Data Sheet GE TM Austin MicroLynx : SIP Non-Isolated DC-DC Power Modules 3Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current Features RoHS Compliant  Compliant to RoHS EU Directive 2011/65/EU (-Z versions)  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 product will no longer be RoHS compliant (non-Z versions)  Delivers up to 5A output current  High efficiency – 94% at 3.3V full load (V = 5.0V) IN  Small size and low profile: 22.9 mm x 10.2 mm x 6.66 mm (0.9 in x 0.4 in x 0.262 in) Applications  Low output ripple and noise  Distributed power architectures  High Reliability:  Intermediate bus voltage applications o Calculated MTBF = 19M hours at 25 C Full-load  Telecommunications equipment  Output voltage programmable from 0.75 Vdc to  Servers and storage applications 3.63Vdc via external resistor  Networking equipment  Line Regulation: 0.3% (typical)  Enterprise Networks  Load Regulation: 0.4% (typical)  Latest generation IC’s (DSP, FPGA, ASIC) and Microprocessor  Temperature Regulation: 0.4 % (typical) powered applications  Remote On/Off  Output overcurrent protection (non-latching)  Wide operating temperature range (-40°C to 85°C) †  UL* 60950-1Recognized, CSA C22.2 No. 60950-1- ‡ 03 Certified, and VDE 0805:2001-12 (EN60950-1) Licensed  ISO** 9001 and ISO 14001 certified manufacturing facilities Description TM Austin MicroLynx SIP (single in-line package) power modules are non-isolated dc-dc converters that can deliver up to 5A of output current with full load efficiency of 94% at 3.63V output. These modules provide precisely regulated output voltage programmable via external resistor from 0.75Vdc to 3.63Vdc over a wide range of input voltage (V = 3.0 – 5.5V). Their open-frame IN construction and small footprint enable designers to develop cost- and space-efficient solutions. Standard features include remote On/Off, programmable output voltage and overcurrent protection. * 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 September 25, 2015 ©2015 General Electric Company. All rights reserved. Data Sheet GE TM Austin MicroLynx : SIP Non-Isolated DC-DC Power Modules 3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A 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 5.8 Vdc Continuous Operating Ambient Temperature All TA -40 85 °C (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 3.0 - 5.5 Vdc Maximum Input Current All IIN,max 5.0 Adc (VIN= VIN, min to VIN, max, IO=IO, max ) Input No Load Current V = 0.75 Vdc I 20 mA O,set IN,No load (V = V , Io = 0, module enabled) V = 3.3Vdc I 45 mA IN IN, nom O,set IN,No load Input Stand-by Current All IIN,stand-by 0.6 mA (V = V , module disabled) IN IN, nom 2 2 Inrush Transient All I t 0.04 A s Input Reflected Ripple Current, peak-to-peak (5Hz to 20MHz, 1μH source impedance; V to V All 35 mAp-p IN, min IN, max, IO= IOmax ; See Test configuration section) Input Ripple Rejection (120Hz) All 30 dB CAUTION: This power module is not internally fused. An input line fuse must always be used. This power module can be used in a wide variety of applications, ranging from simple standalone operation to being part of a complex power architecture. To preserve maximum flexibility, internal fusing is not included, however, to achieve maximum safety and system protection, always use an input line fuse. The safety agencies require a fast-acting fuse with a maximum rating of 6 A (see Safety Considerations section). Based on the information provided in this data sheet on inrush energy and maximum dc input current, the same type of fuse with a lower rating can be used. Refer to the fuse manufacturer’s data sheet for further information. September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 2 Data Sheet GE TM Austin MicroLynx : SIP Non-Isolated DC-DC Power Modules 3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current Electrical Specifications (continued) Parameter Device Symbol Min Typ Max Unit Output Voltage Set-point All V -2.0 V +2.0 % V O, set O, set O, set (VIN=IN, min, IO=IO, max, TA=25°C) Output Voltage All V -3% +3.