Data Sheet GE TM Austin Lynx : SMT Non-Isolated DC-DC Power Modules, Programmable 3.0Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A Output Current Features  Compliant to RoHS EU Directive 2011/65/EU (-Z RoHS Compliant 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 10A output current  High efficiency – 95% at 3.3V full load (V = 5.0V) IN  Small size and low profile: 33.0 mm x 13.5 mm x 8.28 mm (1.30 in x 0.53 in x 0.326 in)  Low output ripple and noise Applications  High Reliability:  Distributed power architectures o Calculated MTBF = 15.7 M hours at 25 C Full-load  Intermediate bus voltage applications  Constant switching frequency (300 kHz)  Telecommunications equipment  Output voltage programmable from 0.75 Vdc to 3.63Vdc via external resistor  Servers and storage applications  Line Regulation: 0.3% (typical)  Networking equipment  Load Regulation: 0.4% (typical)  Enterprise Networks  Temperature Regulation: 0.4 % (typical)  Latest generation IC’s (DSP, FPGA, ASIC) and Microprocessor powered applications  Remote On/Off  Remote Sense(optional)  Over temperature protection  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 Lynx SMT (surface mount technology) power modules are non-isolated dc-dc converters that can deliver up to 10A of output current with full load efficiency of 95% at 3.3V output. These modules provide a precisely regulated output voltage programmable via an external resistor from 0.75Vdc to 3.63Vdc over a wide range of input voltage (VIN = 3.0 – 5.5Vdc). Their open-frame construction and small footprint enable designers to develop cost- and space-efficient solutions. Standard features include remote On/Off, remote sense, programmable output voltage, over current and over temperature protections. * 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 October 7, 2015 ©2015 General Electric Company. All rights reserved. Data Sheet GE TM Austin Lynx : SMT Non-Isolated DC-DC Power Modules, Programmable 3.0Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A 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 VO,set ≤ VIN – 0.5V VIN 3.0  5.5 Vdc Maximum Input Current All IIN,max 10 Adc (VIN= VIN, min to VIN, max, IO=IO, max VO,set = 3.3Vdc) Input No Load Current V = 0.75Vdc I 25 mA O,set IN,No load (V = 5.0Vdc, I = 0, module enabled) V = 3.3Vdc I 30 mA IN O O,set IN,No load Input Stand-by Current All IIN,stand-by 1.5 mA (V = 5.0Vdc, module disabled) IN 2 2 Inrush Transient All I t 0.1 A s Input Reflected Ripple Current, peak-to-peak (5Hz to 20MHz, 1μH source impedance; V to V All 100 mAp-p IN, min IN, I = I ; See Test configuration section) max, O Omax 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 15A, time-delay fuse (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. October 7, 2015 ©2015 General Electric Company. All rights reserved. Page 2 Data Sheet GE TM Austin Lynx : SMT Non-Isolated DC-DC Power Modules, Programmable 3.0Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A Output Current Electrical Specifications (continued) Parameter Device Symbol Min Typ Max Unit Output Voltage Set-point All VO, set -2.0 VO, set +2.0 % VO, set (V =V , I =I , T =25°C) IN IN, min O O, max A 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 V 0.7525 3.63 Vdc O 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 (Tref=TA, min to TA, max) All  0.4  % VO, 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 8 15 mV  rms Peak-to-Peak (5Hz to 20MHz bandwidth) All 25 50 mV  pk-pk External Capacitance ESR ≥ 1 mΩ All C 1000 μF O, max   ESR ≥ 10 mΩ All C 5000 μF O, max   Output Current All I 0 10 Adc o Output Current Limit Inception (Hiccup Mode ) All I 220 % I O, lim   o (VO= 90% of VO, set) Output Short-Circuit Current All I  2  Adc O, s/c (V ≤250mV) ( Hiccup Mode ) O Efficiency V = 0.75Vdc η 82.5 % O,set V = V , T =25°C V = 1.2Vdc η 88.0 % IN IN, nom A O, set I =I V = V V = 1.5Vdc η 89.5 % O O, max , O O,set O,set V = 1.8Vdc η 91.0 % O,set V = 2.5Vdc η 93.0 % O,set V = 3.3Vdc η 95.0 % O,set Switching Frequency All f 300 kHz sw   Dynamic Load Response (dIo/dt=2.5A/µs; V = V ; T =25°C) All V  200  mV IN IN, nom A 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 25 µs s   (dIo/dt=2.5A/µs; V = V ; T =25°C) All V 200 mV IN IN, nom A pk   Load Change from Io= 100% to 50%of Io,max: 