog ON/OFF pin when turning the controller OFF. This bit is internally read and cannot be modified by the user PMBus Adjustable Soft Start Rise Time The soft start rise time can be adjusted in the module via PMBus. When setting this parameter, make sure that the charging current for output capacitors can be delivered by the module in addition to any load current to avoid nuisance tripping of the overcurrent protection circuitry during startup. The TON_RISE command sets the rise time in ms, and allows choosing soft start times between 600μs and 9ms, with possible values listed in Table 5. Note that the exponent is fixed at -4 (decimal) and the upper two bits of the mantissa are also fixed at 0. May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 19 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current • The internal reference voltage is 0.6V. So we need to Output Voltage Adjustment Using the PMBus determine how the 20mV translates to a change in the The VREF_TRIM parameter is important for a number of internal reference voltage. PMBus commands related to output voltage trimming, and • Divider Ratio = Vref/Vout = 0.6/1.8 = 0.33 margining. Each of the 2 output voltages of the module can • Hence a 20mV change at 1.8Vo requires a 0.33x20mV = be set as the combination of the voltage divider formed by 6.6mV change in the reference voltage. RTrim and a 20kΩ upper divider resistor inside the module, • Vref(offset) = - (6.6)/1000 = - 0.0066 Volts (- sign since and the internal reference voltage of the module. The we are trimming down) reference voltage VREF is be nominally set at 600mV, and the -9 • Vref(offset) = Vref_Trim x 2 output regulation voltage is then given by: • Vref_Trim = Vref(offset) x 512 • Vref_Trim = -0.0066 x 512 = -3.3 = -3 (rounded to nearest 20000 RTrim   integer V   V OUT REF   RTrim   Output Voltage Margining Using the PMBus Hence the module output voltage is dependent on the value The module can also have its output margined via PMBus of RTrim which is connected external to the module. commands. The command STEP_VREF_MARGIN_HIGH will set the margin high voltage, while the command The VREF_TRIM parameter is used to apply a fixed offset STEP_VREF_MARGIN_LOW sets the margin low voltage. Both voltage to the reference voltage can be specified using the the STEP_VREF_MARGIN_HIGH and “Linear” format and two bytes. The exponent is fixed at –9 STEP_VREF_MARGIN_LOW commands will use the “Linear” (decimal). The resolution of the adjustment is 7 bits, with a mode with the exponent fixed at –9 (decimal). Two bytes are resulting step size of approximately 0.4%. The maximum used for the mantissa with the upper bit [7] of the high byte trim range is -20% to +10% of the nominal reference fixed at 0. The actual margined output voltage is a voltage(600mV) in 2mV steps. Possible values range from - combination of the STEP_VREF_MARGIN_HIGH or 120mV to +60mV. The exception is at 0.6Vout where the STEP_VREF_MARGIN_LOW and the VREF_TRIM values as allowable trim range is only -90mV to +60mV to prevent the shown below. The net permissible voltage range change is - module from operating at lower than 0.51Vdc. When 30% to +10% for the margin high command and -20% to trimming the voltage below 0.6V, the module max. input 0% for the margin low command voltage operating point also reduces proportionally. As shown earlier in Fig.41, the maximum permissible input V  REF ( MH ) voltage is 13V. For any voltage trimmed below 0.6V, the 9 ( STEP _ VREF _ MARGIN _ HIGH VREF _ TRIM ) 2 maximum input voltage will have to be reduced by the same factor. Applications Example For a design where the output voltage is 1.2V and the output When PMBus commands are used to trim or margin the needs to be trimmed up by 100mV (within 10% of Vo). output voltage, the value of V is what is changed inside REF • The internal reference voltage is 0.6V. So we need to the module, which in turn changes the regulated output determine how the 100mV translates to a change in the voltage of the module. internal reference voltage. • Divider Ratio = Vref/Vout = 0.6/1.2 = 0.5 The nominal output voltage of the module is adjustable with a minimum step size of 0.4% over a +10% to -20% range • Hence a 100mV change at 1.2Vo requires a 0.5x100mV = from