Data Sheet GE TM Austin Lynx II: SMT Non-Isolated DC-DC Power Modules 2.4Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A 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) TM  Flexible output voltage sequencing EZ-SEQUENCE  Delivers up to 10A output current  High efficiency – 95% at 3.3V full load (VIN = 5.0V)  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 = 15.7M 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  Servers and storage applications 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  Temperature Regulation: 0.4 % (typical) Microprocessor powered applications  Remote On/Off  Remote sense  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 II 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 = 2.4 – TM TM 5.5Vdc). The Austin Lynx II series has a sequencing feature, EZ-SEQUENCE that enable designers to implement various types of output voltage sequencing when powering multiple voltages on a board. * 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 2, 2015 ©2015 General Electric Company. All rights reserved. Data Sheet GE TM Austin Lynx II: SMT Non-Isolated DC-DC Power Modules 2.4Vdc –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 Sequencing voltage All Vseq -0.3 VIN,max Vdc 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 ≤ VIN - 0.5 VIN 2.4  5.5 Vdc Maximum Input Current All IIN,max 10 Adc (V =2.4V to 5.5V, I =I ) IN O O, max Input No Load Current Vo = 0.75Vdc I 25 mA IN,No load (V = 5.0Vdc, I = 0, module enabled) Vo = 3.3Vdc I 30 mA IN O 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 Configurations) 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 2, 2015 ©2015 General Electric Company. All rights reserved. Page 2 Data Sheet GE TM Austin Lynx II: SMT Non-Isolated DC-DC Power Modules 2.4Vdc –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 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  8 15 mVrms Peak-to-Peak (5Hz to 20MHz bandwidth) All  25 50 mVpk-pk External Capacitance ESR ≥ 1 mΩ All CO, max   1000 μF ESR ≥ 10 mΩ All CO, max   5000 μF Output Current All I 0 10 Adc o Output Current Limit Inception (Hiccup Mode ) All I  200  % I O, lim o (V = 90% of V ) O O, set Output Short-Circuit Current All IO, s/c  3.0  Adc (VO≤250mV) ( Hiccup Mode ) Efficiency VO,set = 0.75Vdc η 81.5 % VIN= VIN, nom, TA=25°C VO, set = 1.2Vdc η 87.0 % IO=IO, max , VO= VO,set VO,set = 1.5Vdc η 89.0 % VO,set = 1.8Vdc η 90.0 % VO,set = 2.5Vdc η 93.0 % VO,set = 3.3Vdc η 94.0 % Switching Frequency All fsw  300  kHz Dynamic Load Response (dIo/dt=2.5A/µs; V = V ; T =25°C) All Vpk  250  mV IN IN, nom A Load Change from Io= 50% to 100% of Io,max; 1μF ceramic// 10 μF tantalum Peak Deviation Settling Time (Vo<10% peak deviation) All ts  50  µs (dIo/dt=2.5A/µs; V = V ; T =25°C) All Vpk  250  mV IN IN, nom A 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  50  µs October 2, 2015 ©2015 General Electric Company. All rights reserved. Page 3 Data Sheet GE TM Austin Lynx II: SMT Non-Isolated DC-DC Power Modules 2.4Vdc –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 60 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  60  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) 15,726,300 Hours Weight  2.8 (0.1)  g (oz.) October 2, 2015 ©2015 General Electric Company. All rights reserved. Page 4 Data Sheet GE TM Austin Lynx II: SMT Non-Isolated DC-DC Power Modules 2.4Vdc –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 Device code with Suffix “4” – Positive logic (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 Device Code with no suffix – Negative Logic (On/OFF pin is open collector/drain logic input with external pull-up resistor; signal referenced to GND) Input High Voltage (Module OFF) All VIH 1.5 ― V Vdc IN,max Input High Current All IIH 0.2 1 mA Input Low Voltage (Module ON) All VIL -0.2 ― 0.3 Vdc Input low Current All IIL ― 10 μA 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 =V until Vo=10% of Vo,set) instant at which VIN IN, min 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) Sequencing Delay time Delay from VIN, min to application of voltage on SEQ pin All TsEQ-delay 10 msec Tracking Accuracy (Power-Up: 2V/ms) All |VSEQ –Vo | 100 200 mV (Power-Down: 1V/ms) All |VSEQ –Vo | 200 400 mV (VIN, min to VIN, max; IO, min to IO, max