1μF ceramic// 10 μF tantalum Peak Deviation Settling Time (Vo<10% peak deviation) All ts  25  µs October 7, 2015 ©2015 General Electric Company. All rights reserved. Page 3 Data Sheet GE TM Austin Lynx : SMT Non-Isolated DC-DC Power Modules, Programmable 3.0Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A Output Current Electrical Specifications (continued) Parameter Device Symbol Min Typ Max Unit Dynamic Load Response All V 100 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  100  µs (dIo/dt=2.5A/µs; VIN = VIN, nom; TA=25°C) All Vpk  100  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  100  µs General Specifications Parameter Min Typ Max Unit Calculated MTBF (IO=IO, max, TA=25°C) 15,726,000 Hours Telecordia SR-332 Issue 1: Method 1 Case 3 Weight  5.6 (0.2)  g (oz.) October 7, 2015 ©2015 General Electric Company. All rights reserved. Page 4 Data Sheet GE TM Austin Lynx : SMT Non-Isolated DC-DC Power Modules, Programmable 3.0Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A 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 On/Off Signal interface (On/Off is open collector/drain logic input; Signal referenced to GND - See feature description section) Input High Voltage (Module ON) All VIH ― ― V V IN, max Input High Current All IIH ― ― 10 μA Input Low Voltage (Module OFF) All VIL -0.2 ― 0.3 V Input Low Current All IIL ― 0.2 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 High (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 High (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 Remote Sense Range ― ― 0.5 V Overtemperature Protection All T 125 °C ref   (See Thermal Consideration section) Input Undervoltage Lockout Turn-on Threshold All 2.2 V Turn-off Threshold All 2.0 V October 7, 2015 ©2015 General Electric Company. All rights reserved. Page 5 Data Sheet GE TM Austin Lynx : SMT Non-Isolated DC-DC Power Modules, Programmable 3.0Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A Output Current Characteristic Curves TM The following figures provide typical characteristics for the Austin Lynx SMT modules at 25ºC. 90 96 IN V = 3.0V 93 87 90 84 87 81 84 81 78 IN V = 3.0V 78 IN V = 5.0V VIN = 5.0V 75 75 VIN = 5.5V IN V = 5.5V 72 72 0 2.5 5 7.5 10 0 2.5 5 7.5 10 OUTPUT CURRENT, IO (A) OUTPUT CURRENT, IO (A) Figure 1. Converter Efficiency versus Output Current (Vout Figure 4. Converter Efficiency versus Output Current = 0.75Vdc). (Vout = 1.8Vdc). 93 100 97 90 94 87 91 84 88 85 81 VIN = 3.0V 82 78 IN V = 3.0V VIN = 5.0V 79 VIN = 5.0V 75 76 VIN = 5.5V IN V = 5.5V 72 73 0 2.5 5 7.5 10 0 2.5 5 7.5 10 OUTPUT CURRENT, IO (A) OUTPUT CURRENT, IO (A) Figure 2. Converter Efficiency versus Output Current (Vout Figure 5. Converter Efficiency versus Output Current = 1.2Vdc). (Vout = 2.5Vdc). 94 100 91 97 94 88 91 85 88 82 85 79 IN V = 4.5V IN V = 3.0V 82 76 IN V = 5.0V VIN = 5.0V 79 73 VIN = 5.5V IN V = 5.5V 76 70 0 2.5 5 7.5 10 0 2.5 5 7.5 10 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 = 1.5Vdc). (Vout = 3.3Vdc). October 7, 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 Lynx : SMT Non-Isolated DC-DC Power Modules, Programmable 3.0Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A Output Current Characteristic Curves (continued) TM The following figures provide typical characteristics for the Austin Lynx SMT modules at 25ºC. 10 Io=10A 9 Io=5A 8 Io=0A 7 6 5 4 3 2 1 0 0.5 1.5 2.5 3.5 4.5 5.5 INPUT VOLTAGE, V (V) IN TIME, t (10µs/div) Figure 7. Input voltage vs. Input Current (Vo = 2.5Vdc). Figure 10. Transient Response to Dynamic Load Change from 50% to 100% of full load (Vo = 3.3Vdc). TIME, t (2µs/div) TIME, t (10µs/div) Figure 8. Typical Output Ripple and Noise (Vin = 5.0V dc, Figure 11. Transient Response to Dynamic Load Change Vo = 0.75 Vdc, Io=10A). from 100% to 50% of full load (Vo = 3.3 Vdc). TIME, t (2µs/div) TIME, t (20µs/div) Figure 9. Typical Output Ripple and Noise (Vin = 5.0V dc, Figure 12. Transient Response to Dynamic Load Change Vo = 3.3 Vdc, Io=10A). from 50% to 100% of full load (Vo = 3.3 Vdc, Cext = 2x150 μF Polymer Capacitors). October 7, 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 VOLTAG I (A) O IO (A) (5A/div) VO (V) (50mV/div) (5A/div) VO (V) (200mV/div) IO (A) (5A/div) VO (V) (200mV/div) Data Sheet GE TM Austin Lynx : SMT Non-Isolated DC-DC Power