nominal using the VREF_TRIM command over the 50mV change in the reference voltage. PMBus. • V = (50)/1000 = 0.05 Volts REF(MH) -9 • VREF(MH) = (Step_Vref_margin_high + Vref_trim) x 2 The VREF_TRIM command can be used to apply a fixed • Assume V = 0 here ref_Trim offset voltage to either of the output voltage command • Step_V = V x 512 ref_margin_high REF(MH) value using the “Linear” mode with the exponent fixed at –9 • Step_V = 0.05 x 25.6 = 26 (rounded to nearest ref_margin_high (decimal). The value of the offset voltage is given by integer 9 V  VREF _ TR IM2 REF ( o ffset) V  REF ( ML) This offset voltage is added to the voltage set through the 9 ( STEP _ VREF _ MARGIN _ LOW VREF _ TRIM ) 2 divider ratio and nominal VREF to produce the trimmed Applications Example output voltage. If a value outside of the +10%/-20% For a design where the output voltage is 1.8V and the output adjustment range is given with this command, the module needs to be trimmed down by 100mV (within -20% of Vo). will set it’s output voltage to the upper or lower limit value • The internal reference voltage is 0.6V. So we need to (as if VOUT_TRIM, assert SMBALRT#, set the CML bit in determine how the 100mV translates to a change in the STATUS_BYTE and the invalid data bit in STATUS_CML. internal reference voltage. • Divider Ratio = Vref/Vout = 0.6/1.8 = 0.33 Applications Example • Hence a 100mV change at 1.2Vo requires a 0.33x100mV = For a design where the output voltage is 1.8V and the output 33mV change in the reference voltage. needs to be trimmed down by 20mV. • V = -(33)/1000 = - 0.033 Volts (- sign since we are REF(MH) margining down) May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 20 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current -9 of regulation occurs that would result in the output voltage • VREF(ML) = (Step_Vref_margin_low + Vref_trim) x 2 going outside the specified thresholds. The PGOOD • Assume Vref_Trim = - 3 here (from V Ref_Trim example thresholds are user selectable via the PMBus (the default earlier) values are as shown in the Feature Specifications Section). • Step_V = V x 512 - V ref_margin_low REF(ML) ref_trim Each threshold is set up symmetrically above and below the • Step_V = -0.033 x 512 – (-3) = -16.9+3 = -13.9 = ref_margin_low nominal value. The PGL (POWERGOODLOW) command will -14 (rounded to nearest integer set the output voltage level above which PGOOD is asserted (lower threshold). The PGH(POWERGOODHIGH) command will set the level above which the PGOOD command is de- The module will support the margined high or low voltages asserted. This command will also set two thresholds using the OPERATION command. Bits [5:2] are used to symmetrically placed around the nominal output voltage. enable margining as follows: Normally, the PGL threshold is set higher than the PGH • 00XX : Margin Off threshold. • 0101 : Margin Low (Act on Fault) The PGOOD terminal can be connected through a pullup • 0110 : Margin Low (Act on Fault) resistor (suggested value 100K) to a source of 5VDC or • 1001 : Margin High (Act on Fault) lower. The current through the PGood terminal should be • 1010 : Margin High (Act on Fault) limited to a max value of 5mA PMBus Adjustable Input Undervoltage Lockout PMBus Adjustable Overcurrent Warning The module allows for adjustment of the input under voltage lockout and hysteresis. The command VIN_ON allows setting The module can provide an overcurrent warning via the the input voltage turn on threshold for each output, while PMBus. The threshold for the overcurrent warning can be the VIN_OFF command will set the input voltage turn off set using the parameter IOUT_OC_WARN_LIMIT. This threshold. For the VIN_ON command, possible values are command uses the “Linear” data format with a two byte 4.25V to 16V in variable steps. For the VIN_OFF command, data word where the upper five bits [7:3] of the high byte possible values are 4V to 15.75V in 0.5V steps. If other values represent the exponent and the remaining three bits of the are entered for either command, they is mapped to the high byte [2:0] and the eight bits in the low byte represent closest of the allowed values. the mantissa. The exponent is fixed at –1 (decimal). The upper five bits of the mantissa are fixed at 