Data Sheet August 2000 JAHW050F, JAHW075F, and JAHW100F Power Modules: dc-dc Converters; 36 to 75 Vdc Input, 3.3 Vdc Output; 33 W to 66 W Features The JAHW Series Power Modules use advanced, surfacemount technology and deliver high-quality, efficient, and compact dc-dc conversion. Applications ■ Small size: 61.0 mm x 57.9 mm x 12.7 mm (2.40 in. x 2.28 in. x 0.50 in.) ■ High power density ■ Very high efficiency: 88% typical ■ Low output noise ■ Constant frequency ■ Industry-standard pinout ■ Metal baseplate ■ 2:1 input voltage range ■ Overtemperature protection ■ Overcurrent protection ■ Output overvoltage protection ■ Remote sense ■ Remote on/off ■ Distributed power architectures ■ Adjustable output voltage ■ Computer equipment ■ Case ground pin ■ Communications equipment ■ Auto-restart after overcurrent shutdown ■ ISO * 9001 Certified manufacturing facilities Options ■ ■ Heat sinks available for extended operation ■ Choice of remote on/off logic configuration ■ UL † 1950 Recognized, CSA‡ 22.2 No. 950-95 Certified, and VDE § 0805 (EN60950, IEC950) Licensed CE mark meets 73/23/EEC and 93/68/EEC directives** Description The JAHW050F, JAHW075F, and JAHW100F Power Modules are dc-dc converters that operate over an input voltage range of 36 Vdc to 75 Vdc and provide a precisely regulated dc output. The outputs are fully isolated from the inputs, allowing versatile polarity configurations and grounding connections. The modules have maximum power ratings from 33 W to 66 W at a typical full-load efficiency of 88%. The sealed modules offer a metal baseplate for excellent 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. * ISO is a registered trademark of the International Organization for Standardization. † 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. ** 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.) JAHW050F, JAHW075F, and JAHW100F Power Modules: dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W Data Sheet August 2000 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 VI VI, trans — — 80 100 Vdc V Operating Case Temperature (See Thermal Considerations section.) TC –40 100 °C Storage Temperature Tstg –55 125 °C I/O Isolation Voltage (for 1 minute) — — 1500 Vdc Input Voltage: Continuous Transient (100 ms) Electrical Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. Table 1. Input Specifications Parameter Symbol Min Typ Max Unit VI 36 48 75 Vdc II, max II, max II, max — — — — — — 1.2 1.8 2.4 A A A Inrush Transient i2t — — 1.0 A2s Input Reflected-ripple Current, Peak-to-peak (5 Hz to 20 MHz, 12 µH source impedance; see Figure 16.) II — 5 — mAp-p Input Ripple Rejection (120 Hz) — — 60 — dB Operating Input Voltage Maximum Input Current (VI = 0 V to 75 V; IO = IO, max): JAHW050F (See Figure 1.) JAHW075F (See Figure 2.) JAHW100F (See Figure 3.) 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 flexibility, internal fusing is not included; however, to achieve maximum safety and system protection, always use an input line fuse. The safety agencies require a normal-blow fuse with a maximum rating of 6 A (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 for further information. 