Modules, Programmable 3.0Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A Output Current Characteristic Curves (continued) TM The following figures provide typical characteristics for the Austin Lynx SMT modules at 25ºC. TIME, t (2 ms/div) TIME, t (20µs/div) Figure 13. Transient Response to Dynamic Load Change Figure 16. Typical Start-Up with application of Vin from 100% of 50% full load (Vo = 5.0 Vdc, Cext = 2x150 μF (Vin = 5.5Vdc, Vo = 3.3Vdc, Io = 10A). Polymer Capacitors). TIME, t (2 ms/div) TIME, t (2 ms/div) Figure 14. Typical Start-Up Using Remote On/Off (Vin = Figure 17 Typical Start-Up Using Remote On/Off with 5.0Vdc, Vo = 3.3Vdc, Io = 10.0A). Prebias (Vin = 3.3Vdc, Vo = 1.8Vdc, Io = 1.0A, Vbias =1.0Vdc). TIME, t (2 ms/div) TIME, t (10ms/div) Figure 15. Typical Start-Up Using Remote On/Off with Low- Figure 18. Output short circuit Current (Vin = 5.0Vdc, Vo ESR external capacitors (Vin = 5.5Vdc, Vo = 3.3Vdc, Io = = 0.75Vdc). 10.0A, Co = 1050µF). October 7, 2015 ©2015 General Electric Company. All rights reserved. Page 8 On/Off VOLTAGE OUTPUT VOLTAGE On/Off VOLTAGE OUTPUT VOLTAGE OUTPUT CURRENT, OUTPUT VOLTAGE VOn/off (V) (5V/div) VO (V)(1V/div) VOn/off (V) (5V/div) VO (V)(1V/div) IO (A) (5A/div) VO (V) (50mV/div) OUTPUT CURRENT, INPUT VOLTAGE OUTPUT VOLTAGE INPUT VOLTAGE OUTPUT VOLTAGE IO (A) (10A/div) VOn/off (V) (2V/div) VO (V)(1V/div) VOn/off (V) (2V/div) VO (V)(1V/div) Data Sheet GE TM Austin Lynx : SMT Non-Isolated DC-DC Power Modules, Programmable 3.0Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A Output Current Characteristic Curves (continued) TM The following figures provide thermal derating curves for the Austin Lynx SMT modules. 12 12 10 10 8 8 6 6 4 4 NC NC 2 2 100 LFM 100 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 Temperature and Airflow (Vin = 5.0, Vo=0.75Vdc). Ambient Temperature and Airflow (Vin = 5.0dc, Vo=3.3 Vdc). 12 12 10 10 8 8 6 6 4 4 NC NC 2 2 100 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 20. Derating Output Current versus Local Ambient Figure 23. Derating Output Current versus Local Temperature and Airflow (Vin = 5.0Vdc, Vo=1.8 Vdc). Ambient Temperature and Airflow (Vin = 3.3Vdc, Vo=2.5 Vdc). 12 10 8 6 4 NC 2 100 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 = 5.0Vdc, Vo=2.5 Vdc). October 7, 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) OUTPUT CURRENT, Io (A) Data Sheet GE TM Austin Lynx : SMT Non-Isolated DC-DC Power Modules, Programmable 3.0Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A Output Current Test Configurations Design Considerations Input Filtering CURRENT PROBE TO OSCILLOSCOPE TM Austin Lynx SMT module should be connected to a low- LTEST impedance source. A highly inductive source can affect the VIN(+) 1μH stability of the module. An input capacitance must be placed directly adjacent to the input pin of the module, to minimize C input ripple voltage and ensure module stability. IN C 1000μF S Electrolytic 2x100μF E.S.R.<0.1Ω Tantalum @ 20°C 100kHz To minimize input voltage ripple, low-ESR polymer and ceramic capacitors are recommended at the input of the module. COM Figure 27 shows input ripple voltage (mVp-p) for various outputs with 1x150 µF polymer capacitors (Panasonic p/n: NOTE: Measure input reflected ripple current with a simulated source inductance (L ) of 1μH. Capacitor C offsets TEST S EEFUE0J151R, Sanyo p/n: 6TPE150M) in parallel with 1 x 47 µF possible battery impedance. Measure current as shown ceramic capacitor (Panasonic p/n: ECJ-5YB0J476M, Taiyo- above. Yuden p/n: CEJMK432BJ476MMT) at full load. Figure 28 shows Figure 24. Input Reflected Ripple Current Test Setup. the input ripple with 2x150 µF polymer capacitors in parallel with 2 x 47 µF ceramic capacitor at full load. COPPER STRIP 200 180 V (+) RESISTIVE O LOAD 160 1uF . 10uF SCOPE 140 120 COM 100 80 GROUND PLANE 60 NOTE: All voltage measurements to be taken at the module 3.3Vin terminals, as shown above. If sockets are used then 40 Kelvin connections are required at the module terminals 5Vin 20 to avoid measurement errors due to socket contact resistance. 0 Figure 25. Output Ripple and Noise Test Setup. 