0 while the lower Both the VIN_ON and VIN_OFF commands use the “Linear” six bits are programmable with a default value of 19A format with two data bytes. The upper five bits will represent (decimal). The resolution of this warning limit is 500mA. The the exponent (fixed at -2) and the remaining 11 bits will value of the IOUT_OC_WARN_LIMIT can be stored to non- represent the mantissa. For the mantissa, the four most volatile memory using the STORE_DEFAULT_ALL command significant bits are fixed at 0. Temperature Status via PMBus Measurement of Output Current and Voltage The module will provide information related to temperature The module is capable of measuring key module of the module through the READ_TEMPERATURE_2 parameters such as output current and voltage and command. The command returns external temperature in providing this information through the PMBus interface. degrees Celsius. This command will use the “Linear” data format with a two byte data word where the upper five bits Measuring Output Current Using the PMBus [7:3] of the high byte will represent the exponent and the The module measures current by using the inductor winding remaining three bits of the high byte [2:0] and the eight bits resistance as a current sense element. The inductor winding in the low byte will represent the mantissa. The exponent is resistance is then the current gain factor used to scale the fixed at 0 (decimal). The lower 11 bits are the result of the measured voltage into a current reading. This gain factor is ADC conversion of the external temperature the argument of the IOUT_CAL_GAIN command, and consists of two bytes in the linear data format. The exponent PMBus Adjustable Output Over, Under Voltage uses the upper five bits [7:3] of the high data byte in two-s Protection and Power Good complement format and is fixed at –4 (decimal). The The module has a common command to set the PGOOD, remaining 11 bits in two’s complement binary format VOUT_UNDER_VOLTAGE(UV) and VOUT_OVER_VOLTAGE (OV) represent the mantissa. During manufacture, each module limits as a percentage of nominal. Refer to Table 6 of the is calibrated by measuring and storing the current gain next section for the available settings. The PMBus command factor into non-volatile storage. DONOT CHANGE THE VOUT_OVER_VOLTAGE (OV) is used to set the output over FACTORY PROGRAMMED VALUE. voltage threshold from two possible values: +12.5% or +16.67% of the commanded output voltage for each output. The current measurement accuracy is also improved by The module provides a Power Good (PGOOD) that is each module being calibrated during manufacture with the offset in the current reading. The IOUT_CAL_OFFSET implemented with an open-drain output to indicate that the output voltage is within the regulation limits of the power command is used to store and read the current offset. The argument for this command consists of two bytes module. The PGOOD signal is de-asserted to a low state if any condition such as overtemperature, overcurrent or loss composed of a 5-bit exponent (fixed at -4d) and a 11-bit May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 21 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current mantissa. This command has a resolution of 62.5mA and a Bit Default Flag range of -4000mA to +3937.5mA. DONOT CHANGE THE Position Value FACTORY PROGRAMMED VALUE. 7 VOUT fault or warning 0 6 IOUT fault or warning 0 The READ_IOUT command provides module average output 5 X 0 current information. This command only supports positive or 4 MFR 0 current sourced from the module. If the converter is sinking 3 POWER_GOOD# (is negated) 0 current a reading of 0 is provided. The READ_IOUT 2 X 0 command returns two bytes of data in the linear data 1 X 0 format. The resolution of the command is 62.5mA. The 0 X 0 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 STATUS_VOUT : Returns one byte of information relating to remaining 11 bits in two’s complement binary format the status of the module’s output voltage related faults. th represent the mantissa with the 11 bit fixed at 0 since only positive numbers are considered valid. Bit Default Flag Position Value Measuring Output Voltage Using the PMBus 7 VOUT OV Fault 0 The module provides output voltage information using the 6 X 0 READ_VOUT command for each output. In this module the 5 X 0 output voltage is sensed at the remote sense amplifier 4 VOUT UV Fault 0 output pin so voltage drop to the load is not accounted for. 3 X 0 The command will return two bytes of data all representing 2 X 0 the mantissa while the exponent is fixed at -9 (decimal). 