VSEQ < Vo) 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 2, 2015 ©2015 General Electric Company. All rights reserved. Page 5 Data Sheet GE TM Austin Lynx II: SMT Non-Isolated DC-DC Power Modules 2.4Vdc –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 II 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 (Vout = 0.75Vdc). = 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 (Vout = 1.2Vdc). = 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 Figure3. Converter Efficiency versus Output Current (Vout Figure 6. Converter Efficiency versus Output Current (Vout = 1.5Vdc). = 3.3Vdc). October 2, 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 II: SMT Non-Isolated DC-DC Power Modules 2.4Vdc –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 II 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 Figure 11. Transient Response to Dynamic Load Change from 100% to 50% of full load (Vo = 3.3 Vdc). (Vin = 5.0V dc, Vo = 0.75, Vdc, Io=10A). TIME, t (2µs/div) TIME, t (20µs/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 = 5.0V dc, Vo = 3.3 Vdc, Io=10A). μF Polymer Capacitors). October 2, 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) (5A/div) VO (V) (50mV/div) IO (A) (5A/div) VO (V) (200mV/div) IO (A) (5A/div) VO (V) (200mV/div) Data Sheet GE TM Austin Lynx II: SMT Non-Isolated DC-DC Power Modules 2.4Vdc –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 II 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 Figure 17. Typical Start-Up with Prebias (Vin = 3.3Vdc, Vo = 1.8Vdc, Io = 1A, Vbias =1.0Vdc). (Vin = 5.5 Vdc, Vo = 3.3Vdc, Io = 10A). TIME, t (2 ms/div) TIME, t (10ms/div) Figure 15. Typical Start-Up Using Remote On/Off with Figure 18. Output short circuit Current external capacitors (Vin = 5.5Vdc, Vo = 3.3Vdc, Io = 10A, Co (Vin = 5.0Vdc, Vo = 0.75Vdc). = 1050µF). October 2, 2015 ©2015 General Electric Company. All rights reserved. Page 8 OUTPUT VOLTAGE On/Off VOLTAGE OUTPUT VOLTAGE On/Off VOLTAGE OUTPUT CURRENT, OUTPUT VOLTAGE VOV) (1V/div) VOn/off (V) (2V/div) VOV) (1V/div) VOn/off (V) (2V/div) IO (A) (5A/div) VO (V) (50mV/div) OUTPUT CURRENT, OUTPUT VOLTAGE On/Off VOLTAGE OUTPUT VOLTAGE INPUT VOLTAGE IO (A) (10A/div) VOV) (1V/div) VOn/off (V) (2V/div) VOV) (1V/div) VNN (V) (2V/div) Data Sheet GE TM Austin Lynx II: SMT Non-Isolated DC-DC Power Modules 2.4Vdc –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 II 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, TA C AMBIENT TEMPERATURE, TA C Figure 19. Derating Output Current versus Local Ambient Figure 22. Derating Output Current versus Local Ambient Temperature and Airflow (Vin = 5.0, Vo=0.75Vdc). 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 Ambient Temperature and Airflow (Vin = 5.0Vdc, Vo=1.8 Vdc). 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, TA C Figure 21. Derating Output Current versus Local Ambient Temperature and Airflow (Vin = 5.0Vdc, Vo=2.5 Vdc). October 2, 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 II: SMT Non-Isolated DC-DC Power Modules 2.4Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A Output Current Test Configurations Design Considerations Input Filtering CURRENT PROBE TO OSCILLOSCOPE TM The Austin Lynx II SMT module should be connected to a low LTEST ac-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 3x150 µF polymer capacitors in parallel with 2 x 47 µF ceramic capacitor at full load. COPPER STRIP 160 3.3Vin V (+) RESISTIVE 140 O 5Vin LOAD 120 1uF . 10uF SCOPE 100 COM 80 GROUND PLANE 60 NOTE: All voltage measurements to be taken at the module terminals, as shown above. If sockets are used then 40 Kelvin connections are required at the module terminals to avoid measurement errors due to socket contact resistance. 20 Figure 25. Output Ripple and Noise Test Setup. 0 0 0.5 1 1.5 2 2.5 3 3.5 Rdistribution Rcontact Rcontact Rdistribution Output Voltage (Vdc) VIN(+) VO Figure 27. Input ripple voltage for various outputs with 1x22 µF ceramic capacitor at the input (full-load). RLOAD V V IN O 160 3.3Vin 140 5Vin R R R R distribution contact contact distribution 120 COM COM 100 NOTE: All voltage measurements to be taken at the module 80 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 60 resistance. 40 Figure 26. Output Voltage and Efficiency Test Setup. 