0 0.5 1 1.5 2 2.5 3 3.5 Output Voltage (Vdc) Rdistribution Rcontact Rcontact Rdistribution Figure 27. Input ripple voltage for various output with 1x150 VIN(+) VO µF polymer and 1x47 µF ceramic capacitors at the input (full load). RLOAD V V IN O 140 120 R R R R distribution contact contact distribution COM COM 100 80 NOTE: All voltage measurements to be taken at the module terminals, as shown above. If sockets are used then 60 Kelvin connections are required at the module terminals to avoid measurement errors due to socket contact resistance. 40 3.3Vin 20 Figure 26. Output Voltage and Efficiency Test Setup. 5Vin 0 V . I O O 0 0.5 1 1.5 2 2.5 3 3.5 Efficiency = x 100 % η V . I IN IN Output Voltage (Vdc) Figure 28. Input ripple voltage for various output with 2x150 µF polymer and 2x47 µF ceramic capacitors at the input (full load). October 7, 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 Lynx : SMT Non-Isolated DC-DC Power Modules, Programmable 3.0Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A Output Current Design Considerations (continued) Safety Considerations Output Filtering For safety agency approval the power module must be installed in compliance with the spacing and separation TM The Austin Lynx SMT module is designed for low output ripple requirements of the end-use safety agency standards, i.e., UL voltage and will meet the maximum output ripple specification 60950-1, CSA C22.2 No. 60950-1-03, and VDE 0850:2001-12 with 1 µF ceramic and 10 µF tantalum capacitors at the output (EN60950-1) Licensed. of the module. However, additional output filtering may be required by the system designer for a number of reasons. First, there may be a need to further reduce the output ripple and For the converter output to be considered meeting the noise of the module. Second, the dynamic response requirements of safety extra-low voltage (SELV), the input must characteristics may need to be customized to a particular load meet SELV requirements. The power module has extra-low step change. voltage (ELV) outputs when all inputs are ELV. The input to these units is to be provided with a fast-acting To reduce the output ripple and improve the dynamic response fuse with a maximum rating of 15A in the positive input lead. 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. October 7, 2015 ©2015 General Electric Company. All rights reserved. Page 11 Data Sheet GE TM Austin Lynx : SMT Non-Isolated DC-DC Power Modules, Programmable 3.0Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A Output Current Figure 32. Remote sense circuit configuration. Feature Description Overcurrent Protection Remote On/Off To provide protection in a fault (output overload) condition, the TM The Austin Lynx SMT power modules feature an On/Off pin unit is equipped with internal current-limiting circuitry and can for remote On/Off operation. The On/Off pin is an open endure current limiting continuously. At the point of collector/drain logic input signal (Von/Off) that is referenced to current-limit inception, the unit enters hiccup mode. The unit ground. Circuit configuration for using the On/Off pin is shown operates normally once the output current is brought back into in Figure 29. During a logic-high (On/Off pin is pulled high its specified range. The typical average output current during internal to the module) when the transistor Q1 is in the Off hiccup is 3A. state, the power module is ON. Maximum allowable leakage current of the transistor when Von/off = V is 10µA. Input Undervoltage Lockout IN,max Applying a logic-low when the transistor Q1 is turned-On, the At input voltages below the input undervoltage lockout limit, power module is OFF. During this state VOn/Off must be less module operation is disabled. The module will begin to operate than 0.3V. When not using positive logic On/off pin, leave the at an input voltage above the undervoltage lockout turn-on pin unconnected or tie to V IN. threshold. Overtemperature Protection VIN+ MODULE R2 To provide protection in a fault condition, the unit is equipped with a thermal shutdown circuit. The unit will shutdown if the o ON/OFF thermal reference point T , exceeds 125 C (typical), but the ref Q2 + R1 thermal shutdown is not intended as a guarantee that the unit V ON/OFF will survive temperatures beyond its rating. The module will I ON/OFF PWM Enable automatically restarts after it cools down. R3 Output Voltage Programming Q1 TM