2 Lucent Technologies Inc. JAHW050F, JAHW075F, and JAHW100F Power Modules: dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W Data Sheet August 2000 Electrical Specifications (continued) Table 2. Output Specifications Device Symbol Min Typ Max Unit Output Voltage Set Point (VI = 48 V; IO = IO, max; TC = 25 °C) Parameter All VO, set 3.25 3.3 3.35 Vdc Output Voltage (Over all operating input voltage, static resistive load, and temperature conditions until end of life. See Figure 18.) All VO 3.20 — 3.40 Vdc Output Regulation: Line (VI = 36 V to 75 V) Load (IO = IO, min to IO, max) Temperature (TC = –40 °C to +100 °C) All All All — — — — — — 0.01 0.05 15 0.1 0.2 50 %VO %VO mV Output Ripple and Noise Voltage (See Figure 17.): RMS Peak-to-peak (5 Hz to 20 MHz) All All — — — — — — 50 100 mVrms mVp-p External Load Capacitance All — 0 — * µF Output Current (At IO < IO, min, the modules may exceed output ripple specifications.) JAHW050F JAHW075F JAHW100F IO IO IO 0.5 0.5 0.5 — — — 10 15 20 A A A Output Current-limit Inception (VO = 90% of VO, nom) JAHW050F JAHW075F JAHW100F IO, cli IO, cli IO, cli — — — 12 18 23 15† 20† 25† A A A Output Short-circuit Current (VO = 250 mV) Efficiency (VI = 48 V; IO = IO, max; TC = 70 °C) Switching Frequency Dynamic Response (∆IO/∆t = 1 A/10 µs, VI = 48 V, TC = 25 °C; tested with a 10 µF aluminum and a 1.0 µF tantalum capacitor across the load.): Load Change from IO = 50% to 75% of IO, max: Peak Deviation Settling Time (VO < 10% of peak deviation) Load Change from IO = 50% to 25% of IO, max: Peak Deviation Settling Time (VO < 10% of peak deviation) All — — 170 — %IO, max JAHW050F JAHW075F JAHW100F η η η — — — 88 88.6 89.2 — — — % % % All — — 340 — kHz All All — — — — 2 200 — — %VO, set µs All All — — — — 2 200 — — %VO, set µs * Consult your sales representative or the factory. † These are manufacturing test limits. In some situations, results may differ. Table 3. Isolation Specifications Min Typ Max Unit Isolation Capacitance Parameter — 2500 — pF Isolation Resistance 10 — — MΩ Lucent Technologies Inc. 3 JAHW050F, JAHW075F, and JAHW100F Power Modules: dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W Data Sheet August 2000 General Specifications Parameter Min Calculated MTBF (IO = 80% of IO, max; TC = 40 °C) Weight Typ Max 2,700,000 — Unit hours — 100 (3.5) g (oz.) Feature Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See Feature Descriptions for additional information. Parameter Remote On/Off Signal Interface (VI = 0 V to 75 V; open collector or equivalent compatible; signal referenced to VI(–) terminal; see Figure 19 and Feature Descriptions.): JAHWxxxF1 Preferred Logic: Logic Low—Module On Logic High—Module Off JAHWxxxF Optional Logic: Logic Low—Module Off Logic High—Module On Logic Low: At Ion/off = 1.0 mA At Von/off = 0.0 V Logic High: At Ion/off = 0.0 µA Leakage Current Turn-on Time (See Figure 15.) (IO = 80% of IO, max; VO within ±1% of steady state) Output Voltage Adjustment (See Feature Descriptions.): Output Voltage Remote-sense Range Output Voltage Set-point Adjustment Range (trim) Output Overvoltage Protection Overtemperature Protection (See Feature Descriptions.) Symbol Min Typ Max Unit Von/off Ion/off 0 — — — 1.2 1.0 V mA Von/off Ion/off — — — — — — 20 15 50 35 V µA ms — — — 60 — — 0.5 110 V %VO, nom VO, sd 4.0* — 5.0* V TC — 110 — °C * These are manufacturing test limits. In some situations, results may differ. Solder, Cleaning, and Drying Considerations Post solder cleaning is usually the final circuit-board assembly process prior to electrical testing. The result of inadequate circuit-board 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 Lucent Technologies Board-Mounted Power Modules Soldering and Cleaning Application Note (AP97-021EPS). 4 Lucent Technologies Inc. JAHW050F, JAHW075F, and JAHW100F Power Modules: dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W Data Sheet August 2000 Characteristic Curves 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 2.5 IO = 10 A IO = 5 A IO = 0.5 A INPUT CURRENT, II (A) INPUT CURRENT, II (A) The following figures provide typical characteristics for the power modules. The figures are identical for both on/off configurations. IO = 20 A IO = 10 A IO = 1 A 2.0 1.5 1.0 0.5 0.0 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 INPUT VOLTAGE, V I (V) INPUT VOLTAGE, VI (V) 8-2244 (F) Figure 1. Typical JAHW050F Input Characteristics at Room Temperature 8-2503 (F) Figure 3. Typical JAHW100F Input Characteristics at Room Temperature 2.0 91 90 IO = 15 A IO = 7.5 A IO = 0.75 A 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 VI = 36 V VI = 48 V VI = 75 V 89 EFFICIENCY, η (%) INPUT CURRENT, II (A) 1.8 88 87 86 85 84 83 82 0.0 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 INPUT VOLTAGE, VI (V) 2 3 4 5 6 7 8 9 10 OUTPUT CURRENT, IO (A) 8-2291 (F) Figure 2. Typical JAHW075F Input Characteristics at Room Temperature Lucent Technologies Inc. 81 8-2245 (F) Figure 4. Typical JAHW050F Converter Efficiency vs. Output Current at Room Temperature 5 JAHW050F, JAHW075F, and JAHW100F Power Modules: dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W Data Sheet August 2000 Characteristic Curves (continued) VI = 36 V EFFICIENCY, η (%) 88 87 86 85 84 VI = 36 V VI = 48 V VI = 75 V 83 82 OUTPUT VOLTAGE, VO (V) (20 mV/div) 90 89 VI = 48 V VI = 75 V 81 80 2 3 4 5 6 7 8 9 10 11 12 13 14 15 OUTPUT CURRENT, IO (A) TIME, t (1 µs/div) 8-2311 (F) 8-2293 (F) Figure 5. Typical JAHW075F Converter Efficiency vs. Output Current at Room Temperature Note: See Figure 17 for test conditions. Figure 7. Typical JAHW050F and JAHW075F Output Ripple Voltage at Room Temperature and IO = IO, max 91 90 88 36 V 87 86 85 84 83 VI = 36 V VI = 48 V VI = 75 V 82 81 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 OUTPUT CURRENT, I O (A) 8-2485 (F) OUTPUT VOLTAGE, VO (V) (50 mV/div) EFFICIENCY, η (%) 89 48 V 75 V Figure 6. Typical JAHW100F Converter Efficiency vs. Output Current at Room Temperature TIME, t (2 µs/div) 8-2486 (F) Note: See Figure 17 for test conditions. Figure 8. Typical JAHW100F Output Ripple Voltage at Room Temperature and IO = IO, max 6 Lucent Technologies Inc. Data Sheet August 2000 JAHW050F, JAHW075F, and JAHW100F Power Modules: dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W OUTPUT CURRENT, IO (A) OUTPUT VOLTAGE, VO (V) (1 A/div) (100 mV/div) OUTPUT CURRENT, IO (A) OUTPUT VOLTAGE, VO (V) (1 A/div) (100 mV/div) Characteristic Curves (continued) 10 A 2.5 A 5A TIME, t (50 µs/div) 8-2487 (F) TIME, t (50 µs/div) 8-2378 (F) Note: Tested with a 10 µF aluminum and a 1.0 µF tantalum capacitor across the load. Figure 11. Typical JAHW100F Transient Response to Step Decrease in Load from 50% to 25% of Full Load at Room Temperature and 48 Vdc Input (Waveform Averaged to Eliminate Ripple Component.) OUTPUT CURRENT, IO (A) OUTPUT VOLTAGE, VO (V) (1 A/div) (100 mV/div) OUTPUT CURRENT, IO (A) OUTPUT VOLTAGE, VO (V) (1 A/div) (10 mV/div) Figure 9. Typical JAHW050F Transient Response to Step Decrease in Load from 50% to 25% of Full Load at Room Temperature and 48 Vdc Input (Waveform Averaged to Eliminate Ripple Component.) Note: Tested with a 10 µF aluminum and a 1.0 µF tantalum capacitor across the load. 5A 3.75 A TIME, t (50 µs/div) TIME, t (100 µs/div) 8-2294 (F) 8-2379 (F) Note: Tested with a 10 µF aluminum and a 1.0 µF tantalum capacitor across the load. Note: Tested with a 10 µF aluminum and a 1.0 µF tantalum capacitor across the load. Figure 10. Typical JAHW075F Transient Response to Step Decrease in Load from 50% to 25% of Full Load at Room Temperature and 48 Vdc Input (Waveform Averaged to Eliminate Ripple Component.) Lucent Technologies Inc. Figure 12. Typical JAHW050F Transient Response to Step Increase in Load from 50% to 75% of Full Load at Room Temperature and 48 Vdc Input (Waveform Averaged to Eliminate Ripple Component.) 