% % V O, set  O, set (Over all operating input voltage, resistive load, and temperature conditions until end of life) Adjustment Range All VO 0.7525 3.63 Vdc Selected by an external resistor Output Regulation Line (V =V to V ) All 0.3 % V IN IN, min IN, max   O, set Load (I =I to I ) All 0.4 % V O O, min O, max   O, set Temperature (T =T to T ) All 0.4 % V ref A, min A, max   O, set Output Ripple and Noise on nominal output (V =V and I =I to I IN IN, nom O O, min O, max Cout = 1μF ceramic//10μFtantalum capacitors) RMS (5Hz to 20MHz bandwidth) All  10 15 mVrms Peak-to-Peak (5Hz to 20MHz bandwidth) All  40 50 mVpk-pk External Capacitance ESR ≥ 1 mΩ All CO, max   1000 μF ESR ≥ 10 mΩ All CO, max   3000 μF Output Current All I 0 5 Adc o Output Current Limit Inception (Hiccup Mode ) All I  220  % I O, lim o (V = 90% of V ) O O, set Output Short-Circuit Current All IO, s/c  2  Adc (VO≤250mV) ( Hiccup Mode ) VO,set = Efficiency η 79.0 % 0.75Vdc V = V , T =25°C V = 1.2Vdc η 85.0 % IN IN, nom A O, set I =I V = V V = 1.5Vdc η 87.0 % O O, max , O O,set O,set V = 1.8Vdc η 88.5 % O,set V = 2.5Vdc η 92.0 % O,set V = 3.3Vdc η 94.0 % O,set Switching Frequency All fsw  300  kHz Dynamic Load Response All V 130 mV (dIo/dt=2.5A/µs; VIN = VIN, nom; TA=25°C) pk   Load Change from Io= 50% to 100% of Io,max; 1μF ceramic// 10 μF tantalum Peak Deviation Settling Time (Vo<10% peak deviation) All t s  25  µs (dIo/dt=2.5A/µs; VIN = VIN, nom; TA=25°C) All Vpk  130  mV Load Change from Io= 100% to 50%of Io,max: 1μF ceramic// 10 μF tantalum Peak Deviation Settling Time (Vo<10% peak deviation) All t 25 s   µs September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 3 Data Sheet GE TM Austin MicroLynx : SIP Non-Isolated DC-DC Power Modules 3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current Electrical Specifications (continued) Parameter Device Symbol Min Typ Max Unit Dynamic Load Response All V 50 mV (dIo/dt=2.5A/µs; V VIN = VIN, nom; TA=25°C) pk   Load Change from Io= 50% to 100% of Io,max; Co = 2x150 μF polymer capacitors Peak Deviation Settling Time (Vo<10% peak deviation) All ts  50  µs (dIo/dt=2.5A/µs; VIN = VIN, nom; TA=25°C) All Vpk  50  mV Load Change from Io= 100% to 50%of Io,max: Co = 2x150 μF polymer capacitors Peak Deviation Settling Time (Vo<10% peak deviation) All ts  50  µs General Specifications Parameter Min Typ Max Unit Calculated MTBF (IO=IO, max, TA=25°C) 19,000,000 Hours Weight  2.8 (0.1)  g (oz.) September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 4 Data Sheet GE TM Austin MicroLynx : SIP Non-Isolated DC-DC Power Modules 3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current 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 Remote On/Off Signal interface (V =V to V ; Open collector pnp or equivalent IN IN, min IN, max Compatible, Von/off signal referenced to GND See feature description section) Logic Low (On/Off Voltage pin open - Module ON) Von/Off All VIL ― ― 0.4 V Ion/Off All IIL ― ― 10 μA Logic High (Von/Off > 2.5V – Module Off) Von/Off All VIH ― ― VIN, max V Ion/off All IIH ― ― 1 mA Turn-On Delay and Rise Times o (IO=IO, max , VIN = VIN, nom, TA = 25 C, ) All Tdelay ― 3.9 ― msec Case 1: On/Off input is set to Logic Low (Module ON) and then input power is applied (delay from instant at which VIN =VIN, min until Vo=10% of Vo,set) All Tdelay ― 3.9 ― msec Case 2: Input power is applied for at least one second and then the On/Off input is set to logic Low (delay from instant at which Von/Off=0.3V until Vo=10% of Vo, set) All Trise ― 4.2 8.5 msec Output voltage Rise time (time for Vo to rise from 10% of Vo,set to 90% of Vo, set) 1 Output voltage overshoot – Startup ― % VO, set o I = I ; V = 3.0 to 5.5Vdc, T = 25 C O O, max IN A Overtemperature Protection All T  150  °C ref (See Thermal Consideration section) Input Undervoltage Lockout Turn-on Threshold All 2.2 V Turn-off Threshold All 2.0 V September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 5 Data Sheet GE TM Austin MicroLynx : SIP Non-Isolated DC-DC Power Modules 3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current Characteristic Curves TM The following figures provide typical characteristics for the Austin MicroLynx SIP modules at 25ºC. 88 95 85 90 82 85 79 Vin = 3.0V Vin = 3.0V 80 76 Vin = 5.0V Vin = 5.0V 75 73 Vin = 5.5V Vin = 5.5V 70 70 0 1 2 3 4 5 0 1 2 3 4 5 OUTPUT CURRENT, I (A) OUTPUT CURRENT, I (A) O O Figure 1. Converter Efficiency versus Output Current (Vout Figure 4. Converter Efficiency versus Output Current (Vout = 0.75Vdc). = 1.8Vdc). 95 100 95 90 90 85 85 Vin = 3.0V 80 Vin = 3.0V 80 Vin = 5.0V Vin = 5.0V 75 75 Vin = 5.5V Vin = 5.5V 70 70 0 1 2 3 4 5 0 1 2 3 4 5 OUTPUT CURRENT, I (A) OUTPUT CURRENT, I (A) O O Figure 2. Converter Efficiency versus Output Current (Vout Figure 5. Converter Efficiency versus Output Current (Vout = 1.2Vdc). = 2.5Vdc). 95 100 95 90 90 85 Vin = 3.0V 85 80 Vin = 4.5V 80 Vin = 5.0V Vin = 5.0V 75 75 Vin = 5.5V Vin = 5.5V 70 70 0 1 2 3 4 5 0 1 2 3 4 5 OUTPUT CURRENT, I (A) OUTPUT CURRENT, I (A) O O Figure 3. Converter Efficiency versus Output Current (Vout Figure 6. Converter Efficiency versus Output Current (Vout = 1.5Vdc). = 3.3Vdc). September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 6 EFFICIENCY, η (%) EFFICIENCY, η (%) EFFICIENCY, η (%) EFFICIENCY, η (%) EFFICIENCY, η (%) EFFICIENCY, η (%) Data Sheet GE TM Austin MicroLynx : SIP Non-Isolated DC-DC Power Modules 3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current Characteristic Curves (continued) TM The following figures provide typical characteristics for the MicroLynx SIP modules at 25ºC. 6 Io=0A 5 Io=2.5A 4 Io=5A 3 2 1 0 0.5 1.5 2.5 3.5 4.5 5.5 INPUT VOLTAGE, VIN (V) TIME, t (5 µs/div) Figure 7. Input voltage vs. Input Current Figure 10. Transient Response to Dynamic Load Change from 50% to 100% of full load (Vo = 3.3Vdc). (Vout = 2.5Vdc). TIME, t (2µs/div) TIME, t (5 µs/div) Figure 8. Typical Output Ripple and Noise Figure 11. Transient Response to Dynamic Load Change from 100% to 50% of full load (Vo = 3.3 Vdc). (Vin = 5V dc, Vo = 0.75 Vdc, Io=5A). TIME, t (2µs/div) TIME, t (10µs/div) Figure 9. Typical Output Ripple and Noise Figure 12. Transient Response to Dynamic Load Change from 50% to 100% of full load (Vo = 3.3 Vdc, Cext = 2x150 (Vin = 5V dc, Vo = 3.3 Vdc, Io=5A). μF Polymer Capacitors). September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 7 OUTPUT VOLTAGE OUTPUT VOLTAGE INPUT CURRENT, I (A) VO (V) (20mV/div) VO (V) (20mV/div) IN OUTPUT CURRENT, OUTPUT VOLTAGE OUTPUT CURRENT, OUTPUT VOLTAGE OUTPUT CURRENT, OUTPUT VOLTAGE IO (A) (2A/div) VO (V) (50mV/div) IO (A) (2A/div) VO (V) (100mV/div) IO (A) (2A/div) VO (V) (100mV/div) Data Sheet GE TM Austin MicroLynx : SIP Non-Isolated DC-DC Power Modules 3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current Characteristic Curves (continued) TM The following figures provide typical characteristics for the Austin MicroLynx SIP modules at 25ºC. TIME, t (2 ms/div) TIME, t (10µs/div) Figure 13. Transient Response to Dynamic Load Change Figure 16. Typical Start-Up with application of Vin with (Vin from 100% of 50% full load (Vo = 3.3 Vdc, Cext = 2x150 μF = 5.0Vdc, Vo = 3.3Vdc, Io = 5A). Polymer Capacitors). TIME, t (2 ms/div) TIME, t (2 ms/div) Figure 14. Typical Start-Up Using Remote On/Off Figure 17 Typical Start-Up using Remote On/off with Prebias (Vin = 3.3Vdc, Vo = 1.8Vdc, Io = 1A, Vbias =1.0 Vdc). (Vin = 5Vdc, Vo = 3.3Vdc, Io = 5.0A). TIME, t (2 ms/div) TIME, t (20ms/div) Figure 15. Typical Start-Up Using Remote On/Off with Low- Figure 18. Output short circuit Current (Vin = 5Vdc, Vo = ESR external capacitors (7x150uF Polymer) (Vin = 5Vdc, Vo 0.75Vdc). = 3.3Vdc, Io = 5.0A, Co = 1050µF). September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 8 OUTPUT VOLTAGE On/Off VOLTAGE OUTPUT VOLTAGE On/Off VOLTAGE OUTPUT CURRENT OUTPUTVOLTAGE VOV) (1V/div) VOn/off (V) (2V/div) VOV) (1V/div) VOn/off (V) (52V/div) IO (A) (2A/div) VO (V) (50mV/div) OUTPUT CURRENT, OUTPUT VOLTAGE On/Off VOLTAGE OUTPUT VOLTAGE, INPUT VOLTAGE V (V) o IO (A) (5A/div) VOV) (1V/div) VOn/off (V) (2V/div) (1V/div) VIN (V) (2V/div) Data Sheet GE TM Austin MicroLynx : SIP Non-Isolated DC-DC Power Modules 3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current Characteristic Curves (continued) TM The following figures provide thermal derating curves for the Austin MicroLynx SIP modules. 