sentido ( Data Sheet July 1996 microelectronics group Lucent Technologies Bell Labs Innovations JW050H, JW075H, JW100H, JW150H Power Modules: dc-dc Converters; 36 Vdc to 75 Vdc Input; 50 W to 150 W The JWO50H, JW075H, JW100H, and JW150H Power Modules use advanced surface-mount technology and deliver high- quality, efficient, and compact dc-dc conversion. Features Small size: 2.40 in. x 2.28 in. x 0.50 in. High power density High efficiency: 89% typical Low output noise Constant frequency Industry-standard pinout Metal baseplate 2:1 input voltage range Overtemperature protection (100 W and 150 W only) Remote sense Remote on/off Adjustable output voltage: 60% to 110% of Vo, nom Case ground pin UL" recognized; CSAt and VDE certified CE mark meets 73/23/EEC and 93/68/EEC directives Applications a Distributed power architectures a Workstations a EDP equipment a Telecommunications Options w Choice of on/off configuration = Heat sink available for extended operation a Nonthreaded-through mounting holes Description The JWO50H, JW075H, JW100H, and JW150H Power Modules are dc-dc converters that operate over an input voltage range of 36 Vdc to 75 Vdc and provide precisely regulated dc outputs. The outputs are fully isolated from the inputs, allowing versatile polarity configurations and grounding connections. The modules have maximum power ratings from 50 W to150 W at a typical full-load efficiency of 89%. The sealed modules offer a metal baseplate for excel- lent thermal performance. Threaded-through holes are provided to allow easy mounting or addition of a heat sink for high-temperature applications. The standard feature set includes remote sensing, output trim, and remote on/off for convenient flexibility in distributed power applications. * ULis a registerd trademark of Underwriters Laboratories. t+ CSA is a registered trademark of Canadian Standards Associa- tion. +This product is intended for integration into end-use equipment. All the required procedures for CE marking of end-use equipment should be followed. (The CE mark is placed on selected products.)JWO50H, JW075H, JW100H, JW150H Power Modules: dc-dc Converters; 36 Vdc to 75 Vdc Input; 50 W to 150 W Data Sheet July 1996 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 device reliability. Parameter Symbol Min Max Unit Input Voltage Vi _ 80 Vv /O Isolation Voltage _ _ 1500 Vdc Operating Case Temperature Tc 40 100 C (See Thermal Considerations section.) Storage Temperature Tstg 40 110 C Electrical Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, temperature conditions, and on/off configuration. Table 1. Input Specifications Parameter Symbol Min Typ Max Unit Operating Input Voitage Vi 36 48 75 Vde Maximum Input Current (Vi = 0 V to 75 V; lo = lo, max): JWO050H I, max 2.5 A JW075H hh, max _ _ 3.5 A JW100H lh, max _ _ 4.0 A JW150H li, max _ _ 6.5 A Inrush Transient i*t 1.0 As Input Reflected-ripple Current, Peak-to-Peak _ _ 5 mA p-p (5 Hz to 20 MHz, 12 WH source impedance; see Figure 14.) Input Ripple Rejection (120 Hz) 60 dB Fusing Considerations CAUTION: This power module is not internally fused. An input line fuse must always be used. This encapsulated power module can be used in a wide variety of applications, ranging from simple stand-alone operation to an integrated part of a sophisticated power architecture. To preserve maximum flexibilty, internal fusing is not included; however, to achieve maximum safety and system protection, always use an input line fuse. The Safety Agencies require a normal-blow, dc fuse. A dc fuse with a maximum rating of 20 A is recommended. 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 manufacturers data for further information. 2 Lucent Technologies Inc.Data Sheet JWO050H, JW075H, JW100H, JW150H Power Modules: July 1996 dc-dc Converters; 36 Vdc to 75 Vdc Input; 50 W to 150 W Electrical Specifications (continued) Table 2. Output Specifications Parameter Device | Symbol Min Typ Max Unit Output Voltage All Vo 23.28 _ 24.72 Vde (Over all operating input voltage, resistive load, and temperature conditions until end of life; see Figure 16.) Output Voltage Set Point All Vo, set 23.55 24.0 24.45 Vde (Vi = 48 V; lo = lo, max; Tc = 25 C): Output Regulation: Line (Vi = 36 V to 75 V) All _ 0.01 0.1 % Load (lo = lo, min to lo, max) All _ _ 0.05 0.2 % Temperature (Tc = 40 C to +100 C) All _ 100 300 mV Output Ripple and Noise Voltage (See Figure 15.): All _ _ 150 mVrms RMS All _ _ _ 400 mVp-p Peak-to-Peak (5 Hz to 20 MHz) Output Current: JW050H lo 0.3 2.1 A (At lo, min, the output ripple may exceed limits.) | JW0O75H lo 0.3 3.1 A JW100H lo 0.3 _ 4.2 A JW150H lo 0.3 _ 6.2 A Output Current-limit Inception (Vo = 90% of JW050H lo 2.2 2.4 2.7 A Vo, nom; see Figures 58.) JW075H lo 3.3 3.6 4.0 A JW100H lo 4.4 4.8 5.5 A JW150H lo 6.6 7.3 8.1 A Output Short-circuit Current All % lo, max _ 170 % (Vo = 250 mV) Efficiency (Vi = 48 V; lo = lo, max; Tc = 70 C; see | JWO50H nN 84.5 86.5 % Figures 912 and 16.) JW075H n 86.5 88.5 _ % JW100H n 87.5 89.5 _ % JW150H n 87.5 89.5 % Dynamic Response (Alo/At = 1 A/10 ys, Vi = 48 V, Tc = 25 C): Load Change from lo = 50% to 75% of lo, max Peak Deviation All _ _ 3 _ %VO, set Settling Time (Vo < 10% of peak deviation) All _ 0.3 _ ms Load Change from lo = 50% to 25% of lo, max Peak Deviation All _ _ 3 %Vo, set Settling Time (Vo < 10% of peak deviation) All 0.3 ms Lucent Technologies Inc. 3JWO50H, JW075H, JW100H, JW150H Power Modules: Data Sheet dc-dc Converters; 36 Vdc to 75 Vdc Input; 50 W to 150 W July 1996 Electrical Specifications (continued) Table 3. Isolation Specifications Parameter Min Typ Max Unit Isolation Capacitance 2500 pF Isolation Resistance 10 _ MQ General Specifications Parameter Min | Typ | Max Unit Calculated MTBF (lo = 80% of lo, max; Tc = 40 C) 3,000,000 hr Weight | | 35(100) | oz. (g) Feature Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See Feature Descriptions and Design Considerations for further information. Parameter Symboi | Min Typ Max Unit Remote On/Off (Vi = 36 V to 75 V; open collector or equivalent compatible; signal referenced to Vi() terminal; see Figure 22 and Fea- ture Descriptions.): JWxxxH1 Negative Logic Logic Low Module On Logic High Module Off JWxxxH Positive Logic Logic Low Module Off Logic High Module On Module Specifications: On/Off Current - Logic Low lorvott _ _ 1.0 mA On/Off Voltage: Logic Low Vonott 0 _ 1.2 V Logic High (loot = 0) Vorott _ _ 15 V Turn-on Time _ _ 20 _ ms (lo = 80% of lo, max; Vo within +1% of steady state) Output Voltage Sense Range _ 0.5 Vv Output Voltage Set Point Adjustment Range _ 60 _ 110 %Vo, nom Output Overvoltage Clamp _ 26.5 _ 33.0 Vde Overtemperature Shutdown (auto restart) 100 W and 150 W Units Only Tc _ 105 _ C 4 Lucent Technologies Inc.Data Sheet JWO50H, JWO075H, JW100H, JW150H Power Modules: July 1996 dc-dc Converters; 36 Vdc to 75 Vdc Input; 50 W to 150 W Characteristics Curves The following figures provide typical characterisitics for the JWO50H, JW075H, JW100H, and JW150H power mod- ules. The figures are identical for both on/off configurations. 4.0 z g - 5 5 ai WW a a S g 3 P 5 hf @ Z Z OSb-i-fte dtd tp pe bt bt Pa bid PERT EEE Ea EEG cobb Gi 0.0 Lt pf i i ft 0 4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 646872 0 4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 64 6872 INPUT VOLTAGE, Vi (V) INPUT VOLTAGE, Vi (V) 8-1160(C) 8-1159(C) Figure 3. Typical JW100H Input Characteristics at Figure 1. Typical JWO50H Input Characteristics at Room Temperature, lo = 4.2 A Room Temperature, lo = 2,1 A INPUT CURRENT, I! (A) INPUT CURRENT, I (A) INPUT VOLTAGE, V1 (V) B-1142(C) INPUT VOLTAGE, Vi (V) 8-1131(C} Figure 4. Typical JW150H Input Characteristics at Figure 2. Typical JW075H Input Characteristics at Room Temperature, lo = 6.2 A Room Temperature, lo = 3.1 A Lucent Technologies Inc. 5JW050H, JW075H, JW100H, JW150H Power Modules: Data Sheet de-de Converters; 36 Vdc to 75 Vdc Input; 50 W to 150 W July 1996 Characteristic Curves (continued) Qt 6 0oer_ tint 22 20 18 16 14 12 10 25 20 15 Vout (V) Vout (V} 10 ON AOD 0 poe 0.005 1.0 15 2.0 25 3.0 35 4.0 4.5 5.0 55 6.065 00 05 10 15 20 25 30 35 40 45 _ OUTPUT CURRENT, Io (A) OUTPUT CURRENT, lo (A) B-1288(C) avec) = Figure 7. Typical JW100H Output Characteristics Figure 5. Typical JWO50H Output Characteristics at Room Temperature, Vin = 48 V at Room Temperature, Vin = 48 V Vout (V) OUTPUT CURRENT, lo (A) OUTPUT CURRENT, Io (A) 8-1289(C) size7ic) ~s Figure 8. Typical JW150H Output Characteristics Figure 6. Typical JW075H Output Characteristics at Room Temperature, Vin = 48 V ~ at Room Temperature, Vin = 48 V 6 Lucent Technologies Inc.Data Sheet JW050H, JW075H, JW100H, JW150H Power Modules: July 1996 dc-de Converters; 36 Vdc to 75 Vdc Input; 50 W to 150 W Characteristic Curves (continued) EFFICIENCY, n (%) OUTPUT CURRENT, lo (A) 8-1290{C).a Figure 9. Typical JWO50H Converter Efficiency vs. Output Current at Room Temperature EFFICIENCY, n (%) 0.8 1.2 1.6 2.0 2.4 2.8 3.2 OUTPUT CURRENT, lo (A) 8-1291(C) Figure 10. Typical JW075H Converter Efficiency vs. Output Current at Room Temperature Lucent Technologies Inc. 90 89 87 85 83 81 EFFICIENCY, n (%) 79 77 75 00 04 08 12 16 20 24 28 3.2 364042 Figure 1 OUTPUT CURRENT, lo (A) 8-1292(C) 1. Typical JW100H Converter Efficiency vs. Output Current at Room Temperature EFFICIENCY, n (%) OUTPUT CURRENT, lo (A) 8-1293(C) Figure 12. Typical JW150H Converter Efficiency vs. Output Current at Room TemperatureJWO0O50H, JW075H, JW100H, JW150H Power Modules: Data Sheet dc-dc Converters; 36 Vdc to 75 Vdc Input; 50 W to 150 W July 1996 Characteristic Curves (continued) COPPER STRIP Le t vo(+) | @ slo uw setcecbestcecbeceeecbeneeeetioeres Pes eeecbo ee co ebeneeeebe sees beecees 385 z your tour RESISTIVE 688 0 RRP ben te Berner <1 OuF = 10uF SCOPE = i Gap eee werd fs vo-) | o| $ go CO ov} eb + HEU EHLERS Ee 8-749(C) ++ wee dade ee te ae ee en dee ee ge ened e t4-t we nee be ee age nape teehee eg cree nbn eeepc ee +t-t ee er dee Pew ee de enn ge ne dee eee de ene dee eee +hi-t OV OUTPUT VOLTAGE, Vo (V) (10 Vidiv) + + TIME, t (5 ms/div) 