7 JAHW050F, JAHW075F, and JAHW100F Power Modules: dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W Data Sheet August 2000 OUTPUT VOLTAGE, VO (V) (1 V/div) OUTPUT CURRENT, IO (A) OUTPUT VOLTAGE, VO (V) (1 A/div) (100 mV/div) REMOTE ON/OFF, VON/OFF (V) Characteristic Curves (continued) TIME, t (5 ms/div) TIME, t (100 µ s/div) 8-2296 (F) 8-2295 (F) Note: Tested with a 10 µF aluminum and a 1.0 µF tantalum capacitor across the load. Figure 15. JAHW075F Typical Start-Up from Remote On/Off; IO = IO, max OUTPUT CURRENT, IO (A) OUTPUT VOLTAGE, VO (V) (1 A/div) (100 mV/div) Figure 13. Typical JAHW075F Transient Response to Step Increase in Load from 50% to 75% of Full Load at Room Temperature and 48 Vdc Input (Waveform Averaged to Eliminate Ripple Component.) Note: Tested with a 10 µF aluminum and a 1.0 µF tantalum capacitor across the load. 15 A 10 A TIME, t (50 µs/div) 8-2488 (F) Note: Tested with a 10 µF aluminum and a 1.0 µF tantalum capacitor across the load. Figure 14. Typical JAHW075F Transient Response to Step Increase in Load from 50% to 75% of Full Load at Room Temperature and 48 Vdc Input (Waveform Averaged to Eliminate Ripple Component.) 8 Lucent Technologies Inc. JAHW050F, JAHW075F, and JAHW100F Power Modules: dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W Data Sheet August 2000 Test Configurations Design Considerations Input Source Impedance TO OSCILLOSCOPE CURRENT PROBE LTEST VI(+) 12 µH CS 220 µF ESR < 0.1 Ω @ 20 °C, 100 kHz BATTERY 33 µF ESR < 0.7 Ω @ 100 kHz VI(–) 8-203 (F).l Note: Measure input reflected-ripple current with a simulated source inductance (LTEST) of 12 µH. Capacitor CS offsets possible battery impedance. Measure current as shown above. Figure 16. Input Reflected-Ripple Test Setup COPPER STRIP VO(+) 1.0 µF 10 µF SCOPE RESISTIVE LOAD VO(–) 8-513 (F).d Note: Use a 1.0 µF ceramic capacitor and a 10 µF aluminum or tantalum capacitor. Scope measurement should be made using a BNC socket. Position the load between 51 mm and 76 mm (2 in. and 3 in.) from the module. 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 16, a 33 µF electrolytic capacitor (ESR < 0.7 Ω 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., UL1950, CSA C22.2 No. 950-95, and VDE 0805 (EN60950, IEC950). If the input source is non-SELV (ELV or a hazardous voltage greater than 60 Vdc and less than or equal to 75 Vdc), for the module’s output to be considered meeting the requirements of safety extra-low voltage (SELV), all of the following must be true: ■ The input source is to be provided with reinforced insulation from any hazardous voltages, including the ac mains. ■ One VI pin and one VO pin are to be grounded, or both the input and output pins are to be kept floating. ■ The input pins of the module are not operator accessible. ■ Another SELV reliability test is conducted on the whole system, as required by the safety agencies, on the combination of supply source and the subject module to verify that under a single fault, hazardous voltages do not appear at the module’s output. Figure 17. Peak-to-Peak Output Noise Measurement Test Setup SENSE(+) VI(+) CONTACT AND DISTRIBUTION LOSSES VO(+) II IO LOAD SUPPLY Note: Do not ground either of the input pins of the module without grounding one of the output pins. This may allow a non-SELV voltage to appear between the output pin and ground. VO(–) VI(–) CONTACT RESISTANCE SENSE(–) 8-749 (F) 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. [ V O (+) – V O (–) ] I O η = ------------------------------------------------ x 100 [ V I (+) – V I (–) ] I I % The power module has extra-low voltage (ELV) outputs when all inputs are ELV. The input to these units is to be provided with a maximum 6 A normal-blow fuse in the ungrounded lead. