Data Sheet GE JRCW450U Orca* Series; DC-DC Converter Power Modules 36–75 Vdc Input; 48Vdc Output; 450W Output Features RoHS Compliant  Compliant to RoHS II EU Directive 2011/65/EC (-Z versions)  Compliant to REACH Directive (EC) No 1907/2006 3  High power density: 166 W/in  Very high efficiency: >94% Typ at Full Load  Industry standard half-brick pin-out  Low output ripple and noise  Industry standard half-brick footprint 57.7mm x 60.7mm x 12.8mm (2.27” x 2.39” x 0.504”)  Remote Sense  2:1 input voltage range  Single tightly regulated output Applications  Constant switching frequency  RF Power Amplifier  Constant Current Overcurrent limit  Wireless Networks  Latch after short circuit fault shutdown  Switching Networks  Over temperature protection auto restart  Output voltage adjustment trim, 28.8V to 57.6V dc dc Options  Wide operating case temperature range (-40°C to 100°C)  Output OCP/OVP auto restart §  CE mark meets 2006/95/EC directives  Shorter pins # †  ANSI/UL 60950-1, 2nd Ed. Recognized, CSA C22.2 No. ‡  Unthreaded heat sink holes 60950-1-07 Certified, and VDE 0805-1 (EN60950-1, 2nd Ed.) Licensed **  ISO 9001 and ISO 14001 certified manufacturing facilities Description The JRCW450U Orca series of dc-dc converters are a new generation of isolated, very high efficiency DC/DC power modules providing up to 450W output power in an industry standard half-brick size footprint, which makes it an ideal choice for high voltage and high power applications. Threaded-through holes are provided to allow easy mounting or addition of a heat sink for high-temperature applications. The output is fully isolated from the input, allowing versatile polarity configurations and grounding connections. * Trademark of the General Electric Company # 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 August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 1 Data Sheet GE JRCW450U Orca Series; DC-DC Converter Power Modules 36–75 Vdc Input; 48.0Vdc Output; 450W Output 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 Continuous All VIN -0.3 80 Vdc Transient, operational (≤100 ms) All VIN,trans -0.3 100 Vdc Operating Case Temperature All Tc -40 100 °C (See Thermal Considerations section, Figure 16) Storage Temperature All T -55 125 °C stg I/O Isolation Voltage: Input to Case, Input to Output All 1500 V   dc Output to Case All 500 V   dc Electrical Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. Parameter Device Symbol Min Typ Max Unit Operating Input Voltage All VIN 36 48 75 Vdc (see Figure 12 for V when using trim-up feature) IN MIN Maximum Input Current (V =36V to 75V, I =I) All I 14.0 A IN O O, max IN,max dc 2 2 Inrush Transient All It 2 A s Input Reflected Ripple Current, peak-to-peak (5Hz to 20MHz, 12μH source impedance; VIN=0V to 75V, IO= IOmax ; All 20 mAp-p see Figure 7) Input Ripple Rejection (120Hz) All 40 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 an integrated part of complex power architecture. To preserve maximum flexibility, internal fusing is not included. Always use an input line fuse, to achieve maximum safety and system protection. The safety agencies require a time-delay or fast-acting fuse with a maximum rating of 25 A in the ungrounded input connection (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. August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 2 Data Sheet GE JRCW450U Orca Series; DC-DC Converter Power Modules 36–75 Vdc Input; 48.0Vdc Output; 450W Output Electrical Specifications (continued) Parameter Device Symbol Min Typ Max Unit Output Voltage Set-point All VO, set 47.0 48 49.0 Vdc (VIN=VIN,nom, IO=IO, max, Tc =25°C) Output Voltage Set-Point Total Tolerance (Over all operating input voltage, resistive load, and temperature All VO 47.0  49.0 Vdc conditions until end of life) Output Regulation Line (VIN=VIN, min to VIN, max) All  0.1 0.2 %Vo,set Load (I =I to I) All  0.1 0.2 %V O O, min O, max o,set Temperature (T = -40ºC to +100ºC) All 0.25 0.5 %V c  o,set Output Ripple and Noise on nominal output (VIN=VIN, nom and IO=IO, min to IO, max) RMS (5Hz to 20MHz bandwidth) All 100 125 mV  rms Peak-to-Peak (5Hz to 20MHz bandwidth) All 300 400 mV  pk-pk 1 External Capacitance (ESR > 10 mΩ) All CO 440 6500 μF Output Power (V =48V to 57.6V) All P 450 W o O,max   Output Current All I 0 9.4 A o dc Output Current Limit Inception (Constant current until Vo1.0V. oMAX; o Isolation Specifications Parameter Symbol Min Typ Max Unit Isolation Capacitance C 15 nF iso   Isolation Resistance R 10 MΩ iso   General Specifications Parameter Device Symbol Min Typ Max Unit Calculated Reliability based upon Telcordia SR-332 Issue 3: 9 FIT 136.3 10 /Hours All Method I Case 3 (IO=80%IO, max, TA=40°C, airflow = 200 lfm, 90% MTBF 7,338,052 Hours confidence) 68 76.4 84 g Weight All 2.40 2.69 2.96 oz. August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 3 Data Sheet GE JRCW450U Orca Series; DC-DC Converter Power Modules 36–75 Vdc Input; 48.0Vdc Output; 450W Output Feature Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See Feature Descriptions for additional information. Parameter Device Symbol Min Typ Max Unit Remote On/Off Signal Interface (V =V to V ; open collector or equivalent, IN IN, min IN, max Signal referenced to VIN- terminal) Negative Logic: device code suffix “1” Logic Low = module On, Logic High = module Off Positive Logic: No device code suffix required Logic Low = module Off, Logic High = module On Logic Low - Remote On/Off Current All I   1.0 mA on/off Logic Low - On/Off Voltage All Von/off 0  0.8 Vdc Logic High Voltage – (Typ = Open Collector) All Von/off 4 5 Vdc Logic High maximum allowable leakage current All I   50 μA on/off Turn-On Delay and Rise Times (Vin=V , I =I , 25C) in,nom O O, max Case 1: T = Time until V = 10% of V from application of V delay O O,set in All Tdelay 100 120 150 ms with Remote On/Off set to ON Case 2: Tdelay = Time until VO = 10% of VO,set from application of Remote On/Off from Off to On with Vin already applied for at All Tdelay 15 20 25 ms least one second. Trise = time for VO to rise from 10% of VO,set to 90% of VO,set. All Trise 40 60 80 Synchronous Rectifier Activation Level and Delay* Minimum IOUT to activate synch rectifier mode IOUT,SYNC 2.4 A Minimum time to activate synch rectifier mode (I > I) T 1 ms OUT OUT,SYNC SYNC Output Voltage Overshoot 3 % VO, set (IO=80% of IO, max, TA=25°C) Output Voltage Adjustment (See Feature Descriptions): Output Voltage Remote-sense Range __ __ All Vsense 2 %Vo,nom (only for No Trim or Trim down application ) Output Voltage Set-point Adjustment Range (trim) All V 28.8 --- 57.6 V trim dc Output Overvoltage Protection (TA=25C) All VO, limit 60  65 Vdc Over Temperature Protection All Tref 108 115 120 °C (See Feature Descriptions, Figure 16) Input Under Voltage Lockout V IN, UVLO Turn-on Threshold All 33 35 36 V dc Turn-off Threshold All 30 32 33 V dc Hysteresis All 2.5 3 3.5 Vdc Input Over voltage Lockout VIN, OVLO Turn-on Threshold All 77 80 82 Vdc Turn-off Threshold All 80 83.5 86 Vdc Hysteresis All 2.5 3 5 V dc * Note: Module has internal circuit that inhibits output synchronous rectifier mode, during module startup, until IOUT> IOUT,SYNC for time> TSYNC. Once output synchronous mode is activated, module remains in synchronous rectifier mode, even if load is reduced to 0A, until module output is turned off using on/off pin or loss of input voltage. August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 4 Data Sheet GE JRCW450U Orca Series; DC-DC Converter Power Modules 36–75 Vdc Input; 48.0Vdc Output; 450W Output Characteristic Curves The following figures provide typical characteristics for the JRCW450U (48V, 9.4A) at 25ºC. The figures are identical for either positive or negative Remote On/Off logic. OUTPUT CURRENT, Io (A) TIME, t (50ms/div) Figure 1. Converter Efficiency versus Output Current. Figure 4. Typical Start-Up Using negative Remote On/Off; Co,ext = 440µF. TIME, t (50ms/div) TIME, t (1s/div) Figure 2. Typical Output Ripple and Noise at Room Figure 5. Typical Start-Up from VIN, on/off enabled prior to Temperature and 48Vin; Io = Io,max; Co,ext = 440µF. VIN step; Co,ext = 470µF. TIME, t (1ms/div) TIME, t (1ms/div) Figure 3. Dynamic Load Change Transient Response from Figure 6. Dynamic Load Change Transient Response from 50 % to 75% to 50% of Full Load at Room Temperature and 48 25% to 50% to 25% of Full Load at Room Temperature and 48 Vin; 0.1A/uS, C = 440µF. Vin; 0.1A/uS, C = 440µF. o,ext o,ext August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 5 OUTPUT CURRENT OUTPUT VOLTAGE OUTPUT VOLTAGE EFFICIENCY (%) I (A) (5A/div) V (V) (500mV/div) VO (V) (100mV/div) O O INPUT VOLTAGE OUTPUT VOLTAGE On/Off VOLTAGE OUTPUTVOLTAGE OUTPUT CURRENT OUTPUT VOLTAGE V (V) (20V/div) V (V) (20V/div) V (V) (5V/div) V (V) (20V/div) in O ON/OFF O I (A) (5A/div) V (V) (500mV/div) O O Data Sheet GE JRCW450U Orca Series; DC-DC Converter Power Modules 36–75 Vdc Input; 48.0Vdc Output; 450W Output configuration in Figure 7, a 470μF Low ESR aluminum Test Configurations capacitor, CIN , mounted close to the power module helps ensure the stability of the unit. Consult the factory for further application guidelines. Output Capacitance The JRCW450U power module requires a minimum output capacitance of 440µF Low ESR aluminum capacitor, C to out ensure stable operation over the full range of load and line conditions, see Figure 8. If the ambient temperature is under - 20C, it is required to use at least 3 pcs of minimum capacitors in parallel. In general, the process of determining the acceptable values of output capacitance and ESR is complex Note: Measure the input reflected-ripple current with a simulated and is load-dependent. source inductance (LTEST) of 12 µH. Capacitor CS offsets possible battery impedance. Measure the current, as shown above. Safety Considerations Figure 7. Input Reflected Ripple Current Test Setup. For safety-agency approval of the system in which the power module is used, the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standard, i.e., UL 60950-1, 2nd Ed., nd CSA No. 60950-1 2 Ed., and VDE0805-1 EN60950-1, 2nd Ed. For end products connected to –48V dc, or –60Vdc nominal DC MAINS (i.e. central office dc battery plant), no further fault testing is required. *Note: -60V dc nominal battery plants are not available in the U.S. or Canada. For all input voltages, other than DC MAINS, where the input Note: Use a Cout (470 µF Low ESR aluminum or tantalum capacitor voltage is less than 60V dc, if the input meets all of the typical), a 0.1 µF ceramic capacitor and a 10 µF ceramic capacitor, requirements for SELV, then: and Scope measurement should be made using a BNC socket.  The output may be considered SELV. Output voltages will Position the load between 51 mm and 76 mm (2 in. and 3 in.) from the remain within SELV limits even with internally-generated module. non-SELV voltages. Single component failure and fault Figure 8. Output Ripple and Noise Test Setup. tests were performed in the power converters. One pole of the input and one pole of the output are to be grounded, or both circuits are to be kept floating, to maintain the output voltage to ground voltage within ELV or SELV limits. However, SELV will not be maintained if V (+) and V (+) are I O grounded simultaneously. For all input sources, other than DC MAINS, where the input voltage is between 60 and 75V dc (Classified as TNV-2 in Europe), the following must be meet, if the converter’s output is to be evaluated for SELV: Note: All measurements are taken at the module terminals. When socketing, place Kelvin connections at module terminals to avoid  The input source is to be provided with reinforced measurement errors due to socket contact resistance. insulation from any hazardous voltage, including the ac mains.  One Vi pin and one Vo pin are to be reliably earthed, or both the input and output pins are to be kept floating. Figure 9. Output Voltage and Efficiency Test Setup.  Another SELV reliability test is conducted on the whole Design Considerations system, as required by the safety agencies, on the combination of supply source and the subject module to Input Source Impedance verify that under a single fault, hazardous voltages do The power module should be connected to a low not appear at the module’s output. ac-impedance source. A highly inductive source impedance can affect the stability of the power module. For the test August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 6 Data Sheet GE JRCW450U Orca Series; DC-DC Converter Power Modules 36–75 Vdc Input; 48.0Vdc Output; 450W Output output voltage is greater than VtrimMIN. If the load resistance is Safety Considerations (continued) too low to support VtrimMIN in an overcurrent condition or a All flammable materials used in the manufacturing of these short circuit load condition exists, the module will shut down modules are rated 94V-0, or tested to the UL60950 A.2 for immediately. reduced thickness. A latching shutdown option is standard. Following shutdown, the module will remain off until the module is reset by either The input to these units is to be provided with a maximum 25 cycling the input power or by toggling the on/off pin for one A fast-acting or time-delay fuse in the ungrounded input second. connection. An auto-restart option (4) is also available in a case where an To ensure safety compliance, the temperatures at Tref1, Tref2, auto recovery is required. If overcurrent greater than 12A or Tref3 should (Figure 16) not exceed the limits as specified in persists for few milli-seconds, the module will shut down and this table for Vin = 36 to 75V. auto restart until the fault condition is corrected. If the output overload condition still exists when the module restarts, it will Tref1 or Tref2 Tref3 shut down again. This operation will continue indefinitely, until o o 90C 130 C the overcurrent condition is corrected. Feature Description Over Voltage Protection Remote On/Off The output overvoltage protection consists of circuitry that monitors the voltage on the output terminals. If the voltage on Two remote on/off options are available. Positive logic turns the output terminals exceeds the over voltage protection the module on during a logic high voltage on the ON/OFF pin, threshold, then the module will shut down and latch off. The and off during a logic low. Negative logic remote On/Off, overvoltage latch is reset by either cycling the input power for device code suffix “1”, turns the module off during a logic high one second or by toggling the on/off signal for one second. and on during a logic low. The protection mechanism is such that the unit can continue To turn the power module on and off, the user must supply a in this condition until the fault is cleared. switch (open collector or equivalent) to control the voltage An auto-restart option (4) is also available in a case where an (V ) between the ON/OFF terminal and the V (-) terminal on/off IN auto recovery is required. (see Figure 10). Logic low is 0V ≤ V ≤ 0.8V. The maximum on/off Remote sense Ion/off during a logic low is 1mA, the switch should be maintain a logic low level whilst sinking this current. Remote sense minimizes the effects of distribution losses by During a logic high, the typical maximum Von/off generated by regulating the voltage at the remote-sense connections (see the module is 5V, and the maximum allowable leakage Figure 11). For No Trim or Trim down application, the voltage current at V = 5V is 50μA. on/off between the remote-sense pins and the output terminals must not exceed the output voltage sense range given in the If not using the remote on/off feature: Feature Specifications table i.e.: For positive logic, leave the ON/OFF pin open. [Vo(+)–Vo(-)] – [SENSE(+) – SENSE(-)]  2% of Vo,nom For negative logic, short the ON/OFF pin to VIN(-). The voltage between the Vo(+) and Vo(-) terminals must not exceed the minimum output overvoltage shut-down value indicated in the Feature Specifications table. This limit includes any increase in voltage due to remote-sense compensation and output voltage set-point adjustment (trim). See Figure 11. If not using the remote-sense feature to regulate the output at the point of load, then connect SENSE(+) to Vo(+) and SENSE(-) to Vo(-) at the module. Although the output voltage can be increased by both the remote sense and by the trim, the maximum increase for the output voltage is not the sum of both. The maximum increase is the larger of either the remote sense or the trim. The amount of power delivered by the module is defined as the Figure 10. Circuit configuration for using Remote On/Off voltage at the output terminals multiplied by the output Implementation. current. When using remote sense and trim: the output voltage of the module can be increased, which at the same Overcurrent Protection output current would increase the power output of the To provide protection in a fault output overload condition, the module. Care should be taken to ensure that the maximum module is equipped with internal current limiting protection output power of the module remains at or below the circuitry, and can endure continuous overcurrent by providing maximum rated power. constant current output, for up to 4 seconds, as long as the August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 7 Data Sheet GE JRCW450U Orca Series; DC-DC Converter Power Modules 36–75 Vdc Input; 48.0Vdc Output; 450W Output Where, Feature Description (continued) Vo, nomVdesired % 100 Vo, nom Vdesired = Desired output voltage set point (V). Figure 11. Effective Circuit Configuration for Single-Module Remote-Sense Operation Output Voltage. Output Voltage Programming Trimming allows the user to increase or decrease the output voltage set point of a module. Trimming down is accomplished by connecting an external resistor between the TRIM pin and the SENSE(-) pin. Trimming up is accomplished by connecting external resistor between the SENSE(+) pin and Figure 13. Circuit Configuration to Decrease Output TRIM pin. The trim resistor should be positioned close to the Voltage. module. Certain restrictions apply to the input voltage lower limit when trimming the output voltage to the maximum. See Figure 12 for the allowed input to output range when using Trim Up – Increase Output Voltage trim. If not using the trim down feature, leave the TRIM pin With an external resistor (Radj_up) connected between the open. SENSE(+) and TRIM pins, the output voltage set point (V ) o,adj increases (see Figure 14). The following equation determines the required external- resistor value to obtain a percentage output voltage change of %. For output voltages: VO,nom = 48V Without –T Option V  (100%)  (100 (2%) O,nom Radj _ up  k   1.225% %   With –T Option 27122   Radj _up 15.12 k   %   Where, Figure 12. Output Voltage Trim Limits vs. Input Voltage. VdesiredVo, nom % 100 Vo, nom Trim Down – Decrease Output Voltage V = Desired output voltage set point (V). desired With an external resistor (R ) between the TRIM and adj_down SENSE(-) pins, the output voltage set point (V ) decreases o,adj (see Figure 13). The following equation determines the required external-resistor value to obtain a percentage output voltage change of %. For output voltages: VO,nom = 48V Without –T Option With –T Option 100   1000  Radj _ down 2 k Radj _ down 11 k     % %     August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 8 Data Sheet GE JRCW450U Orca Series; DC-DC Converter Power Modules 36–75 Vdc Input; 48.0Vdc Output; 450W Output Active Voltage Programming Feature Description (continued) For the JRCW450Ux a Digital-Analog converter (DAC), capable of both sourcing and sinking current can be used to actively set the output voltage, as shown in Figure 15. The value of R G will be dependent on the voltage step and range of the DAC and the desired values for trim-up and trim-down ∆%. Please contact your GE technical representative to obtain more details on the selection for this resistor. Figure 14. Circuit Configuration to Increase Output Voltage. The voltage between the Vo(+) and Vo(-) terminals must not exceed the minimum output overvoltage shut- down value indicated in the Feature Specifications table. This limit includes any increase in voltage due to remote- sense compensation and output voltage set-point adjustment (trim). See Figure 11. Although the output voltage can be increased by both the remote sense and by the trim, the maximum increase for the Figure 15. Circuit Configuration to Actively Adjust the output voltage is not the sum of both. Output Voltage. The maximum increase is the larger of either the remote sense or the trim. Over Temperature Protection The amount of power delivered by the module is defined as the voltage at the output terminals multiplied by the output The JRCW450U module provides a non-latching over current. When using remote sense and trim, the output temperature protection. A temperature sensor monitors the voltage of the module can be increased, which the same operating temperature of the converter. If the reference output current would increase the power output of the temperature, T , (see Figure 16) exceeds a threshold of 115 REF 1 module. Care should be taken to ensure that the maximum ºC (typical), the converter will shut down and disable the output power of the module remains at or below the output. When the base plate temperature has decreased by maximum rated power. approximately 1-2 ºC the converter will automatically restart. Examples: Tunable Loop To trim down the output of a nominal 48V module, without –T The JRCW0450U-T modules have a new feature that option, to 40V optimizes transient response of the module called Tunable Loop. 48V40V % 100 48V External capacitors are usually added to the output of the %16.7% module for two reasons: to reduce output ripple and noise and to reduce output voltage deviations from the steady- 100   Radj _ down 2 k   state value in the presence of dynamic load current changes. 16.7   Adding external capacitance however affects the voltage Radj _ down 4.0k control loop of the module, typically causing the loop to slow down with sluggish response. Larger values of external capacitance could also cause the module to become To trim up the output of a nominal 48V module, without –T unstable. option, to 52.8V The Tunable Loop allows the user to externally adjust the 52.8V48V % 100 voltage control loop to match the filter network connected to 48V the output of the module. The Tunable Loop is implemented %10% by connecting a series R-C between the SENSE(+) and TRIM 48(10010) (100(210)) pins of the module, as shown in Fig. 16. This R-C allows the R   k adj _up   user to externally adjust the voltage loop feedback 1.22510 10   compensation of the module. R  419.0k adj _up August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 9 Data Sheet GE JRCW450U Orca Series; DC-DC Converter Power Modules 36–75 Vdc Input; 48.0Vdc Output; 450W Output temperature. For a given airflow and ambient temperature, the module output power is increased, until one (or more) of the components reaches its maximum derated operating temperature, as defined in IPC-9592. This procedure is then repeated for a different airflow or ambient temperature until a family of module output derating curves is obtained. Figure 16. Circuit diagram showing connection of RTUNE and CTUNE to tune the control loop of the module. Table 1 shows the recommended values of R and C for TUNE TUNE different values of ceramic output capacitors up to 8000µF that might be needed for an application to meet output ripple and noise requirements. Table 1. General recommended values of of RTUNE and CTUNE for Vout=48V and various external ceramic capacitor combinations. Cout(µF) 1100 2200 4400 6600 8800 ESR (mΩ) 60 30 15 10 7.5 For reliable operation with Vin=48V this temperature should RTUNE TBD TBD TBD TBD TBD no texceed 100ºC at either T or T , or 130 ºC at T for REF 1 REF 2 REF3 C TUNE TBD TBD TBD TBD TBD applications using forced convection airflow without heat sink, or in cold plate applications. The temperatures at either TREF 1 or TREF 2 should not exceed 90ºC, when using a 1in. heat Please contact your GE technical representative to obtain sink in forced convection airflow. The output power of the more details of this feature as well as for guidelines on how to module should not exceed the rated power for the module as select the right value of external R-C to tune the module for listed in the ordering Information table. Although the best transient performance and stable operation for other maximum T temperature of the power modules is REF output capacitance values. discussed above, you can limit this temperature to a lower value for extremely high reliability. Thermal Considerations The power modules operate in a variety of thermal environments; however, sufficient cooling should be provided to help ensure reliable operation of the unit. Heat-dissipating components inside the unit are thermally coupled to the case. Heat is removed by conduction, convection, and radiation to the surrounding environment. Proper cooling can be verified by measuring the case temperature. Peak temperature (TREF) occurs at the position indicated in Figure 16. 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. Figure 16. Case (T ) Temperature Measurement Location REF The thermal data presented here is based on physical (top view). measurements taken in a wind tunnel, using automated thermo-couple instrumentation to monitor key component temperatures: FETs, diodes, control ICs, magnetic cores, ceramic capacitors, opto-isolators, and module pwb conductors, while controlling the ambient airflow rate and August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 10 Data Sheet GE JRCW450U Orca Series; DC-DC Converter Power Modules 36–75 Vdc Input; 48.0Vdc Output; 450W Output Thermal Considerations (continued) Thermal Derating Thermal derating is presented for different applications in Figure 17, 18 and 19. The JRCW450U module is mounted in a traditional open chassis or cards with forced air flow. The module is cooled by heat removal into a forced airflow that passes through the interior of the module and over the top base plate and/or attached heat sink. Conduction cooled thermal derating is presented in Figure 20. o Ambient Temperature, T ( C) A Figure 19. Derating Output Current vs. local Ambient temperature and Airflow, 1.0” Heat sink, Vin=48V, airflow from Vi(-) to Vi(+). o Ambient Temperature, T ( C) A Figure 17. Derating Output Current vs. local Ambient temperature and Airflow, No Heat sink, Vin=48V, airflow from Vi(-) to Vi(+). o Cold Plate (inside surface) Temperature, TC ( C) Figure 20. Derating Output Power in conduction cooling (cold plate) applications, Vin=48V. o Ambient Temperature, TA ( C) Figure 18. Derating Output Current vs. local Ambient temperature and Airflow, 0.5” Heat sink, Vin=48V, airflow from Vi(-) to Vi(+). August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 11 Output Current, IO (A) Output Current, IO (A) Output Power, P (W) O Output Current, IO (A) Data Sheet GE JRCW450U Orca Series; DC-DC Converter Power Modules 36–75 Vdc Input; 48.0Vdc Output; 450W Output Layout Considerations Through-Hole Lead-Free Soldering The JRCW450U power module series are constructed using a Information single PWB with integral base plate; as such, component The RoHS-compliant through-hole products use the SAC clearance between the bottom of the power module and the (Sn/Ag/Cu) Pb-free solder and RoHS-compliant components. mounting (Host) board is limited. Avoid placing copper areas They are designed to be processed through single or dual on the outer layer directly underneath the power module. wave soldering machines. The pins have a RoHS-compliant Post Solder Cleaning and Drying finish that is compatible with both Pb and Pb-free wave soldering processes. A maximum preheat rate of 3C/s is Considerations suggested. The wave preheat process should be such that Post solder cleaning is usually the final circuit-board assembly the temperature of the power module board is kept below process prior to electrical board testing. The result of 210C. For Pb solder, the recommended pot temperature is inadequate cleaning and drying can affect both the reliability 260C, while the Pb-free solder pot is 270C max. The of a power module and the testability of the finished JRCW450U cannot be processed with paste-through-hole Pb circuit-board assembly. For guidance on appropriate or Pb-free reflow process. If additional information is needed, soldering, cleaning and drying procedures, refer to GE Board please consult with your GE representative for more details. Mounted Power Modules: Soldering and Cleaning Application Note. August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 12 Data Sheet GE JRCW450U Orca Series; DC-DC Converter Power Modules 36–75 Vdc Input; 48.0Vdc Output; 450W Output Mechanical Outline for Through-Hole Module 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 side label includes GE name, product designation, and data code. TOP VIEW* SIDE VIEW** BOTTOM VIEW Pin Description 1 Vin (+) 2 On/Off 3 Baseplate 4 Vin (–) 5 Vout (–) 6 Sense (-) 7 Trim 8 Sense (+) 9 Vout (+) August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 13 Data Sheet GE JRCW450U Orca Series; DC-DC Converter Power Modules 36–75 Vdc Input; 48.0Vdc Output; 450W Output Recommended Pad Layout for Through Hole Module 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. ] August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 14 Data Sheet GE JRCW450U Orca Series; DC-DC Converter Power Modules 36–75 Vdc Input; 48.0Vdc Output; 450W Output Ordering Information Please contact your GE Sales Representative for pricing, availability and optional features. Table 2. Device Code Output Output Connector Input Voltage Efficiency Product codes Comcodes Voltage Current Type 48V (36-75Vdc) 48V 9.4A 94% Through hole JRCW450U641Z CC109168992 48V (36-75Vdc) 48V 9.4A 94% Through hole JRCW450U64-18Z 150022105 48V (36-75Vdc) 48V 9.4A 94% Through hole JRCW450U64-35Z 150034270 48V (36-75Vdc) 48V 9.4A 94% Through hole JRCW450U641-18Z 150021936 48V (36-75Vdc) 48V 9.4A 94% Through hole JRCW450U641-TZ CC109168984 48V (36-75Vdc) 48V 9.4A 94% Through hole JRCW450U64-18TZ CC109172838 Table 3. Device Options Contact Us For more information, call us at USA/Canada: +1 888 546 3243, or +1 972 244 9288 Asia-Pacific: +86.021.54279977*808 Europe, Middle-East and Africa: +49.89.878067-280 India: +91.80.28411633 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. August 31, 2014 ©2012 General Electric Company. All International rights reserved. Version 1.27