8-1266(C) Figure 13. Typical Start-Up from Remote On/Off JWxxxH; lo = Full Load Test Configurations TO OSCILLOSCOPE LTEST 12 pH @ 20 C, 100 kHz : @ Vi-) | Cs 220 pF 33 uF BATTERY = | IMPEDANCE <0.1Q > I 8-203(C) Note: Measure input reflected-ripple current with a simulated source impedance (Lrest) of 12 wH. Capacitor Cs offsets possible battery impedance. Measure current as shown above. Figure 14. Input Reflected-Ripple Test Setup Note: Use a 1.0 pF ceramic capacitor. Scope measurement should be made using a BNC socket. Position the load between 2 in. and 3 in. from the module. Figure 15. Peak-to-Peak Ouput Noise Measure- ment Test Setup SENSE (+) CONTACT AND DISTRIBUTION LOSSES }@ Vi(+) Va(+) lo = SUPPLY LOAD Le Vi(-) Vo(-) CONTACT [| RESISTANCE SENSE (-) 8-749(C) Note: All measurements are taken at the module terminals. When socketing, place Kelvin connections at module terminals to avoid measurement errors due to socket contact resistance. _ ({Vol+)-(Vol-))}Io n= ( [Vi(+) = (Vi) x 100 Figure 16. Output Voltage and Efficiency Measurement Test Setup Lucent Technologies Inc.Data Sheet July 1996 JWO050H, JW075H, JW100H, JW150H Power Modules: dc-dc Converters; 36 Vdc to 75 Vdc Input; 50 W to 150 W Design Considerations Input Source Impedance The power module should be connected to a low ac-impedance input source. Highly inductive source impedances can affect the stability of the power module. For the test configuration in Figure 14, a 33 uF electrolytic capacitor (ESR < 0.7 Q at 100 kHz) mounted close to the power module helps ensure stability of the unit. For other highly inductive source impedances, consult the factory for further application guidelines. Safety Considerations 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-1950, CSA 22.2-950, EN60950. In addition, the positive input of the power module must not be connected to the modules positive output. The inputs to these power units are to be provided with a maximum 20 A normal blow fuse in the ungrounded lead. For the converter output to be considered meeting the requirements of safety extra low voltage (SELV), one of the following must be true of the dc input: s All inputs are SELV and floating, with the output also floating. a All inputs are SELV and grounded, with the output also grounded. a Any non-SELV input must be provided with rein- forced insulation from any other hazardous voltages, including the ac mains, and must have an SELV reli- ability test performed on it in combination with the converters. The power module has extra low voltage (ELV) outputs when all inputs are ELV. Lucent Technologies Inc. Feature Descriptions Remote Sense Remote sense minimizes the effects of distribution losses by regulating the voltage at the remote-sense connections. The voltage between the remote-sense pins and the output terminals must not exceed the out- put voltage sense range given in the Feature Specifica- tions table, i.e.: [Vo(+) - Vo(-)] - [SENSE(+) - SENSE(-)] < 0.5 The voltage between the Vo(+) and Vo() terminals must not exceed 26.4 V. This limit includes any increase in voltage due to remote sense compensation, set point adjustment, and trim (see Figure 17). SENSE(+)e- SENSE(-)e now pe Vi(+) Vo(-) Wr AW = _ I = SUPPLY Ff ae LOADS fe Vi(-) Vo(+) e WW AN CONTACT CONTACT AND RESISTANCE DISTRIBUTION LOSSES 8-651.a(C) Figure 17. Effective Circuit