The output voltage of the Austin Lynx SMT can be Q3 CSS programmed to any voltage from 0.75 Vdc to 3.63 Vdc by R4 connecting a single resistor (shown as Rtrim in Figure 31) between the TRIM and GND pins of the module. Without an GND _ external resistor between the TRIM pin and the ground, the output voltage of the module is 0.7525 Vdc. To calculate the value of the resistor Rtrim for a particular output voltage Vo, Figure 29. Circuit configuration for using positive logic use the following equation: On/OFF. 21070   Remote Sense Rtrim= − 5110Ω   Vo− 0.7525   TM The Austin Lynx SMT power modules offer an option for Remote Sense feature. When the device code description includes a suffix “3”, sense pin is added to the module and the For example, to program the output voltage of the Austin Remote Sense feature is active. See ordering information at TM Lynx II module to 1.8 Vdc, Rtrim is calculated is follows: the end of this document for code description. 21070   Remote sense minimizes the effects of distribution losses by Rtrim= − 5110Ω   1.8− 0.7525 regulating the voltage at the load via Sense and GND pins (see   Figure 30). The voltage between the Sense pin and Vo pin must not exceed 0.5V. The amount of power delivered by the module is defined as the output voltage multiplied by the Rtrim= 15.004kΩ output current (Vo x Io). When using Remote Sense, the output voltage of the module can increase, which if the same output is maintained, increases the power output by the module. Make sure that the maximum output power of the module remains at or below the maximum rated power. When the Remote Sense feature is not being used, tie the Sense pin to output pin. R R R R distribution contact contact distribution V (+) V IN O Sense R LOAD R R R R distribution contact contact distribution COM COM October 7, 2015 ©2015 General Electric Company. All rights reserved. Page 12 Data Sheet GE TM Austin Lynx : SMT Non-Isolated DC-DC Power Modules, Programmable 3.0Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A Output Current under the Design Tools section, also calculates the values of Feature Descriptions (continued) Rmargin-up and Rmargin-down for a specific output voltage and % margin. Please consult your local GE technical representative Output Voltage Programming (continued) for additional details. Vo Rmargin-down V (+) V (+) IN O Austin Lynx or Lynx II Series Q2 LOAD ON/OFF TRIM Trim R trim Rmargin-up GND Rtrim Figure 31. Circuit configuration for programming output Q1 voltage using an external resistor. GND Table 1 provides Rtrim values required for some common output voltages. Figure 32. Circuit Configuration for margining Output Table 1 voltage. V (V) Rtrim (KΩ) O, 0.7525 Open 1.2 41.973 1.5 23.077 1.8 15.004 2.5 6.947 3.3 3.160 By a using 1% tolerance trim resistor, set point tolerance of ±2% is achieved as specified in the electrical specification. The POL Programming Tool, available at www.gecriticalpower.com under the Design Tools section, helps determine the required external trim resistor needed for a specific output voltage. 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 = max Vo,set x Io,max). Voltage Margining Output voltage margining can be implemented in the Austin TM Lynx modules by connecting a resistor, Rmargin-up, from the Trim pin to the ground pin for margining-up the output voltage and by connecting a resistor, Rmargin-down, from the Trim pin to the Output pin for margining-down. Figure 32 shows the circuit configuration for output voltage margining. The POL Programming Tool, available at www.gecriticalpower.com October 7, 2015 ©2015 General Electric Company. All rights reserved. Page 13 Data Sheet GE TM Austin Lynx : SMT Non-Isolated DC-DC Power Modules, Programmable 3.0Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A Output Current o should not exceed 115 C. Thermal Considerations The output power of the module should not exceed the rated The power modules operate in a variety of thermal power of the module (Vo,set x Io,max). environments; however, sufficient cooling should always be Please refer to the Application Note “Thermal Characterization provided to help ensure reliable operation. Process For Open-Frame Board-Mounted Power Modules” for a Considerations include ambient temperature, airflow, module detailed discussion of thermal aspects including maximum power dissipation, and the need for increased reliability. A device temperatures. reduction in the operating temperature of the module will result in an increase in reliability. The thermal data presented here is based on physical measurements taken in a wind tunnel. The test set-up is shown in Figure 34. Note that the airflow is parallel to the long axis of the module as shown in figure 33. The derating data applies to airflow in either direction of the module’s long axis. Figure 34. 