Data Sheet December 18, 2009 Austin LynxTM 24V:Non-isolated Power Modules: 18/20-30/32Vdc input; 3 to 6Vdc & 5 to 15Vdc Output; 30/50W Features RoHS Compliant Compliant to RoHS EU Directive 2002/95/EC (-Z versions) Compliant to ROHS EU Directive 20002/95/EC with lead solder exemption (non-Z versions) Wide input voltage range Applications AXB030: 18 to 30Vdc AXB050: 20 to 32Vdc Output voltage programmable via external resistor AXB030: 3Vdc to 6Vdc AXB050: 5Vdc to 15Vdc High efficiency modules (VIN = 24Vdc) AXB030: 91% at 3.3V full load AXB050: 94% at 12Vdc full load Distributed power architectures Intermediate bus voltage applications Monotonic start-up into pre-bias output Telecommunications equipment Remote On/Off (Positive logic) Wireless Base stations Remote Sense Industrial equipment Small size and low profile: LANs/WANs 33.0 mm x 13.5 mm x 8.28 mm Enterprise Networks (1.30 in x 0.53 in x 0.326 in) Latest generation IC's (DSP, FPGA, ASIC) and Microprocessor powered applications Low output ripple and noise Constant switching frequency Wide operating temperature range (-40C to 85C) Over current and Over temperature protection (nonlatching) UL* 60950-1Recognized, CSA C22.2 No. 60950-103 Certified, and VDE 0805:2001-12 (EN60950-1) Licensed ISO** 9001 and ISO 14001 certified manufacturing facilities Description The Austin LynxTM 24V series SMT power modules are non-isolated DC-DC converters in an industry standard package that can deliver up to 48W of output power with a full load efficiency of 94% at 12Vdc output voltage (VIN = 24Vdc). These modules operate over a wide input voltage range (VIN = 18/20 - 30Vdc) and provide a precisely regulated output voltage from 3 to 6Vdc (AXB030) and 5 to 15Vdc (AXB050), programmable via an external resistor. Standard features include remote On/Off, adjustable output voltage, remote sense, over current and over temperature 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 Document No: DS05-032 ver.1.23 PDF name: lynx_24v_ds.pdf Data Sheet December 18, 2009 Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30/32Vdc input; 3 - 6Vdc & 5 - 15Vdc Output; 30/50W 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 All VIN -0.3 36 Vdc All TA -40 85 C All Tstg -55 125 C Input Voltage Continuous Operating Ambient Temperature (see Thermal Considerations section) Storage Temperature 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 AXB030 VIN 18.0 24.0 30.0 Vdc AXB050 VIN 20.0 24.0 32.0 Vdc All IIN,max 3.5 Adc Vo = 3.3Vdc IIN,No Load 60 mAdc Vo = 12Vdc IIN,No Load 110 mAdc Vo = 3.3Vdc IIN,stand-by 3 mA Vo = 12Vdc IIN,stand-by 3 mA Inrush Transient All I t 2 1 A s Input Reflected Ripple Current, peak-to-peak (5Hz to 20MHz, 1H source impedance; VIN=20V to 30V, IO= IOmax ; See Figure 25) All Input Ripple Rejection (120Hz) All Maximum Input Current (VIN= 20V, VO= 12V, IO=IO, max) Input No Load Current (VIN = 24Vdc, Io = 0, module enabled) Input Stand-by Current (VIN = 24Vdc, module disabled) 50 50 2 mAp-p dB CAUTION: These power modules can be used in a wide variety of applications ranging from simple standalone operation to an integrated part of sophisticated power architectures. To preserve maximum flexibility, no internal fuse has been provided. Also, extensive safety testing has shown that no external fuse is required to protect the unit. However, it is still recommended that some type of current-limiting power source be used to protect the module and evaluated in the end-use equipment. LINEAGE POWER 2 Data Sheet December 18, 2009 Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30/32Vdc input; 3 - 6Vdc & 5 - 15Vdc Output; 30/50W Electrical Specifications (continued) Parameter Output Voltage Set-point Device Symbol Min Typ Max Unit All VO, set -2.0 VO, set +2.0 % VO, set All VO, set -3% +3% % VO, set AXB030 VO 3.0 6.0 Vdc AXB050 VO 5.0 15.0 Vdc (VIN=VN, min, IO=IO, max, TA=25C) Output Voltage (Over all operating input voltage, resistive load, and temperature conditions until end of life) Adjustment Range Selected by an external resistor Output Regulation Line (VIN=VIN, min to VIN, max) All 0.4 % VO, set Load (IO=IO, min to IO, max) All 0.4 % VO, set Temperature (Tref=TA, min to TA, max) All 0.5 1 % VO, set Peak-to-Peak (5Hz to 20MHz bandwidth) AXB030 50 75 mVpk-pk Peak-to-Peak (5Hz to 20MHz bandwidth) AXB050 100 200 mVpk-pk Output Ripple and Noise on nominal output (VIN=VIN, nom and IO=IO, min to IO, max Cout =0.01F ceramic//10Ftantalum capacitors) External Capacitance ESR 1 m AXB030 CO, max 0 1,000 F ESR 10 m AXB030 CO, max 0 3,000 F ESR 1 m AXB050 CO, max 0 1,000 F ESR 10 m AXB050 CO, max 0 2,000 F Vo = 3.3Vdc AXB030 Io 0 10 Adc Vo = 5.0Vdc AXB050 Io 0 8.0 Adc AXB030 Po 33 W AXB050 Po 50 W Output Current (VIN = VIN, nom) Output Power (VIN = VIN, nom) Vo =Vo,,min to Vo,,max Output Short-Circuit Current (VO250mV) ( Hiccup Mode ) Efficiency VIN= VIN, nom, TA=25C IO=IO, max , VO= VO,set Switching Frequency (Fixed) LINEAGE POWER AXB030 IO, s/c 15 Adc AXB050 IO, s/c 20 Adc VO,set = 3.3Vdc 90 % VO,set = 5.0Vdc 93 % % VO,set = 12.0Vdc 95 VO,set = 15.0Vdc 96 All fsw 300 % kHz 3 Data Sheet December 18, 2009 Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30/32Vdc input; 3 - 6Vdc & 5 - 15Vdc Output; 30/50W Electrical Specifications (continued) Parameter Device Symbol Min Typ Max Unit Peak Deviation (Vo = 3.3Vdc) AXB030 Vpk 300 mV Peak Deviation (Vo = 12Vdc) AXB050 Vpk 220 mV All ts 50 s Dynamic Load Response (dIO/dt=5A/s; VIN=VIN, nom TA=25C) Load Change from Io= 50% to 100% of IO,max; No external output capacitors Settling Time (VO<10% peak deviation) (dIO/dt=5A/s; VIN=VIN, nom; TA=25C) Load Change from IO= 100% to 50%of IO, max: No external output capacitors Peak Deviation (Vo = 3.3Vdc) AXB030 Vpk 320 mV Peak Deviation (Vo = 12Vdc) AXB050 Vpk 220 mV All ts 50 s Peak Deviation (Vo = 3.3Vdc) AXB030 Vpk 120 mV Peak Deviation (Vo = 12Vdc) AXB050 Vpk 130 mV All ts 50 s 130 mV 130 mV Settling Time (VO<10% peak deviation) (dIO/dt=5A/s; VIN=VIN, nom; TA=25C) Load Change from Io= 50% to 100% of Io,max; 2x150 F polymer capacitor Settling Time (VO<10% peak deviation) (dIO/dt=5A/s; VIN=VIN, nom; TA=25C) Load Change from Io= 100% to 50%of IO,max: 2x150 F polymer capacitor Peak Deviation (Vo = 3.3Vdc) AXB030 Vpk Peak Deviation (Vo = 12Vdc) AXB050 Vpk All ts Settling Time (VO<10% peak deviation) 50 s General Specifications Parameter Device Calculated MTBF (VIN= VIN, nom, IO= 0.8IO, max, TA=40C) Telecordia SR 332 Issue 1: Method 1, case 3 AXB050 Weight LINEAGE POWER Min Typ Max 8,035,510 5.70 (0.20) Unit Hours g (oz.) 4 Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30/32Vdc input; 3 - 6Vdc & 5 - 15Vdc Output; 30/50W Data Sheet December 18, 2009 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 Input High Current All IIH Input High Voltage All VIH Input Low Current All Input Low Voltage Min Typ Max Unit 10 A VIN-2.5V 30 V IIL 1 mA All VIL -0.3 1.2 V All Tdelay 2 4 8 msec All Tdelay 2 4 8 msec All Trise 2 5 9 msec 3.0 % VO, set On/Off Signal interface (On/Off is open collector/drain logic input; Signal referenced to GND - See feature description section) Device is with suffix "4" - Positive Logic Logic High (On/Off pin open - Module ON) Logic Low (Module OFF) Turn-On Delay and Rise Times (VIN=VIN, nom, IO=IO, max , VO to within 1% of steady state) Case 1: On/Off input is enabled and then input power is applied (delay from instant at which VIN = VIN, min until Vo = 10% of Vo, set) Case 2: Input power is applied for at least one second and then the On/Off input is enabled (delay from instant at which Von/Off is enabled until Vo = 10% of Vo, set) Output voltage Rise time (time for Vo to rise from 10% of Vo, set to 90% of Vo, set) Output voltage overshoot o IO = IO, max; VIN, min - VIN, max, TA = 25 C Remote Sense Range Over temperature Protection 0.5 V 125 135 C AXB030 17 Vdc AXB050 19 Vdc All Tref (See Thermal Consideration section) Input Undervoltage Lockout Turn-on Threshold Turn-off Threshold LINEAGE POWER AXB030 15 Vdc AXB050 17 Vdc 5 Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30/32Vdc input; 3 - 6Vdc & 5 - 15Vdc Output; 30/50W Data Sheet December 18, 2009 Characteristic Curves The following figures provide typical characteristics for the AXB030X module at 3.3V, 10A and 25oC. 95 12 2m/s (400LFM) 10 85 OUTPUT CURRENT, Io (A) EFFICIENCY, () 90 Vin=20V Vin=24V 80 Vin=30V 75 70 0 2 4 6 8 10 LINEAGE POWER 2 0 0 20 40 60 80 100 OUTPUT VOLTAGE VO (V) (1V/div) VOn/off (V) (20V/div) TIME, t (1ms/div) VIN (V) (20V/div) VO (V) (1V/div) Figure 5. Typical Start-up Using Remote On/Off (VIN = 20V, Io = Io,max). OUTPUT VOLTAGE TIME, t (5s /div) Figure 3. Transient Response to Dynamic Load Change from 50% to 100% of full load with di/dt of 5A/s. 1m/s (200LFM) 4 Figure 4. Derating Output Current versus Local Ambient Temperature and Airflow. INPUT VOLTAGE OUTPUT CURRENT, (A) (5A/div) OUTPUT VOLTAGEIO VO (V) (200mV/div) Figure 2. Typical output ripple and noise (VIN = VIN,NOM, Io = Io,max). 0.5m/s (100LFM) AMBIENT TEMPERATURE, TA C On/Off VOLTAGE VO (V) (20mV/div) OUTPUT VOLTAGE TIME, t (1s/div)) NC 6 O OUTPUT CURRENT, IO (A) Figure 1. Converter Efficiency versus Output Current. 8 TIME, t (1ms/div) Figure 6. Typical Start-up Using Input Voltage (VIN = 20V, Io = Io,max). 6 Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30/32Vdc input; 3 - 6Vdc & 5 - 15Vdc Output; 30/50W Data Sheet December 18, 2009 Characteristic Curves (continued) The following figures provide typical characteristics for the AXB050X module at 5V, 8A and 25oC. 9 100 8 OUTPUT CURRENT, Io (A) 95 EFFICIENCY, () 90 85 Vin=24V 80 Vin=20V Vin=30V 75 70 0 2 4 6 8 Figure 9. Transient Response to Dynamic Load change from 50% to 100% of full load with di/dt of 5A/s. LINEAGE POWER 5 200 lfm (1.0m/s) 4 3 2 1 0 30 40 50 60 70 80 90 100 O OUTPUT VOLTAGE VO (V) (2V/div) On/Off VOLTAGE VIN (V) (10V/div) Figure 10. Derating Output Current versus Local Ambient Temperature and Airflow (VIN = VIN,NOM). TIME, t (2.5ms/div) OUTPUT VOLTAGE VO (V) (2V/div) Figure 11. Typical Start-up Using Remote On/Off (VIN = 24V, Io = Io,max). VIN (V) (10V/div) OUTPUT CURRENT OUTPUT VOLTAGE IO (A) (5A/div) VO (V) (200mV/div) TIME, t (5s/div) 100 lfm (0.5m/s) AMBIENT TEMPERATURE, TA C INPUT VOLTAGE VO (V) (50mV/div) OUTPUT VOLTAGE TIME, t (1s/div) Figure 8. Typical output ripple and noise (VIN = VIN,NOM, Io = Io,max). NC 6 20 OUTPUT CURRENT, IO (A) Figure 7. Converter Efficiency versus Output Current. 7 TIME, t (2.5ms/div) Figure 12. Typical Start-up Using Input Voltage (VIN = 20V, Io = Io,max). 7 Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30/32Vdc input; 3 - 6Vdc & 5 - 15Vdc Output; 30/50W Data Sheet December 18, 2009 Characteristic Curves (continued) 100 5 95 4 OUTPUT CURRENT, Io (A) EFFICIENCY, (%) The following figures provide typical characteristics for the AXB050X module at 12V, 4A and 25oC. 90 Vin=20V Vin=24V 85 80 Vin=30V 75 70 0 1 2 OUTPUT CURRENT, IO (A) 3 1 0 30 40 50 60 70 80 90 O AMBIENT TEMPERATURE, TA C 100 TIME, t (2ms/div) OUTPUTVOLTAGE VO (V) (5V/div) Figure 17. Typical Start-up Using Remote On/Off (VIN = VIN,NOM, Io = Io,max). change from 50% to 100% of full load with di/dt of 5A/s. INPUT VOLTAGE VIN (V) (20V/div) OUTPUT CURRENT OUTPUT VOLTAGE IO (A) (2A/div) VO (V) (100mV/div) TIME, t (10s /div) Figure 15. Transient Response to Dynamic Load LINEAGE POWER 2 Figure 16. Derating Output Current versus Local Ambient Temperature and Airflow. TIME, t (1s/div) Figure 14. Typical output ripple and noise (VIN = VIN,NOM, Io = Io,max). 100 lfm (0.5m/s) 20 4 On/Off VOLTAGE OUTPUT VOLTAGE VOn/off (V) (10V/div) VO (V) (5V/div) VO (V) (10mV/div) OUTPUT VOLTAGE Figure 13. Converter Efficiency versus Output Current. NC 3 TIME, t (2ms/div) Figure 18. Typical Start-up Using Input Voltage (VIN = 20V, Io = Io,max). 8 Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30/32Vdc input; 3 - 6Vdc & 5 - 15Vdc Output; 30/50W Data Sheet December 18, 2009 Characteristic Curves (continued) The following figures provide typical characteristics for the AXB050X module at 15V, 3A and 25oC. 4 100 90 Vin=20V Vin=24V 85 80 Vin=30V 75 70 0 0.5 1 1.5 2 2.5 3 OUTPUT CURRENT, Io (A) EFFICIENCY, (%) 95 1 0 20 30 40 50 60 70 80 90 100 Figure 22. Derating Output Current versus Local Ambient Temperature and Airflow. On/Off VOLTAGE OUTPUT VOLTAGE VOn/off (V) (10V/div) VO (V) (5V/div) VO (V) (20mV/div) OUTPUT VOLTAGE TIME, t (2ms/div) OUTPUT VOLTAGE VO (V) (5V/div) Figure 23. Typical Start-up Using Remote On/Off (VIN = VIN,NOM, Io = Io,max). TIME, t (10s /div) Figure 21. Transient Response to Dynamic Load change from 50% to 100% of full load with di/dt of 5A/s. INPUT VOLTAGE VIN (V) (20V/div) OUTPUT CURRENT, OUTPUT VOLTAGE IO (A) (1A/div) VO (V) (50mV/div) 2 AMBIENT TEMPERATURE, TA C TIME, t (1s/div) Figure 20. Typical output ripple and noise (VIN = VIN,NOM, Io = Io,max). LINEAGE POWER NC O OUTPUT CURRENT, IO (A) Figure 19. Converter Efficiency versus Output Current. 3 TIME, t (2.5ms/div) Figure 24. Typical Start-up Using Input Voltage (VIN = 20V, Io = Io,max). 9 Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30/32Vdc input; 3 - 6Vdc & 5 - 15Vdc Output; 30/50W Data Sheet December 18, 2009 Test Configurations Design Considerations Input Filtering CURRENT PROBE TO OSCILLOSCOPE LTEST VIN(+) BATTERY 1H CS CIN 220F Min 150F E.S.R.<0.1 @ 20C 100kHz Output Filtering COM NOTE: Measure input reflected ripple current with a simulated source inductance (LTEST) of 1H. Capacitor CS offsets possible battery impedance. Measure current as shown above. Figure 25. Input Reflected Ripple Current Test Setup. COPPER STRIP VO (+) RESISTIVE LOAD 1uF . 10uF SCOPE COM GROUND PLANE NOTE: All voltage measurements to be taken at the module 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 resistance. Figure 26. Output Ripple and Noise Test Setup. Rdistribution Rcontact Rcontact VIN(+) Rdistribution RLOAD VO Rcontact Rcontact COM Rdistribution VO VIN TM The Austin Lynx 24V SMT module should be connected to a low-impedance source. A highly inductive source can affect the stability of the module. An input capacitance must be placed directly adjacent to the input pin of the module, to minimize input ripple voltage and ensure module stability. Rdistribution The Austin LynxTM 24V SMT module is designed for low output ripple voltage and will meet the maximum output ripple specification with 1 F ceramic and 10 F tantalum capacitors 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 output ripple and noise of the module. Second, the dynamic response characteristics may need to be customized to a particular load step change. To reduce the output ripple and improve the dynamic response to a step load change, additional capacitance at the output can be used. Low ESR polymer and ceramic capacitors are recommended to improve the dynamic response of the module. For stable operation of the module, limit the capacitance to less than the maximum output capacitance as specified in the electrical specification table. Safety Considerations For safety agency approval the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standards, i.e., UL 60950, CSA C22.2 No. 60950-00, EN60950 (VDE 0850) (IEC60950, 3rd edition) Licensed. For the converter output to be considered meeting the requirements of safety extra-low voltage (SELV), the input must meet SELV requirements. The power module has extra-low voltage (ELV) outputs when all inputs are ELV. COM NOTE: All voltage measurements to be taken at the module 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 resistance. Figure 27. Output Voltage and Efficiency Test Setup. VO. IO Efficiency = LINEAGE POWER VIN. IIN x 100 % 10 Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30/32Vdc input; 3 - 6Vdc & 5 - 15Vdc Output; 30/50W Data Sheet December 18, 2009 Feature Description R distrib u tio n Remote On/Off R c o nta c t R c o n ta c t V IN (+ ) TM The Austin Lynx 24V SMT power modules feature an On/Off pin for remote On/Off operation. Positive Logic On/Off signal, device code suffix "4", turns the module ON during a logic High on the On/Off pin and turns the module OFF during a logic Low. For positive logic modules, the circuit configuration for using the On/Off pin is shown in Figure 28. 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 to the module) when the transistor Q1 is in the Off state, the power module is ON. Maximum allowable leakage current of the transistor when Von/off = VIN,max is 10A. Applying a logic-low when the transistor Q1 is turned-On, the power module is OFF. During this state VOn/Off must be less than 1.2V. When not using positive logic On/off pin, leave the pin unconnected or tie to VIN. VIN+ MODULE R2 ON/OFF + I ON/OFF VON/OFF PWM Enable R3 Q1 R LO AD R distrib u tio n R c o nta c t R c o n ta c t COM R d istribu tio n CO M Figure 29. Effective Circuit Configuration for Remote Sense operation. Overcurrent Protection To provide protection in a fault (output overload) condition, the unit is equipped with internal current-limiting circuitry and can endure current limiting continuously. At the point of current-limit inception, the unit enters hiccup mode. The unit operates normally once the output current is brought back into its specified range. The average output current during hiccup is 20% IO, max. At input voltages below the input undervoltage lockout limit, the module operation is disabled. The module will begin to operate at an input voltage above the undervoltage lockout turn-on threshold. Overtemperature Protection Q3 CSS R4 GND S e n se Input Undervoltage Lockout Q2 R1 R d istribu tio n VO _ Figure 28. Remote On/Off Implementation circuit. To provide protection in a fault condition, the unit is equipped with a thermal shutdown circuit. The unit will o shutdown if the overtemperature threshold of 130 C is exceeded at the thermal reference point Tref . The thermal shutdown is not intended as a guarantee that the unit will survive temperatures beyond its rating. Once the unit goes into thermal shutdown it will then wait to cool before attempting to restart. Remote Sense Output Voltage Programming The Austin Lynx 24V 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 29). The voltage between the Sense pin and Vo pin must not exceed 0.5V. The output voltage of the Austin Lynx 24V can be programmed to any voltage in the specified ranges by connecting a resistor (shown as Rtrim in Figure 30) between the Trim and GND pins of the module. Without an external resistor between the Trim and GND pins, the output of the module will be at the low-end of the specified range. To calculate the value of the trim resistor, Rtrim for a desired output voltage, use the following equations: The amount of power delivered by the module is defined as the output voltage multiplied by the output current (Vo x Io). When using Remote Sense, the output voltage of the module can increase which increases the power output of 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, connect the Remote Sense pin to the output of the module. LINEAGE POWER For the AX030A0X modules, 10500 Rtrim = - 3480 Vo - 3.018 11 Data Sheet December 18, 2009 Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30/32Vdc input; 3 - 6Vdc & 5 - 15Vdc Output; 30/50W Feature Descriptions (continued) Vo Rmargin-down Output Voltage Programming (continued) For the AX050A0X modules, Austin Lynx or Lynx II Series 10500 Rtrim = - 1000 Vo - 5.021 Q2 Trim where, Rtrim is the external resistor in and Vo is the desired output voltage Rmargin-up Rtrim V IN(+) V O(+) Q1 GND ON/OFF LOAD TRIM Rtrim Figure 31. Circuit Configuration for margining the output voltage. GND Figure 30. Circuit configuration to program output voltage using an external resistor. By using a 0.5% tolerance trim resistor with a TC of 100ppm, a set point tolerance of 2% can be achieved as specified in the electrical specifications. The POL Programming Tool, available at www.lineagepower.com under the Design Tools section, helps determine the required external trim resistor needed for a specific output voltage. Voltage Margining Output voltage margining can be implemented in the Austin Lynx 24V 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 output pin for margining-down. Figure 31 shows the circuit configuration for output voltage margining. The POL Programming Tool, available at www.lineagepower.com under the Design Tools section, also calculates the values of Rmargin-up and Rmargin-down for a specific output voltage and % margin. Please consult your local Lineage Power technical representative for additional details. LINEAGE POWER 12 Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30/32Vdc input; 3 - 6Vdc & 5 - 15Vdc Output; 30/50W Data Sheet December 18, 2009 Thermal Considerations Power modules operate in a variety of thermal environments; however, sufficient cooling should always be provided to help ensure reliable operation. 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 32. Note that the 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. 25.4_ (1.0) Wind Tunnel PWBs Power Module 76.2_ (3.0) Figure 33. Tref Temperature measurement location. The thermal reference point, Tref used in the specifications is shown in Figure 33. For reliable operation this temperature should not exceed 125oC. 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 BoardMounted Power Modules" for a detailed discussion of thermal aspects including maximum device temperatures. x 12.7_ (0.50) Probe Location for measuring airflow and ambient temperature Air flow Figure 32. Thermal Test Set-up. LINEAGE POWER 13 Data Sheet December 18, 2009 Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30/32Vdc input; 3 - 6Vdc & 5 - 15Vdc Output; 30/50W 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.) Non Co-planarity (max): 0.15 (0.006) LINEAGE POWER 14 Data Sheet December 18, 2009 Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30/32Vdc input; 3 - 6Vdc & 5 - 15Vdc Output; 30/50W 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.) LINEAGE POWER 15 Data Sheet December 18, 2009 Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30/32Vdc input; 3 - 6Vdc & 5 - 15Vdc Output; 30/50W Packaging Details The Austin LynxTM 24V SMT versions are supplied in tape & reel as standard. Modules are shipped in quantities of 250 modules per reel. Tape Dimensions Reel Dimensions Outside diameter: Inside diameter: Tape Width: LINEAGE POWER 330.2 mm (13.00) 177.8 mm (7.00") 44.0 mm (1.73") 16 Data Sheet December 18, 2009 Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30/32Vdc input; 3 - 6Vdc & 5 - 15Vdc Output; 30/50W Surface Mount Information Pick and Place TM The Austin Lynx 24V SMT modules use open frame construction and are designed for fully automated assembly process. The modules are fitted with a label designed to provide a large surface area for pick and place operation. The label meets all the requirements for surface mount processing, as well as safety standards, and is able to withstand reflow temperatures of up to 300oC. The label also carries product information such as product code, serial number and location of manufacture. 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 reflow temperatures are limited to less than o o 235 C. 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. 300 P eak Temp 235oC Figure 34. Pick and place Location. REFLOW TEMP (C) 250 Nozzle Recommendations For further information please contact your local Lineage Power technical representative. Tin Lead Soldering TM The Austin Lynx 24V 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 LINEAGE POWER 150 So ak zo ne 30-240s 100 Tlim above 205oC P reheat zo ne max 4oCs -1 50 0 REFLOW TIME (S) Figure 35. Reflow Profile for Tin/Lead (Sn/Pb) process. 240 235 MAX TEMP SOLDER (C) 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 placement speed should be considered to optimize this process. The minimum recommended nozzle diameter for reliable operation is 6mm. The maximum nozzle outer diameter, which will safely fit within the allowable component spacing, is 9 mm. Oblong or oval nozzles up to 11 x 9 mm may also be used within the space available. Co o ling zo ne 1-4oCs -1 Heat zo ne max 4oCs -1 200 230 225 220 215 210 205 200 0 10 20 30 40 50 60 Figure 36. Time Limit Curve Above 205oC for Tin/Lead (Sn/Pb) process. 17 Data Sheet December 18, 2009 Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30/32Vdc input; 3 - 6Vdc & 5 - 15Vdc Output; 30/50W Surface Mount Information (continued) Lead Free Soldering Pb-free Reflow Profile Power Systems will comply with J-STD-020 Rev. C (Moisture/Reflow Sensitivity Classification for Nonhermetic Solid State Surface Mount Devices) for both Pb-free solder profiles and MSL classification procedures. This standard provides a recommended forced-air-convection reflow profile based on the volume and thickness of the package (table 4-2). The suggested Pb-free solder paste is Sn/Ag/Cu (SAC). The recommended linear reflow profile using Sn/Ag/Cu solder is shown in Figure. 37. 300 Per J-STD-020 Rev. C Peak Temp 260C 250 Reflow Temp (C) The -Z version Austin Lynx 24V SMT modules are lead-free (Pb-free) and RoHS compliant and are both 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 and can adversely affect long-term reliability. 200 150 * Min. Time Above 235C 15 Seconds Heating Zone 1C/Second Cooling Zone *Time Above 217C 60 Seconds 100 50 0 Reflow Time (Seconds) Figure 37. Recommended linear reflow profile using Sn/Ag/Cu solder. MSL Rating The Austin Lynx 24V SMT modules have an MSL rating of 2. Storage and Handling The recommended storage environment and handling procedures for moisture-sensitive surface mount packages is detailed in J-STD-033 Rev. A (Handling, Packing, Shipping and Use of Moisture/Reflow Sensitive Surface Mount Devices). Moisture barrier bags (MBB) with desiccant are required for MSL ratings of 2 or greater. These sealed packages should not be broken until time of use. Once the original package is broken, the floor life of the product at conditions of 30C and 60% relative humidity varies according to the MSL rating (see J-STD-033A). The shelf life for dry packed SMT packages will be a minimum of 12 months from the bag seal date, when stored at the following conditions: < 40 C, < 90% relative humidity. Post Solder Cleaning and Drying Considerations Post solder cleaning is usually the final circuit-board assembly process prior to electrical board testing. The result of inadequate cleaning and drying can affect both the reliability of a power module and the testability of the finished circuit-board assembly. For guidance on appropriate soldering, cleaning and drying procedures, refer to Board Mounted Power Modules: Soldering and Cleaning Application Note (AN04-001). LINEAGE POWER 18 Data Sheet December 18, 2009 Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30/32Vdc input; 3 - 6Vdc & 5 - 15Vdc Output; 30/50W Ordering Information Please contact your Lineage Power Sales Representative for pricing, availability and optional features. Table 1. Device Codes Device Code Input Voltage Range Output Voltage Output Power On/Off Logic Connector Type Comcodes AXB030X43-SR 18 - 30Vdc 3.0 - 6.0Vdc 30W Positive SMT 108992673 AXB030X43-SRZ 18 - 30Vdc 3.0 - 6.0Vdc 30W Positive SMT CC109106738 AXB050X43-SR 20 - 32Vdc 5.0 - 15.0Vdc 50W Positive SMT 108992681 AXB050X43-SRZ 20 - 32Vdc 5.0 - 15.0Vdc 50W Positive SMT CC109104857 -Z refers to RoHS-compliant codes Asia-Pacific Headquarters Tel: +65 6593 7211 World Wide Headquarters Lineage Power Corporation 601 Shiloh Road, Plano, TX 75074, USA +1-800-526-7819 (Outside U.S.A.: +1-972-244-9428) www.lineagepower.com e-mail: techsupport1@lineagepower.com Europe, Middle-East and Africa Headquarters Tel: +49 898 780 672 80 India Headquarters Tel: +91 80 28411633 Lineage Power reserves the right to make changes to the product(s) or information contained herein without notice. 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. Lineage Power DC-DC products are protected under various patents. Information on these patents is available at www.lineagepower.com/patents. (c) 2009 Lineage Power Corporation, (Plano, Texas) All International Rights Reserved. LINEAGE POWER 19 Document No: DS05-032 ver.1.23 PDF name: lynx_24v_ds.pdf