Configuration for Single-Module Remote Sense Operation Output Voltage Trim Output voltage trim allows the user to increase or decrease the output voltage set point of a module. This is accomplished by connecting an external resistor between the TRIM pin and either the SENSE(+) or SENSE(-) pins. With an external resistor between the TRIM and SENSE(-) pins (Radj-down), the output voltage set point (Vo, adj) decreases (see Figure 18). The follow- ing equation determines the required external-resistor value to obtain a percentage output voltage change of A%. (100 _ Resi down = (40 2) kQJWO050H, JW075H, JW100H, JW150H Power Modules: dc-dc Converters; 36 Vdc to 75 Vdc Input; 50 W to 150 W Data Sheet July 1996 Feature Descriptions (continued) Output Voltage Trim (continued) With an external resistor connected between the TRIM and SENSE(+) pins (Ragj-up), the output voltage set point (Vo, adj) increases (see Figure 19). The following equation determines the required exter- nal-resistor value to obtain a percentage output voltage change of A%. Vo(100+A%) (100 +2A%) 1.225A% A% Radj -up -( } kQ The combination of the output voltage adjustment and sense range and the output voltage given in the Fea- ture Specifications table cannot exceed 110% of the nominal output voltage between the Vo(+) and Vo(-) terminals. o Vi(+) Vo(+) o ON/OFF SENSE(+) * CASE TRIM 3 3 Row @Rad-down * Vi(-) SENSE(-) Vol-) Figure 18, Circuit Configuration to Decrease Output Voltage o Vi(+) Vo(+) o o ON/OFF SENSE(+) o : Radj-up $ o CASE TRIM & $ Rioap o Vi{-) SENSE(-) o Vo(-) o 8-718(C).b Figure 19. Circuit Configuration to Increase Output Voltage 10 Remote On/Off Two remote on/off options are available. Positive logic remote on/off turns the module on during a logic high voltage on the remote on/off pin, and off during a logic low. Negative logic remote on/off turns the module off during a logic high and on during a logic low. Negative logic (code suffix of 1) is the factory-preferred configu- ration. To turn the power module on and off, the user must supply a switch to control the voltage between the on/ off terminal and the Vi(-) terminal (Vorott). The switch can be an open collector or equivalent (see Figure 20). A logic low is Vowott = 0 V to 1.2 V. The maximum lon/ott during a logic low is 1 mA. The switch should maintain a logic low voltage while sinking 1 mA. During a logic high, the maximum Voor generated by the power module is 15 V. The maximum allowable leakage current of the switch at Vorot = 15 V is 50 pA. LL thew -e Vi(-) - SENSE(+) @ bf Von/ott Vv + ott) @ REMOTE Vo-) 3 LOAD Le ONOEF e lonvoit SENSE(-) @ GRD OUT - 8-720{C) Figure 20. Remote On/Off Implementation Current Limit To provide protection in a fault (output overload) condi- tion, the unit is equipped with internal current-limiting circuitry and can endure current-limiting for an unlimited duration. At the point of current-limit inception, the unit shifts from voltage control to current control. If the out- put voltage is pulled very low during a severe fault, the current-limit circuit can exhibit either foldback or tailout characteristics (output current decrease or increase). The unit operates normally once the output current is brought back into its specified range. Lucent Technologies Inc.Data Sheet July 1996 JWO050H, JW075H, JW100H, JW150H Power Modules: dc-dc Converters; 