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 at different local ambient temperature (TA) for airflow conditions ranging from natural convection and up to 2m/s (400 ft./min) are shown in the Characteristics Curves section. Figure 33. T Temperature measurement location. ref The thermal reference point, T used in the specifications is ref shown in Figure 33. For reliable operation this temperature 25.4_ Wind Tunnel (1.0) PWBs Power Module 76.2_ (3.0) x Probe Location for measuring 8.3_ airflow and (0.325) ambient temperature October 7, 2015 ©2015 General Electric Company. All rights reserved. Page 14 Air flow Data Sheet GE TM Austin Lynx : SMT Non-Isolated DC-DC Power Modules, Programmable 3.0Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A 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 1 On/Off 2 VIN 3 GND 4 VOUT 5 Trim 6 Sense* * Remote sense feature is a customer specified option (code suffix “3”) October 7, 2015 ©2015 General Electric Company. All rights reserved. Page 15 Data Sheet GE TM Austin Lynx : SMT Non-Isolated DC-DC Power Modules, Programmable 3.0Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A 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 1 On/Off 2 VIN 3 GND 4 VOUT 5 Trim 6 Sense* October 7, 2015 ©2015 General Electric Company. All rights reserved. Page 16 Data Sheet GE TM Austin Lynx : SMT Non-Isolated DC-DC Power Modules, Programmable 3.0Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A Output Current Packaging Details TM The Austin Lynx SMT version is supplied in tape & reel as standard. Modules are shipped in quantities of 400 modules per reel. All Dimensions are in millimeters and (in inches). Reel Dimensions Outside diameter: 330.2 mm (13.00) Inside diameter: 177.8 mm (7.00”) Tape Width: 44.0 mm (1.73”) October 7, 2015 ©2015 General Electric Company. All rights reserved. Page 17 Data Sheet GE TM Austin Lynx : SMT Non-Isolated DC-DC Power Modules, Programmable 3.0Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A Output Current Surface Mount Information infrared), or a combination of convection/IR. For reliable Pick and Place soldering the solder reflow profile should be established by TM The Austin Lynx SMT modules use an open frame accurately measuring the modules CP connector construction and are designed for a fully automated temperatures. assembly process. The modules are fitted with a label designed to provide a large surface area for pick and place operations. The label meets all the requirements for surface mount processing, as well as safety standards, and is able to o withstand reflow temperatures of up to 300 C. The label also carries product information such as product code, serial number and location of manufacture. REFLOW TIME (S) Figure 35. Reflow Profile for Tin/Lead (Sn/Pb) process. Figure 35. Pick and place Location. Nozzle Recommendations The module weight has been kept to a minimum by using open frame construction. Even so, these modules have a relatively large mass when compared to conventional SMT components. Variables such as nozzle size, tip style, vacuum pressure and pick & placement speed should be considered to optimize this process. The minimum recommended nozzle diameter for reliable operation is 3mm. The maximum nozzle outer diameter, which will safely o Figure 36. Time Limit Curve Above 205 C Reflow for Tin fit within the allowable component spacing, is 12 mm max. Lead (Sn/Pb) process. Tin Lead Soldering TM The Austin Lynx SMT power modules are lead free modules and can be soldered either in a lead-free solder process or in a conventional Tin/Lead (Sn/Pb) process. It is recommended that the customer review data sheets in order to customize the solder reflow profile for each application