1 X 0 0 X 0 Reading the Status of the Module using the PMBus STATUS_IOUT : Returns one byte of information relating to The module supports a number of status information the status of the module’s output voltage related faults. commands implemented in PMBus. However, not all features are supported in these commands. A 1 in the bit Bit Default Flag position indicates the fault that is flagged. Position Value 7 IOUT OC Fault 0 6 X 0 STATUS_BYTE : Returns one byte of information with a 5 IOUT OC Warning 0 summary of the most critical device faults. 4 X 0 Bit Default Flag 3 X 0 Position Value 7 X 0 2 X 0 1 X 0 6 OFF 0 0 X 0 5 VOUT Overvoltage 0 4 IOUT Overcurrent 0 3 VIN Undervoltage 0 STATUS_TEMPERATURE : Returns one byte of information 2 Temperature 0 relating to the status of the module’s temperature related faults. 1 CML (Comm. Memory Fault) 0 0 None of the above 0 Bit Default Flag Position Value STATUS_WORD : Returns two bytes of information with a 7 OT Fault 0 summary of the module’s fault/warning conditions. 6 OT Warning 0 Low Byte 5 X 0 Bit Default Flag 4 X 0 Position Value 3 X 0 7 X 0 2 X 0 6 OFF 0 5 VOUT Overvoltage 0 1 X 0 4 IOUT Overcurrent 0 0 X 0 3 VIN Undervoltage 0 2 Temperature 0 STATUS_CML : Returns one byte of information relating to 1 CML (Comm. Memory Fault) 0 the status of the module’s communication related faults. 0 None of the above 0 Bit Default Flag Position Value High Byte 7 Invalid/Unsupported Command 0 May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 22 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current 6 Invalid/Unsupported Command 0 5 Packet Error Check Failed 0 4 Memory Fault Detected 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 and revision number. Bits [7:2] in the Low Byte indicate the module type (010011 corresponds to the UJT035 series of module), while bits [7:3] indicate the revision number of the module. Low Byte Bit Default Flag Position Value 7:2 Module Name 010011 1:0 Reserved 10 High Byte Bit Default Flag Position Value 7:3 Module Revision Number None 2:0 Reserved 000 May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 23 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A 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 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 01 OPERATION Bit 7: 0 Output switching disabled 1 Output switching enabled Margin: 00XX Margin Off 0101 Margin Low ( Act on fault) 0110 Margin Low (Act on fault) 1001 Margin High (Act on fault) 1010 Margin High (Act on fault) Configures the ON/OFF functionality as a combination of analog ON/OFF pin and PMBus commands Format Unsigned Binary Bit Position 7 6 5 4 3 2 1 0 02 ON_OFF_CONFIG 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 0 Refer to Page 19 for details on pu, cmd, cpr, pol and cpa Clear any fault bits that may have been set, also releases the SMBALERT# signal 03 CLEAR_FAULTS if 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, PAGE 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, PAGE 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) Stores all of the current storable register settings in the EEPROM memory as the 15 STORE_USER_ALL new defaults on power up Restores all of the storable register settings from the non-volatile memory 16 RESTORE_USER_ALL (EEPROM). The command should not be used while the device is actively switching This command helps the host system/GUI/CLI determine key capabilities of the module Format Unsigned Binary Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r 19 CAPABILITY Function PEC SPD ALRT Reserved Default Value 1 0 1 1 0 0 0 0 PEC – 1 Supported SPD -01 – max of 400kHZ ALRT – 1 – SMBALERT# supported May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 24 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current Hex Non-Volatile Command Brief Description Code Memory Storage 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 Access r r r r r r r