20 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 outputs with 1x47 µF ceramic capacitor at the input (full load). October 2, 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 II: SMT Non-Isolated DC-DC Power Modules 2.4Vdc –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 II SMT module is designed for low output requirements of the end-use safety agency standards, i.e., UL ripple voltage and will meet the maximum output ripple 60950-1, CSA C22.2 No. 60950-1-03, and VDE 0850:2001-12 specification with 1 µF ceramic and 10 µF tantalum capacitors (EN60950-1) Licensed. at the output 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 For the converter output to be considered meeting the output ripple and noise of the module. Second, the dynamic requirements of safety extra-low voltage (SELV), the input must response characteristics may need to be customized to a meet SELV requirements. The power module has extra-low particular load 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 2, 2015 ©2015 General Electric Company. All rights reserved. Page 11 Data Sheet GE TM Austin Lynx II: SMT Non-Isolated DC-DC Power Modules 2.4Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A Output Current Feature Description VIN+ MODULE Remote On/Off R pull-up TM The Austin Lynx II SMT power modules feature an On/Off pin I ON/OFF for remote On/Off operation. Two On/Off logic options are ON/OFF TM available in the Austin Lynx II series modules. Positive Logic + PWM Enable On/Off signal, device code suffix “4”, turns the module ON V ON/OFF R1 during a logic High on the On/Off pin and turns the module OFF during a logic Low. Negative logic On/Off signal, no device Q2 CSS code suffix, turns the module OFF during logic High on the Q1 On/Off pin and turns the module ON during logic Low. R2 For positive logic modules, the circuit configuration for using GND _ the On/Off pin is shown in Figure 29. The On/Off pin is an open collector/drain logic input signal (Von/Off) that is referenced to ground. During a logic-high (On/Off pin is pulled high internal Figure 30. Circuit configuration for using negative logic to the module) when the transistor Q1 is in the Off state, the On/OFF. power module is ON. Maximum allowable leakage current of the transistor when Von/off = VIN,max is 10µA. Applying a logic- Overcurrent Protection low when the transistor Q1 is turned-On, the power module is OFF. During this state VOn/Off must be less than 0.3V. When To provide protection in a fault (output overload) condition, the not using positive logic On/off pin, leave the pin unconnected unit is equipped with internal current-limiting circuitry and can or tie to VIN. endure current limiting continuously. At the point of current-limit inception, the unit enters hiccup mode. The unit operates normally once the output current is brought back into VIN+ MODULE its specified range. The typical average output current during R2 hiccup is 3.0A. ON/OFF Q2 Input Undervoltage Lockout + R1 V At input voltages below the input undervoltage lockout limit, ON/OFF I ON/OFF PWM Enable module operation is disabled. The module will begin to operate R3 at an input voltage above the undervoltage lockout turn-on threshold. Q1 Q3 CSS Overtemperature Protection R4 To provide protection in a fault condition, the unit is equipped with a thermal shutdown circuit. The unit will GND _ o shutdown if the thermal reference point T , exceeds 125 C ref (typical), but the thermal shutdown is not intended as a Figure 29. Circuit configuration for using positive logic guarantee that the unit will survive temperatures beyond its On/OFF. rating. The module will automatically restarts after it cools down. For negative logic On/Off devices, the circuit configuration is Output Voltage Programming shown is Figure 30. The On/Off pin is pulled high with an TM The output voltage of the Austin Lynx II SMT can be external pull-up resistor (typical Rpull-up = 5k, +/- 5%). When programmed to any voltage from 0.75 Vdc to 3.63 Vdc by transistor Q1 is in the Off state, logic High is applied to the connecting a single resistor (shown as Rtrim in Figure 31) On/Off pin and the power module is Off. The minimum On/off between the TRIM and GND pins of the module. Without an voltage for logic High on the On/Off