36 Vdc to 75 Vdc Input; 50 W to 150 W Feature Descriptions (continued) Output Overvoltage Clamp The output overvoltage clamp consists of control circuitry, independent of the primary regulation loop, that monitors the voltage on the output terminals. The control loop of the clamp has a higher voltage set point than the primary loop (see Feature Specifications table). This provides a redundant voltage contro! that reduces the risk of output overvoitage. Thermal Considerations Introduction The JWO50H, JWO075H, JW100H, and JW150H 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 (Tc) occurs at the position indicated in Figure 21. MEASURE CASE 1 50 (38.0) >| funn HERE 0.3 (7.6) y O [-O0$__ evi +) Vo(4} @ON/OFF (+)SEN @ TAM @CASE (SEN @ evi Vol-} @ eg 8-716.a(C) Figure 21. Case Temperature Measurement Location Note that the view in Figure 21 is of the metal surface of the module; the pin locations shown are for refer- ence. The temperature at this location should not exceed 100 C. The output power of the module should not exceed the rated power for the module as listed in the Ordering Information table. Lucent Technologies Inc. For further information on these modules, refer to the Lucent Technologies Thermal Management for JC-JW Series 50 W50 W Board-Mounted Power Modules Technical Note, TN96-O09EPS. Heat Transfer Without Heat Sinks Increasing airflow over the module enhances the heat transfer via convection. Figure 22 shows the maximum power that can be dissipated by the module without exceeding the maximum case temperature versus local ambient temperature (Ta) for natural convection through 800 ft./min. Note that the natural convection condition was mea- sured at 10 ft./min. to 20 ft./min.; however, systems in which these power modules may be used typically gen- erate natural convection airflow rates of 60 ft./min. due to other heat dissipating components in the system. Use of Figure 22 is shown in the following example. Example What is the minimum airflow necessary for a JW100H operating at nominal line, an output current of 4.2 A, and a maximum ambient temperature of 40 C? Solution: Given: Vi = 54 V, lo = 4.2 A, Ta = 40 C Determine Po (Figure 25): Po = 12 W Determine Airflow (Figure 22): v = 200 ft./min. 35 T y T y + 800 ft/min. (4.0 m/s) y~ 700 ft/min. (3.5 ms) y 600 ft/min. (3.0 ms) + 500 ft/min. (2.5 m/s) v7 400 ft/min. (2.0 m/s) 1 300 ft/min. (1.5 mvs) +- 200 ft/min. (1.0 m/s) 30 26 20 15 eet el 10 , ~~. . POWER DISSIPATION, Pp (W) 20 ft/min (NAT. CONV.) (0.1 rvs) | 0 10 20 30 40 50 60 70 80 90 100 LOCAL AMBIENT TEMPERATURE, Ta (C) 8-1150(C) Figure 22. Convection Derating Power Derating with No Heat Sink; Either Orientation 11JWO050H, JW075H, JW100H, JW150H Power Modules: Data Sheet dc-dc Converters; 36 Vdc to 75 Vdc Input; 50 W to 150 W July 1996 Thermal Considerations (continued) = > = = w = oe wo nn POWER DISSIPATION, Po (W) OnA NWA AN L 00 04 08 12 16 20 24 28 32 36 4.042 POWER DISSIPATION, Po (W) ett AMD SN OM OD OUTPUT CURRENT, lo (A) OUTPUT CURRENT, 10 (A) 8-1297(C) 8-1295(C) Figure 25. JW100H Power Dissipation vs. Output Figure 23. JWO50H Power Dissipation vs. Output Current Current 25 14 = = s Bah 6 < s 2 2 a a : d g . f 3 : Oo : 0 | { { { { 0 N i i i i 0 1 2 3 4 5 6 0.0 0.5 1.0 1.5 2.0 25 3.0 OUTPUT CURRENT, Io (A) OUTPUT CURRENT, Io (A) -1298(C) 8-1296(C) Figure 26. JW150H Power Dissipation