r 20 VOUT_MODE Function Mode Exponent Default Value 0 0 0 1 0 1 1 1 Mode: Value fixed at 000, linear mode Exponent: Value fixed at 10111, Exponent for linear mode values is -9 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 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 1 0 0 0 1 35 VIN_ON YES Exponent -2 (dec), fixed Mantissa The upper four bits are fixed at 0 The lower seven are programmable with a default value of 9(dec). This corresponds to a default of 4.25V. Allowable values are • 4.25, in steps of 0.25V upto 9.5V. • 9.5V to 13V in increments of 0.5V • 13V to 16V in increments of 1V 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 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 1 0 0 0 0 Exponent -2 (dec), fixed 36 VIN_OFF YES Mantissa The upper four bits are fixed at 0 The lower seven are programmable with a default value of 8(dec). This corresponds to a default of 4.0V. Allowable values are • 4.00, in steps of 0.25V upto 9.75V. • 10.25V to 11.75V in increments of 0.5V • 12V • 13.75V to 16.75V in increments of 1V 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 Exponent Mantissa 38 IOUT_CAL_GAIN YES Default Value 1 0 0 0 1 0 0 V 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 May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 25 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current Hex Non-Volatile Command Brief Description Code Memory Storage Returns the value of the offset correction 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 Function Exponent Mantissa 39 IOUT_CAL_OFFSET YES Default Value 1 1 1 0 0 V V 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 V: Variable based on factory calibration 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 YES IOUT_OC_FAULT_LIMIT 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 0 1 1 0 1 0 Value maybe locked Determines module action in response to an IOU_OC_FAULT_LIMIT or a VOUT undervoltage (UV) fault Format Unsigned Binary Bit Position 7 6 5 4 3 2 1 0 Access r r r/w r/w r/w r r r RS RS RS Function X X x X X [2] [1] [0] 47 IOUT_OC_FAULT_RESPONSE YES Default Value 0 0 1 1 1 1 0 0 RS[2:0] – Retry Setting 000 Unit does not attempt to restart 111 Unit goes through normal soft start continuously Any other value is not acceptable Sets the output overcurrent warning level in A. Must be lower than IOUT_OC_FAULT_LIMIT 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 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 0 0 1 0 1 0 Sets the overtemperature fault level in °C 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 4F OT_FAULT_LIMIT 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 Mantissa Default Value 0 1 1 1 1 0 1 0 Value may be locked Table 6 (Continued) May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 26 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current Hex Non-Volatile Command Brief Description Code Memory Storage Sets the over temperature warning level in °C. Must be lower than OT_FAULT_LIMIT 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 51 YES OT_WARN_LIMIT 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 Mantissa Default Value 0 1 1 0 1 0 0 1 Sets the rise time of the output voltage during startup. Supported Values – 0.6, 0.9, 1.2, 1.8, 2.7, 4.2, 6.0, 9.0msec. Value of 0 instructs unit to bring its output to programmed value as quickly as possible 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 61 TON_RISE YES Function Exponent Mantissa 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 1 0 0 0 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 Access r r r r r r r r 78 STATUS_BYTE None VOUT IOUT_ VIN_U Flag X OFF TEMP CML of the _OV OC V Above 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/P Flag VOUT X MFR PGOOD X X X OUT 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 None of VOUT_ IOUT_O Flag X OFF VIN_UV TEMP CML the OV C above Default Value 0 X 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 7B STATUS_IOUT Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r Flag IOUT_OC Fault X IOUT OC Warning X X X X X Default Value 0 0 0 0 0 0 0 0 May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 27 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current 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 