board assembly. The following instructions must be observed when soldering these units. Failure to observe these instructions may result in the failure of or cause damage to the modules, and can adversely affect long-term reliability. In a conventional Tin/Lead (Sn/Pb) solder process peak o reflow temperatures are limited to less than 235 C. o Typically, the eutectic solder melts at 183 C, wets the land, and subsequently wicks the device connection. Sufficient time must be allowed to fuse the plating on the connection to ensure a reliable solder joint. There are several types of SMT reflow technologies currently used in the industry. These surface mount power modules can be reliably soldered using natural forced convection, IR (radiant October 7, 2015 ©2015 General Electric Company. All rights reserved. Page 18 MAX TEMP SOLDER (°C) REFLOW TEMP (°C) Data Sheet GE TM Austin Lynx : SMT Non-Isolated DC-DC Power Modules, Programmable 3.0Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A Output Current original package is broken, the floor life of the product at Surface Mount Information (continued) conditions of <= 30°C and 60% relative humidity varies Lead Free Soldering according to the MSL rating (see J-STD-033A). The shelf life for dry packed SMT packages will be a minimum of 12 The –Z version Austin Lynx Programmable SMT modules are months from the bag seal date, when stored at the following lead-free (Pb-free) and RoHS compliant and are both conditions: < 40° C, < 90% relative humidity. forward and backward compatible in a Pb-free and a SnPb soldering process. Failure to observe the instructions below may result in the failure of or cause damage to the modules Post Solder Cleaning and Drying Considerations and can adversely affect long-term reliability. Post solder cleaning is usually the final circuit-board assembly process prior to electrical board testing. The result Pb-free Reflow Profile of inadequate cleaning and drying can affect both the reliability of a power module and the testability of the Power Systems will comply with J-STD-020 Rev. C finished circuit-board assembly. For guidance on (Moisture/Reflow Sensitivity Classification for Nonhermetic appropriate soldering, cleaning and drying procedures, refer Solid State Surface Mount Devices) for both Pb-free solder to Board Mounted Power Modules: Soldering and Cleaning profiles and MSL classification procedures. This standard Application Note (AN04-001). 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 Per J-STD-020 Rev. C (SAC). The recommended linear reflow profile using 300 Sn/Ag/Cu solder is shown in Figure. 37. Peak Temp 250 Cooling Zone MSL Rating 200 * Min. Time Above 235°C The Austin Lynx Programmable SMT modules have a MSL 150 Heating *Time Above rating of 2a. Zone 217°C 100 Storage and Handling 50 The recommended storage environment and handling procedures for moisture-sensitive surface mount packages 0 is detailed in J-STD-033 Rev. A (Handling, Packing, Shipping Reflow Time (Seconds) and Use of Moisture/Reflow Sensitive Surface Mount Figure 37. Recommended linear reflow profile using Devices). Moisture barrier bags (MBB) with desiccant are Sn/Ag/Cu solder. required for MSL ratings of 2 or greater. These sealed packages should not be broken until time of use. Once the October 7, 2015 ©2015 General Electric Company. All rights reserved. Page 19 Reflow Temp (°C) Data Sheet GE TM Austin Lynx : SMT Non-Isolated DC-DC Power Modules, Programmable 3.0Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A Output Current Ordering Information Please contact your GE Sales Representative for pricing, availability and optional features. Table 2. Device Codes Input Voltage Output Output Efficiency Connector Device Code Range Comcodes Voltage Current 3.3V@ 10A Type AXH010A0X-SR 3.0 – 5.5Vdc 0.75 – 3.63Vdc 10 A 95.0% SMT 108992021 AXH010A0X-SRZ 3.0 – 5.5Vdc 0.75 – 3.63Vdc 10 A 95.0% SMT CC109104948 AXH010A0X3-SR* 3.0 – 5.5Vdc 0.75 – 3.63Vdc 10 A 95.0% SMT 108992038 AXH010A0X3-SRZ* 3.0 – 5.5Vdc 0.75 – 3.63Vdc 10 A 95.0% SMT CC109104931 * Remote sense feature is active and pin 6 is added with code suffix “3” * -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. October 7, 2015 ©2015 General Electric Company. All International rights reserved. Version 1.57