vs. Output Figure 24. JW075H Power Dissipation vs. Output Current Current 12 Lucent Technologies Inc.Data Sheet July 1996 JWO050H, JW075H, JW100H, JW150H Power Modules: dc-dc Converters; 36 Vdc to 75 Vdc Input; 50 W to 150 W Thermal Considerations (continued) Heat Transfer With Heat Sinks The JW Series 50 W150 W modules include through- threaded M3x0.5 mounting holes, which allow heat sinks or cold plates to be attached from either side of the module. The mounting torque must not exceed 5 in-lb (0.56 N-m). Thermal derating with heat sinks is expressed through use of the overall thermal resistance of the module. Total module thermal resistance (8ca) is defined as the maximum case temperature rise (ATc,max) divided by the module power dissipation (Pp): 6ca = ATc,max/Pp = (Tc Ta)/Po The location of the case temperature (Tc) is defined in Figure 21. The case-to-ambient thermal resistance vs. airflow for various heat sink configurations is given in Figure 27. This set of curves was obtained by experi- mental testing of heat sinks, which are offered in the product catalog. These measured resistances are from heat transfer from the sides and bottom of the module as well as the top side with the attached heat sink; therefore, the case-to-ambient thermal resistances shown is generally lower than the resistance of the heat sink by itself. The module used to collect the data in Figure 27 had a thermally conductive dry pad between the case and the heat sink to minimize contact resistance. Use of Figure 27 is shown in the following example. 11/2in. HEAT SINK _...| 1 in. HEAT SINK 1/2 in. HEAT SINK ----4 1/4 in. HEAT SINK NOHEATSINK =" Oe ee CASE-TO-AMBIENT THERMAL RESISTANCE, Rca (C/W) 0 100 200 300 400 500 600 (0.5) (1.0) (1.5) (2.0) (2.5) (3.0) AIR VELOCITY MEASURED IN ft/min. (rV/s) 8-1189(C) Figure 27. Case-to-Ambient Thermal Resistance Curves; Either Orientation Lucent Technologies Inc. Example Although the maximum case temperature for the JW- Series 50 W150 W BMPMs is 100 C, one may want to limit the maximum case temperature to a lower value for extremely high reliability. If an 85 C case tempera- ture is desired, what is the allowable minimum airflow necessary for a JW100H operating at nominal line and an output current of 4.2 A with a maximum ambient of 40 C and a 1/2 in. heat sink? Solution: Given: Vi = 54 V, lo = 20 A, Ta = 40 C, Heat Sink = 1/2 in. Determine Po (Figure 27): Po = 12 W 6ca = (Tc Ta)/Po = (85 40)/12 = 3.75 C/W Use Figure 27 to determine air velocity: 1/2 in. heat sink: v = 125 ft./min. Custom Heat Sinks A more detailed model can be used to determine the required thermal resistance of a heat sink to provide necessary cooling. The total module resistance can be separated into a resistance from case-to-sink (8cs) and sink-to-sink ambient (@sa). This model is shown below: Te Ts Ta Po &_ Wa eh _|@ vn Ocs Osa For a managed interface using thermal grease or foils, a value of 6cs = 0.10.3 C/W is typical. Solution for the heat sink resistance is: 6sa = [ (Tc Ta)/Po ] 8cs Note that this equation assumes that all dissipated power must be shed by the heat sink. Depending on the user-defined application environment, a more accu- rate model including heat transfer from the sides and bottom of the module can be used. This equation pro- vides a conservative estimate in such instances. 