7D STATUS_TEMPERATURE Bit Position 7 6 5 4 3 2 1 0 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 Access r r r r r r r r 7E STATUS_CML Memory Other Invalid Invalid PEC Flag fault X X Comm X Command Data Fail detected Fault Default Value 0 0 0 0 0 0 0 0 Returns one byte of information with the status of the module specific faults or warning Format Unsigned Binary Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r R 80 STATUS_MFR_SPECIFIC Flag OTFI x X IVADDR X X X TWOPH_EN Default Value 0 0 0 0 0 0 0 0 OTFI – Internal Temperature above Thermal Shutdown threshold IVADDR – PMBUs address is not valid TWOPH_EN – Module is in 2 phase mode Returns the value of the output voltage of the module. Exponent is fixed at -9. 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 V V V Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r Function Mantissa Default Value V V V V V V V 0 V - Variable May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 28 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current Table 6 (Continued) Hex Non-Volatile Command Brief Description Code Memory Storage Returns the value of the external temperature in degree Celsius 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 8E READ_TEMPERATURE_2 Default Value 0 0 0 0 0 V V V Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r r Function Mantissa Default Value V V V V V V V 0 V - Variable Returns one byte indicating the module is compliant to PMBus Spec. 1.1 (read only) Format Unsigned Binary Bit Position 7 6 5 4 3 2 1 0 98 PMBUS_REVISION Access r r r r r r r r Default Value 0 0 0 1 0 0 0 1 Returns module name information 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 1 0 0 1 1 0 0 Applies a fixed offset to the reference voltage. Max trim range is -20% to +10% in 2mV steps. Permissible values range between -120mV and +60mV. The offset is calculated -9 as VREF_TRIMx2 . Exponent fixed at -9(dec) 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 VREF_TRIM YES Function Mantissa Default Value V V V V V V V 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 V V V V V V V V Applies a fixed offset to the reference voltage. Adjustment is 0% to +10% in 2mV steps. Permissible values range between 0mV and +60mV. The offset is calculated as -9 (STEP_VREF_MARGIN_HIGH + VREF_TRIM)x2 . Exponent fixed at -9(dec). Net output voltage includes VREF_TRIM adjustment and ranges from -30% to 10% Format Linear, two’s complement binary Bit Position 7 6 5 4 3 2 1 0 D5 STEP_VREF_MARGIN_HIGH Access r r r r r r r r YES Function Mantissa Default Value V V V V V V V 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 May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 29 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current Table 6 (Continued) Non-Volatile Hex Command Brief Description Memory Code Storage Applies a fixed negative offset to the reference voltage. Adjustment is -20% to 0% in 2mV steps. Permissible values range between -120mV and 0mV) The offset is calculated as -9 (STEP_VREF_MARGIN_LOW + VREF_TRIM)x2 .Exponent fixed at -9(dec). Net output voltage includes VREF_TRIM adjustment and ranges from -30% to 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 D6 STEP_VREF_MARGIN_LOW YES Function Mantissa Default Value V V V V V V V 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 V V V V V V V V Single command to set PGOOD, VOUT_UNDER_VOLTAGE(UV) and VOUT_OVER_VOLTAGE(OV) limits as percentage of nominal Format Unsigned Binary Bit Position 7 6 5 4 3 2 1 0 Access r r r r r r r/w r/w PCT_ PCT_ Function X X X X X X MSB LSB Default Value 0 X X X X X 0 0 D7 PCT_VOUT_FAULT_PG_LIMIT PAGE Command Truth Table PCT_M PCT_LS UV (%) PGL PGL PGH PGH OV (%) SB B LOW HIGH HIGH LOW (%) (%) (%) (%) 0 0 -16.67 -12.5 -8.33 12.5 8.33 16.67 0 1 -12.5 -8.33 -4.17 8.33 4.17 12.5 1 0 -29.17 -20.83 -16.67 8.33 4.17 12.5 1 1 -41.67 -37.5 -33.33 8.33 4.17 12.5 Used to set delay to turn-on or turn-off modules as a ratio of TON_RISE. Values can range from 0 to 7 and are a multiple of TON_RISE TIME Format Unsigned Binary Bit Position 7 6 5 4 3 2 1 0 D8 SEQUENCE_TON_TOFF_DELAY Access r/w r/w r/w r r/w r/w r/w r Function TON_DELAY TOFF_DELAY Default Value 0 0 0 0 0 0 0 0 Digital Power Insight (DPI) GE offers a software tool that