pin is 1.5Vdc. To turn the external resistor between the TRIM pin and the ground, the module ON, logic Low is applied to the On/Off pin by turning output voltage of the module is 0.7525 Vdc. To calculate the ON Q1. When not using the negative logic On/Off, leave the value of the resistor Rtrim for a particular output voltage Vo, pin unconnected or tie to GND. use the following equation:  21070  Rtrim= − 5110Ω   Vo− 0.7525   October 2, 2015 ©2015 General Electric Company. All rights reserved. Page 12 Data Sheet GE TM Austin Lynx II: SMT Non-Isolated DC-DC Power Modules 2.4Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A Output Current circuit configuration for output voltage margining. The POL Feature Descriptions (continued) Programming Tool, available at www.gecriticalpower.com under the Design Tools section, also calculates the values of Output Voltage Programming (continued) R and R for a specific output voltage and % margin-up margin-down For example, to program the output voltage of the Austin margin. Please consult your local GE technical representative TM Lynx II module to 1.8 Vdc, Rtrim is calculated is follows: for additional details. 21070   Rtrim= − 5110Ω   1.8− 0.7525 Vo   Rmargin-down Rtrim= 15.004kΩ Austin Lynx or Lynx II Series Q2 V (+) V (+) IN O Trim Rmargin-up LOAD ON/OFF TRIM Rtrim R trim Q1 GND GND Figure 31. Circuit configuration to program output voltage using an external resistor. Figure 32. Circuit Configuration for margining Output voltage. Table 1 provides Rtrim values required for some common output voltages. Table 1 VO, (V) Rtrim (KΩ) 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 II modules by connecting a resistor, R , from the margin-up Trim pin to the ground pin for margining-up the output voltage and by connecting a resistor, R , from the Trim pin to margin-down the Output pin for margining-down. Figure 32 shows the October 2, 2015 ©2015 General Electric Company. All rights reserved. Page 13 Data Sheet GE TM Austin Lynx II: SMT Non-Isolated DC-DC Power Modules 2.4Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A Output Current The amount of power delivered by the module is defined as the Feature Descriptions (continued) output voltage multiplied by the output current (Vo x Io). When Voltage Sequencing using Remote Sense, the output voltage of the module can TM increase, which if the same output is maintained, increases the The Austin Lynx II series of modules include a sequencing TM feature, EZ-SEQUENCE that enables users to implement power output by the module. Make sure that the maximum various types of output voltage sequencing in their output power of the module remains at or below the maximum applications. This is accomplished via an additional rated power. When the Remote Sense feature is not being sequencing pin. When not using the sequencing feature, either used, connect the Remote Sense pin to output pin of the tie the SEQ pin to VIN or leave it unconnected. module. When an analog voltage is applied to the SEQ pin, the output R R R R distribution contact contact distribution VIN(+) VO voltage tracks this voltage until the output reaches the set- point voltage. The SEQ voltage must be set higher than the Sense set-point voltage of the module. The output voltage follows the R LOAD voltage on the SEQ pin on a one-to-one volt basis. By connecting multiple modules together, customers can get Rdistribution Rcontact Rcontact Rdistribution multiple modules to track their output voltages to the voltage COM COM applied on the SEQ pin. Figure 33. Remote sense circuit configuration. For proper voltage sequencing, first, input voltage is applied to the module. The On/Off pin of the module is left unconnected (or tied to GND for negative logic modules or tied to VIN for positive logic modules) so that the module is ON by default. After applying input voltage to the module, a minimum of 10msec delay is required before applying voltage on the SEQ pin. During this time, potential of 50mV (± 10 mV) is maintained on the SEQ pin. After 10msec delay, an analog voltage is applied to the SEQ pin and the output voltage of the module will track this voltage on a one-to-one volt bases until output reaches the set-point voltage. To initiate simultaneous shutdown of the modules, the SEQ pin voltage is lowered in a controlled manner. Output voltage of the modules tracks the voltages below their set-point voltages on a one-to-one basis. A valid input voltage must be maintained until the tracking and output voltages reach ground potential. TM When using the EZ-SEQUENCE feature to control start-up of the module, pre-bias immunity feature during start-up is disabled. The pre-bias immunity feature of the module relies on the module being in the diode-mode during start-up. When TM using the EZ-SEQUENCE feature, modules goes through an internal set-up time of 10msec, and will be in synchronous rectification mode when voltage at the SEQ pin is applied. This will result in sinking current in the module if pre-bias voltage is present at the output of the module. When pre-bias immunity TM during start-up is required, the EZ-SEQUENCE feature must be disabled. For additional guidelines on using EZ- TM TM SEQUENCE feature of Austin Lynx II, contact the GE technical representative for preliminary application note on output voltage sequencing using Austin Lynx II series. Remote Sense TM The Austin Lynx II SMT power modules have a Remote Sense feature to minimize the effects of distribution losses by regulating the voltage at the Remote Sense pin (See Figure 33). The voltage between the Sense pin and Vo pin must not exceed 0.5V. October 2, 2015 ©2015 General Electric Company. All rights reserved. Page 14 Data Sheet GE TM Austin Lynx II: SMT Non-Isolated DC-DC Power Modules 2.4Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A Output Current Thermal Considerations 25.4_ Wind Tunnel (1.0) Power modules operate in a variety of thermal environments; however, sufficient cooling should always be provided to help PWBs ensure reliable operation. Power Module Considerations include ambient temperature, airflow, module power dissipation, and the need for increased reliability. A reduction in the operating temperature of the module will result in an increase in reliability. The thermal data presented here is based on physical measurements taken in a wind tunnel. The test set-up is shown in Figure 35. Note that the 76.2_ airflow is parallel to the long axis of the module as shown in (3.0) figure 34. The derating data applies to airflow in either x direction of the module’s long axis. Probe Location for measuring 8.3_ airflow and (0.325) ambient temperature Air flow Figure 35. 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 (T ) for airflow conditions ranging A from natural convection and up to 2m/s (400 ft./min) are shown in the Characteristics Curves section. Figure 34. T Temperature measurement location. ref The thermal reference point, Tref used in the specifications is shown in Figure 34. For reliable operation this temperature o should not exceed 115 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. October 2, 2015 ©2015 General Electric Company. All rights reserved. Page 15 Data Sheet GE TM Austin Lynx II: SMT Non-Isolated DC-DC Power Modules 2.4Vdc –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.) Top View Side View Bottom View October 2, 2015 ©2015 General Electric Company. All rights reserved. Page 16 Data Sheet GE TM Austin Lynx II: SMT Non-Isolated DC-DC Power Modules 2.4Vdc –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 SEQ 4 GND 5 VOUT 6 Trim 7 Sense October 2, 2015 ©2015 General Electric Company. All rights reserved. Page 17 Data Sheet GE TM Austin Lynx II: SMT Non-Isolated DC-DC Power Modules 2.4Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A Output Current Packaging Details TM The Austin Lynx II SMT version is supplied in tape & reel as standard. Modules are shipped in quantities of 250 modules per reel. Pick Point 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 2, 2015 ©2015 General Electric Company. All rights reserved. Page 18 Data Sheet GE TM Austin Lynx II: SMT Non-Isolated DC-DC Power Modules 2.4Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A Output Current Surface Mount Information Pick and Place TM The Austin Lynx II SMT modules use an open frame construction and are designed for a fully automated 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. Nozzle Recommendations The module weight has been kept to a minimum by using REFLOW TIME (S) open frame construction. Even so, these modules have a relatively large mass when compared to conventional SMT Figure 36. Reflow Profile for Tin/Lead (Sn/Pb) process. 