13JWO050H, JW075H, JW100H, JW150H Power Modules: Data Sheet dc-dc Converters; 36 Vdc to 75 Vdc Input; 50 W to 150 W July 1996 Outline Diagram Dimensions are in inches and (millimeters). Copper paths must not be routed beneath the power module standoffs. Tolerances: x.xx + 0.02 in. (0.5 mm), x.xxx + 0.010 in. (0.25 mm). Top View 2.28 (57.9) MAX > Qo 2.40 (61.0) MAX Oo a _/ Side View 0.500 (12.70) | 0.081 (2.06) DIA } 0.20(5.1)MIN_|L,- 0.040 (1.02) DIA [a SOLDER PLATED BRASS 7 SOLDER-PLATED 2 PLCS (-OUTPUT AND BRASS 7 PLCS +OUTPUT) Bottom View MOUNTING INSERTS t 0.50 (12.7) M3 x 0.5 THROUGH, 4 PLCS J OR CLEAR-THROUGH HOLE, 0.20 (5.1) to O XX.X DIAMETER, 4 PLCS 0.400 eS (10.16) 5 (10.16) 0.700, 2.00 1.000 Fl CASE = FNSE F (17.78 1.000 (50.8) | (25.40) TRIM o1 t (2540) 1.400 (35.56) GOFF +SENSE (35.56) Ho +INPUT +OUTPUT o 1.900 6 (48.26) 0 \. _/ 0.19 (4.8) _,| }-- 1 90 (48.3) 8-1180(C) 14 Lucent Technologies Inc.Data Sheet JWO050H, JW075H, JW100H, JW150H Power Modules: July 1996 dc-dc Converters; 36 Vdc to 75 Vdc Input; 50 W to 150 W Recommended Hole Pattern Component-side footprint. Dimensions are in inches and (millimeters). 2.28 (57.9) MAX 0.19 (4.8) : ree ----- | ~ O oO f 1 t 1.800 i iS _(4a.267_$t_t 1.400 ! 2 8 (35.56) for a (3558) ' 7. 2.00 1.000 ! y (50.8) | (25.40) 4! 33 66 0.700 2.40 0.400 | 10.400 (17.78) (61.0) (10.16) } 4 5 110.16) MAX rr 4 ' 1 os ! 0.20 (5.1) yi a Le - KX 4 0.50 (12.7) XX MOUNTING INSERTS MODULE OUTLINE 8-1190(C) Lucent Technologies Inc. 15JWO0O50H, JW075H, JW100H, JW150H Power Modules: Data Sheet dc-dc Converters; 36 Vdc to 75 Vdc Input; 50 W to 150 W July 1996 Ordering Information For assistance in ordering the optional trim pin, contact your Lucent Technologies Account Manager. Input Output Output Remote On/ Device Comcode Voltage Voltage Power Off Logic Code 48V 24.0V 50 W positive JW050H 107477358 48V 24.0V 75W positive JW075H 107430266 48V 24.0V 100 W positive JW100H 107477572 48V 24.0V 150 W positive JW150H 107477432 48V 24.0V 50W negative JWO50H1 107430258 48V 24.0 V 75W negative JW075H1 107477283 48V 24.0V 100 W negative JW100H1 107430282 48V 24.0V 150 W negative JW150H1 107253197 For additional information, contact your Microelectronics Group Account Manager or the following: U.S.A.: Microelectronics Group, Lucent Technologies Inc., 555 Union Boulevard, Room 30Q-050BA, Allentown, PA 18103 1-800-372-2447, FAX 610-712-4106 (In CANADA: 1-800-553-2448, FAX 610-712-4106) ASIA PACIFIC: Microelectronics Group, Lucent Technologies Singapore Pte. Ltd., 14 Science Park Drive, #03-02A/04 The Maxwell, Singapore 0511 Tel. (65) 778 8833, FAX (65) 777 7495 JAPAN: Microelectronics Group, Lucent Technologies Japan Ltd., 7-18, Higashi-Gotanda 2-chome, Shinagawa-ku, Tokyo 141, Japan Tel. (81) 3 5421 1600, FAX (81) 3 5421 1700 For data requests in Europe: MICROELECTRONICS GROUP DATALINE: Tel. (44) 1734 324 299, FAX (44) 1734 328 148 For technical inquiries in Europe: CENTRAL EUROPE: (49) 89 95086 0 (Munich), NORTHERN EUROPE: (44) 1344 865 900 (Bracknell UK), FRANCE: (33) 1 47 67 47 67 (Paris), SOUTHERN EUROPE: (39) 2 6601 1800 (Milan) or (34) 1 807 1700 (Madrid) Lucent Technologies Inc. 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. Copyright 1996 Lucent Technologies inc. microelectronics group All Rights Reserved Printed in U.S.A. July 1996 DS95-174EPS & tu 1 Labs clogies Printed On Recycled Paper