set helps users evaluate and simulate the PMBus performance of the UJT035 modules without the need to write software. The software can be downloaded for free at http://go.ge-energy.com/DigitalPowerInsight.html. A GE USB to I2C adapter and associated cable set are required for proper functioning of the software suite. For first time users, the GE DPI Evaluation Kit can be purchased from leading distributors at a nominal price and can be used across the entire range of GE Digital POL Module. May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 30 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current Thermal Considerations The thermal reference point, T used in the specifications is ref Power modules operate in a variety of thermal shown in Figure 43. For reliable operation, the temperature at environments; however, sufficient cooling should always be o this points should not exceed 115 C. The output power of the provided to help ensure reliable operation. module should not exceed the rated power of the module Considerations include ambient temperature, airflow, (Vo,set x Io,max). module power dissipation, and the need for increased Please refer to the Application Note “Thermal reliability. A reduction in the operating temperature of the Characterization Process For Open-Frame Board-Mounted module will result in an increase in reliability. The thermal Power Modules” for a detailed discussion of thermal data presented here is based on physical measurements aspects including maximum device temperatures. taken in a wind tunnel. The test set-up is shown in Figure 42. The preferred airflow direction for the module is in Figure 43. 25.4_ Wind Tunnel (1.0) PWBs Power Module Figure 43. Preferred airflow direction and location of hot- spot of the module (Tref). 76.2_ (3.0) x Probe Location for measuring 12.7_ airflow and (0.50) ambient temperature Air flow Figure 42. Thermal Test Setup. May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 31 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current Example Application Circuit Requirements: Vin: 12V Vout: 1.8V Iout: 26A max., worst case load transient is from 17.5A to 26A Vout: 1.5% of Vout (27mV) for worst case load transient Vin, ripple 1.5% of Vin (180mV, p-p) Vout+ Vin+ VIN VOUT VS+ PGOOD RTUNE MODULE SEQ CTUNE CLK TRIM CI3 CI2 CI1 CO3 CO1 CO2 DATA ADDR0 SMBALRT# RTrim ADDR1 ON/OFF SYNC RADDR1 RADDR0 SIG_GND GND VS- GND CI1 Decoupling caps - 1x0.047F/16V 0402 or 0306ceramic capacitor (e.g. Murata LLL185R71C473MA01) + 1x0.1uF/16V 0402 ceramic cpacitor CI2 6x22F/16V ceramic capacitor (e.g. Murata GRM32ER61C226KE20) CI3 47F/16V bulk electrolytic CO1 Decoupling cap - 1x0.047F/16V ceramic capacitor (e.g. Murata LLL185R71C473MA01) + 1x0.1uF/16V 0402 ceramic cpacitor CO2 8 x 47uF/6.3V 1210 ceramic capacitor CO3 4 x 330uF/6V POSCAP CTune 3300pF ceramic capacitor (can be 1206, 0805 or 0603 size) RTune 300Ω 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. May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 32 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A 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.) PIN FUNCTION PIN FUNCTION 2 1 ON/OFF 10 SYNC 2 VIN 11 CLK 3 SEQ 12 DATA 4 GND 13 SMBALERT# 5 TRIM 14 SIG_GND 6 VOUT 15 ADDR1 7 VS+ 16 ADDR0 8 VS- 17 INPUT_GND 9 PG 1 If unused, connect to SIG_GND May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 33 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A 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 2 1 ON/OFF 10 SYNC 2 VIN 11 CLK 3 SEQ 12 DATA 4 GND 13 SMBALERT# 5 TRIM 14 SIG_GND 6 VOUT 15 ADDR1 7 VS+ 16 ADDR0 8 VS- 17 INPUT_GND 9 PG 2 If unused, connect to SIG_GND. May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 34 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current Packaging Details TM The 12V Digital MicroDLynxII 35A modules are supplied in tape & reel as standard. Modules are shipped in quantities of 200 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: 44.00 mm (1.732”) May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 35 Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current Devices). Moisture barrier bags (MBB) with desiccant are Surface Mount Information required for MSL ratings of 2 or greater. These sealed Pick and