6 6 5 5 4 4 3 3 NC NC 2 2 0.5m/s (100 LFM) 0.5m/s (100 LFM) 1 1 1.0m/s (200 LFM) 1.0m/s (200 LFM) 0 0 20 30 40 50 60 70 80 90 20 30 40 50 60 70 80 90 O O AMBIENT TEMPERATURE, T C AMBIENT TEMPERATURE, T C A A Figure 19. Derating Output Current versus Local Ambient Figure 22. Derating Output Current versus Local Ambient Temperature and Airflow (Vin = 5.0Vdc, Vo=3.3Vdc). Temperature and Airflow (Vin = 3.3Vdc, Vo=0.75 Vdc). 6 5 4 3 NC 2 0.5m/s (100 LFM) 1 1.0m/s (200 LFM) 0 20 30 40 50 60 70 80 90 O AMBIENT TEMPERATURE, T C A Figure 20. Derating Output Current versus Local Ambient Temperature and Airflow (Vin = 5.0Vdc, Vo=0.75 Vdc). 6 5 4 3 NC 2 0.5m/s (100 LFM) 1 1.0m/s (200 LFM) 0 20 30 40 50 60 70 80 90 O AMBIENT TEMPERATURE, T C A Figure 21. Derating Output Current versus Local Ambient Temperature and Airflow (Vin = 3.3Vdc, Vo=2.5 Vdc). September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 9 OUTPUT CURRENT, Io (A) OUTPUT CURRENT, Io (A) OUTPUT CURRENT, Io (A) OUTPUT CURRENT, Io (A) Data Sheet GE TM Austin MicroLynx : SIP Non-Isolated DC-DC Power Modules 3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current Test Configurations Design Considerations Input Filtering CURRENT PROBE TO OSCILLOSCOPE TM The Austin MicroLynx SIP module should be connected to a LTEST low-impedance source. A highly inductive source can affect VIN(+) 1μH the stability of the module. An input capacitance must be placed directly adjacent to the input pin of the module, to C minimize input ripple voltage and ensure module stability. IN C 1000μF S Electrolytic To minimize input voltage ripple, low-ESR polymer and ceramic 2x100μF E.S.R.<0.1Ω Tantalum capacitors are recommended at the input of the module. @ 20°C 100kHz Figure 26 shows the input ripple voltage (mVp-p) for various COM outputs with 1x150 µF polymer capacitors (Panasonic p/n: EEFUE0J151R, Sanyo p/n: 6TPE150M) in parallel with 1 x 47 µF NOTE: Measure input reflected ripple current with a simulated ceramic capacitor (Panasonic p/n: ECJ-5YB0J476M, Taiyo- source inductance (LTEST) of 1μH. Capacitor CS offsets possible battery impedance. Measure current as shown Yuden p/n: CEJMK432BJ476MMT) at full load. Figure 27 shows above. the input ripple with 2x150 µF polymer capacitors in parallel with 2 x 47 µF ceramic capacitor at full load. Figure 23. Input Reflected Ripple Current Test Setup. COPPER STRIP 120 V O (+) RESISTIVE LOAD 100 1uF . 10uF SCOPE 80 COM 60 GROUND PLANE 40 NOTE: All voltage measurements to be taken at the module terminals, as shown above. If sockets are used then Vin = 3.3V Kelvin connections are required at the module terminals 20 to avoid measurement errors due to socket contact resistance. Vin = 5.0V Figure 24. Output Ripple and Noise Test Setup. 0 0 1 2 3 4 Output Voltage (Vdc) R R R R distribution contact contact distribution V (+) V Figure 26. Input ripple voltage for various output with 1x150 IN O µF polymer and 1x47 µF ceramic capacitors at the input (full load) R LOAD V VO IN 120 100 R R R R distribution contact contact distribution COM COM 80 NOTE: All voltage measurements to be taken at the module 60 terminals, as shown above. If sockets are used then Kelvin connections are required at the module terminals to avoid measurement errors due to socket contact 40 resistance. Vin = 3.3V 20 Figure 25. Output Voltage and Efficiency Test Setup. Vin = 5.0V 0 V . I O O 0 1 2 3 4 Efficiency η = x 100 % V . I IN IN Output Voltage (Vdc) Figure 27. Input ripple voltage for various output with 2x150 µF polymer and 2x47 µF ceramic capacitors at the input (full load) September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 10 BATTERY Input Ripple Voltage (mVp-p) Input Ripple Voltage (mVp-p) Data Sheet GE TM Austin MicroLynx : SIP Non-Isolated DC-DC Power Modules 3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current Design Considerations (continued) Safety Considerations For safety agency approval the power module must be installed in compliance with the spacing and separation Output Filtering requirements