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 fit within the allowable component spacing, is 8 mm max. Tin Lead Soldering TM The Austin Lynx II 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 o application board assembly. The following instructions must Figure 37. Time Limit Curve Above 205 C Reflow for Tin be observed when soldering these units. Failure to observe Lead (Sn/Pb) process. 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 infrared), or a combination of convection/IR. For reliable soldering the solder reflow profile should be established by accurately measuring the modules CP connector temperatures. October 2, 2015 ©2015 General Electric Company. All rights reserved. Page 19 MAX TEMP SOLDER (°C) REFLOW TEMP (°C) Data Sheet GE TM Austin Lynx II: SMT Non-Isolated DC-DC Power Modules 2.4Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 10A Output Current Storage and Handling Surface Mount Information (continued) The recommended storage environment and handling Lead Free Soldering procedures for moisture-sensitive surface mount packages is detailed in J-STD-033 Rev. A (Handling, Packing, Shipping The –Z version Austin Lynx II SMT modules are lead-free (Pb- and Use of Moisture/Reflow Sensitive Surface Mount free) and RoHS compliant and are both forward and Devices). Moisture barrier bags (MBB) with desiccant are backward compatible in a Pb-free and a SnPb soldering required for MSL ratings of 2 or greater. These sealed process. Failure to observe the instructions below may packages should not be broken until time of use. Once the result in the failure of or cause damage to the modules and original package is broken, the floor life of the product at can adversely affect long-term reliability. conditions of <= 30°C and 60% relative humidity varies according to the MSL rating (see J-STD-033A). The shelf life Pb-free Reflow Profile for dry packed SMT packages will be a minimum of 12 months from the bag seal date, when stored at the following Power Systems will comply with J-STD-020 Rev. C conditions: < 40° C, < 90% relative humidity. (Moisture/Reflow Sensitivity Classification for Nonhermetic Solid State Surface Mount Devices) for both Pb-free solder Post Solder Cleaning and Drying Considerations profiles and MSL classification procedures. This standard provides a recommended forced-air-convection reflow Post solder cleaning is usually the final circuit-board profile based on the volume and thickness of the package assembly process prior to electrical board testing. The result (table 4-2). The suggested Pb-free solder paste is Sn/Ag/Cu of inadequate cleaning and drying can affect both the (SAC). The recommended linear reflow profile using reliability of a power module and the testability of the Sn/Ag/Cu solder is shown in Figure. 38. finished circuit-board assembly. For guidance on appropriate soldering, cleaning and drying procedures, refer to Board Mounted Power Modules: Soldering and Cleaning MSL Rating Application Note (AN04-001). The Austin Lynx II SMT modules have a MSL rating of 2a. 300 Per J-STD-020 Rev. C Peak Temp 260°C 250 Cooling 200 Zone * Min. Time Above 235°C 15 Seconds 150 Heating Zone *Time Above 217°C 1°C/Second 60 Seconds 100 50 0 Reflow Time (Seconds) Figure 38. Recommended linear reflow profile using Sn/Ag/Cu solder. October 2, 2015 ©2015 General Electric Company. All rights reserved. Page 20 Reflow Temp (°C) Data Sheet GE TM Austin Lynx II: SMT Non-Isolated DC-DC Power Modules 2.4Vdc –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 Output Output Efficiency On/Off Connector Voltage Range Comcodes Device Code Voltage Current 3.3V@ 10A Logic Type ATH010A0X3-SR 2.4 – 5.5Vdc 0.75 – 3.63Vdc 10 A Negative SMT 108987520 95% ATH010A0X3-SRZ 2.4 – 5.5Vdc 0.75 – 3.63Vdc 10 A Negative SMT CC109104543 95% ATH010A0X43-SR 2.4 – 5.5Vdc 0.75 – 3.63Vdc 10 A Positive SMT 108988333 95% ATH010A0X43-SRZ 2.4 – 5.5Vdc 0.75 – 3.63Vdc 10 A Positive SMT 108996823 95% -Z refers to RoHS compliant codes 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 2, 2015 ©2015 General Electric Company. All International rights reserved. Version 1.06