Place packages should not be broken until time of use. Once the original package is broken, the floor life of the product at TM The 35A Digital MicroDLynxII modules use an open frame conditions of  30°C and 60% relative humidity varies construction and are designed for a fully automated according to the MSL rating (see J-STD-033A). The shelf life assembly process. The modules are fitted with a label for dry packed SMT packages will be a minimum of 12 designed to provide a large surface area for pick and place months from the bag seal date, when stored at the following operations. The label meets all the requirements for surface conditions: < 40° C, < 90% relative humidity. mount processing, as well as safety standards, and is able o 300 to withstand reflow temperatures of up to 300 C. The label Per J-STD-020 Rev. D also carries product information such as product code, Peak Temp 260°C 250 serial number and the location of manufacture. Cooling 200 Nozzle Recommendations Zone * Min. Time Above 235°C 15 Seconds The module weight has been kept to a minimum by using 150 Heating Zone *Time Above 217°C open frame construction. Variables such as nozzle size, tip 1°C/Second 60 Seconds 100 style, vacuum pressure and placement speed should be considered to optimize this process. The minimum 50 recommended inside nozzle diameter for reliable operation is 3mm. The maximum nozzle outer diameter, which will 0 safely fit within the allowable component spacing, is 7 mm. Reflow Time (Seconds) Bottom Side / First Side Assembly Figure 44. Recommended linear reflow profile using Sn/Ag/Cu solder. This module is not recommended for assembly on the bottom side of a customer board. If such an assembly is Post Solder Cleaning and Drying Considerations attempted, components may fall off the module during the second reflow process. Post solder cleaning is usually the final circuit-board assembly process prior to electrical board testing. The result Lead Free Soldering of inadequate cleaning and drying can affect both the The modules are lead-free (Pb-free) and RoHS compliant reliability of a power module and the testability of the and fully compatible in a Pb-free soldering process. Failure finished circuit-board assembly. For guidance on to observe the instructions below may result in the failure of appropriate soldering, cleaning and drying procedures, refer or cause damage to the modules and can adversely affect to Board Mounted Power Modules: Soldering and Cleaning long-term reliability. Application Note (AN04-001). 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). For questions regarding Land grid array(LGA) soldering, solder volume; please contact GE for special manufacturing process instructions. The recommended linear reflow profile using Sn/Ag/Cu solder is shown in Fig. 44. Soldering outside of the recommended profile requires testing to verify results and performance. MSL Rating TM The 35A Digital MicroDLynxII 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 May 10, 2018 ©2017 General Electric Company. All rights reserved. Page 36 Reflow Temp (°C) Data Sheet GE TM 35A Digital MicroDLynxII : Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.51Vdc to 3.63Vdc output; 35A Output Current Ordering Information Please contact your GE Sales Representative for pricing, availability and optional features. Table 9. Device Codes Input Output Output On/Off Device Code Sequencing Comcodes Voltage Range Voltage Current Logic UJT035A0X3-SRZ 4.5 – 14.4Vdc 0.51 – 3.63Vdc 35A Negative Yes 150047126 UJT035A0X43-SRZ 4.5 – 14.4Vdc 0.51 – 3.63Vdc 35A Positive Yes 150047127 -Z refers to RoHS compliant parts Table 10. Coding Scheme Package Family Sequencing Output Output On/Off Remote ROHS Identifier Option current voltage logic Sense Options Compliance U J T 035A0 X 3 -SR Z P=Pico J=DLynx T=with EZ 35A X = 4 = 3 = S = No entry = Z = ROHS6 II Digital Sequence programm positive Remote Surface Standard U=Micro able output Sense Mount K = X=without No entry M=Mega DLynxII sequencing = R = Analog. negative Tape & G=Giga Reel GE 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: +1 888 546 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. May 10, 2018 ©2017 General Electric Company. All International rights reserved. Version 1.9