of the end-use safety agency standards, i.e., UL TM The Austin MicroLynx SIP module is designed for low output 60950-1, CSA C22.2 No. 60950-1-03, and VDE 0850:2001-12 ripple voltage and will meet the maximum output ripple (EN60950-1) Licensed. specification with 1 µF ceramic and 10 µF polymer capacitors at the output of the module. However, additional output For the converter output to be considered meeting the filtering may be required by the system designer for a number requirements of safety extra-low voltage (SELV), the input must of reasons. First, there may be a need to further reduce the meet SELV requirements. The power module has extra-low output ripple and noise of the module. Second, the dynamic voltage (ELV) outputs when all inputs are ELV. response characteristics may need to be customized to a particular load step change. The input to these units is to be provided with a fast-acting fuse with a maximum rating of 6A in the positive input lead. 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. For stable operation of the module, limit the capacitance to less than the maximum output capacitance as specified in the electrical specification table. September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 11 Data Sheet GE TM Austin MicroLynx : SIP Non-Isolated DC-DC Power Modules 3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current Overcurrent Protection Feature Description To provide protection in a fault (output overload) condition, the Remote On/Off unit is equipped with internal current-limiting circuitry and can TM endure current limiting continuously. At the point of The Austin MicroLynx SIP power modules feature an On/Off current-limit inception, the unit enters hiccup mode. The unit pin for remote On/Off operation of the module. If not using the operates normally once the output current is brought back into remote On/Off pin, leave the pin open (module will be On). The its specified range. The typical average output current during On/Off pin signal (Von/Off) is referenced to ground. To switch hiccup is 2A. module on and off using remote On/Off, connect an open collector pnp transistor between the On/Off pin and the V pin IN Input Undervoltage Lockout (See Figure 28). At input voltages below the input undervoltage lockout limit, module operation is disabled. The module will begin to operate When the transistor Q1 is in the OFF state, the power module is at an input voltage above the undervoltage lockout turn-on ON (Logic Low on the On/Off pin of the module) and the threshold. maximum Von/off of the module is 0.4 V. The maximum allowable leakage current of the transistor when Von/off = 0.4V Overtemperature Protection and VIN = VIN,max is 10μA. During a logic-high when the To provide over temperature protection in a fault condition, the transistor is in the active state, the power module is OFF. unit relies upon the thermal protection feature of the controller During this state VOn/Off =10 - 14V and the maximum IOn/Off IC. The unit will shutdown if the thermal reference point Tref2, = 1mA. o (see Figure 31) exceeds 150 C (typical), but the thermal V (+) IN shutdown is not intended as a guarantee that the unit will survive temperatures beyond its rating. The module will Lynx-series Module automatically restarts after it cools down. IOn/Off On/Off Pin Enable 20k Css 20k GND Figure 28. Remote On/Off Implementation Remote On/Off can also be implemented using open-collector logic devices with an external pull-up resistor. Figure 28a shows the circuit configuration using this approach. Pull-up resistor, Rpull-up, for the configuration should be 5k (+/-5%) for proper operation of the module over the entire temperature range. VIN+ MODULE R pull-up I ON/OFF ON/OFF + PWM Enable V ON/OFF R1 Q2 CSS Q1 R2 GND _ Figure 28a. Remote On/Off Implementation using logic-level devices and an external pull-up resistor September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 12 Data Sheet GE TM Austin MicroLynx : SIP Non-Isolated DC-DC Power Modules 3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current Feature Descriptions (continued) V (+) V (+) IN O Output Voltage Programming TM The output voltage of the Austin MicroLynx can be ON/OFF programmed to any voltage from 0.75Vdc to 3.63Vdc by LOAD TRIM connecting a resistor (shown as Rtrim in Figure 29) between Trim and GND pins of the module. Without an external resistor + V tri m between Trim and GND pins, the output of the module will be - GND 0.7525Vdc. To calculate the value of the trim resistor, Rtrim for a desired output voltage, use the following equation:  21070  Rtrim= − 5110Ω Figure 30. Circuit Configuration for programming Output   Vo− 0.7525   voltage using external voltage source Rtrim is the external resistor in Ω Vo is the desired output voltage Table 1 provides Rtrim values for most common output voltages. Table 2 provides values of external voltage For example, to program the output voltage of the Austin TM source, Vtrim for various output voltage. MicroLynx module to 1.8V, Rtrim is calculated as follows: Table 1 21070   Rtrim= − 5110   VO, set (V) Rtrim (KΩ) 1.8− 0.7525   0.7525 Open Rtrim= 9.024kΩ 1.2 41.973 1.5 23.077 V (+) V (+) 1.8 15.004 IN O 2.5 6.947 3.3 3.160 ON/OFF LOAD TRIM Table 2 R trim V (V) Vtrim (V) O, set GND 0.7525 Open 1.2 0.6240 Figure 29. Circuit configuration to program output voltage 1.5 0.5731 using an external resistor 1.8 0.5221 2.5 0.4033 TM Austin MicroLynx can also be programmed by applying a 3.3 0.2670 voltage between TRIM and GND pins (Figure 30). The following equation can be used to determine the value of Vtrim needed to obtain a desired output voltage Vo: Using 1% tolerance trim resistor, set point tolerance of ±2% is Vtrim=(0.7− 0.1698×{Vo− 0.7525}) achieved as specified in the electrical specification. The POL TM For example, to program the output voltage of a MicroLynx Programming Tool, available at www.gecriticalpower.com module to 3.3 Vdc, Vtrim is calculated as follows: under the Design Tools section, helps determine the required external trim resistor needed for a specific output voltage. Vtrim= (0.7− 0.1698×{3.3− 0.7525}) Vtrim= 0.2670V September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 13 Data Sheet GE TM Austin MicroLynx : SIP Non-Isolated DC-DC Power Modules 3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current Feature Descriptions (continued) The amount of power delivered by the module is defined as the voltage at the output terminals multiplied by the output current. When using the trim feature, the output voltage of the module can be increased, which at the same output current would increase the power output of the module. Care should be taken to ensure that the maximum output power of the module remains at or below the maximum rated power (P = V x I ). max o,set o,max Voltage Margining Output voltage margining can be implemented in the Austin TM MicroLynx modules by connecting a resistor, R , margin-up from Trim pin to ground pin for margining-up the output voltage and by connecting a resistor, R , from Trim margin-down pin to Output pin. Figure 31 shows the circuit configuration for output voltage margining The POL Programming Tool, available at www.gecriticalpower.com under the Design Tools section, also calculates the values of R and margin-up Rmargin-down for a specific output voltage and % margin. Please consult your local GE technical representative for additional details Vo Rmargin-down Austin Lynx or Lynx II Series Q2 Trim Rmargin-up Rtrim Q1 GND Figure 31. Circuit Configuration for margining Output voltage. September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 14 Data Sheet GE TM Austin MicroLynx : SIP Non-Isolated DC-DC Power Modules 3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current Thermal Considerations Power modules operate in a variety of thermal environments; however, sufficient cooling should be provided to help ensure reliable operation. Considerations include ambient temperature, airflow, module power dissipation, and the need for increased reliability. A 25.4_ reduction in the operating temperature of the module will Wind Tunnel (1.0) 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 33. Note that the PWBs Power Module airflow is parallel to the long axis of the module as shown in figure 32. The derating data applies to airflow in either direction of the module’s long axis. 76.2_ (3.0) x Probe Location for measuring 7.24_ airflow and (0.285) ambient temperature Air flow Figure 33. Thermal Test Set-up. Heat Transfer via Convection Increased airflow over the module enhances the heat transfer via convection. Thermal derating curves showing the maximum output current that can be delivered by various module versus local ambient temperature (T ) for natural A convection and up to 1m/s (200 ft./min) are shown in the Characteristics Curves section. Layout Considerations Copper paths must not be routed beneath the power module. For additional layout guide-lines, refer to FLTR100V10 application note. Figure 32. T Temperature measurement location. ref The thermal reference point, Tref 1 used in the specifications of thermal derating curves is shown in Figure 32. For reliable o operation this temperature should not exceed 125 C. The output power of the module should not exceed the rated power of the module (Vo,set x Io,max). Please refer to the Application Note “Thermal Characterization Process For Open-Frame Board-Mounted Power Modules” for a detailed discussion of thermal aspects including maximum device temperatures. September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 15 Data Sheet GE TM Austin MicroLynx : SIP Non-Isolated DC-DC Power Modules 3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current They are designed to be processed through single or dual wave Post solder Cleaning and Drying soldering machines. The pins have an RoHS-compliant finish Considerations that is compatible with both Pb and Pb-free wave soldering processes. A maximum preheat rate of 3°C/s is suggested. The Post solder cleaning is usually the final circuit-board assembly wave preheat process should be such that the temperature of process prior to electrical board testing. The result of the power module board is kept below 210°C. For Pb solder, inadequate cleaning and drying can affect both the reliability the recommended pot temperature is 260°C, while the Pb-free of a power module and the testability of the finished circuit-board assembly. For guidance on appropriate soldering, solder pot is 270°C max. Not all RoHS-compliant through-hole cleaning and drying procedures, refer to Board Mounted Power products can be processed with paste-through-hole Pb or Pb- Modules: Soldering and Cleaning Application Note. free reflow process. If additional information is needed, please consult with your GE technical representative for more details. Through-Hole Lead-Free Soldering Information The RoHS-compliant through-hole products use the SAC (Sn/Ag/Cu) Pb-free solder and RoHS-compliant components. September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 16 Data Sheet GE TM Austin MicroLynx : SIP Non-Isolated DC-DC Power Modules 3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A 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.) September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 17 Data Sheet GE TM Austin MicroLynx : SIP Non-Isolated DC-DC Power Modules 3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A 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.) September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 18 Data Sheet GE TM Austin MicroLynx : SIP Non-Isolated DC-DC Power Modules 3Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 5A Output Current Ordering Information Please contact your GE Sales Representative for pricing, availability and optional features. Table 3. Device Codes Input Output Output Efficiency On/Off Connector Device Code Comcodes Voltage Range Voltage Current 3.3V@ 5A Logic Type AXH005A0XZ 3.0 – 5.5Vdc 0.75 – 3.63Vdc 5 A 94.0% Negative SIP CC109104881 AXH005A0X 3.0 – 5.5Vdc 0.75 – 3.63Vdc 5 A 94.0% Negative SIP 108979675 -Z refers to RoHS compliant Versions 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 25, 2015 ©2015 General Electric Company. All International rights reserved. Version 1.35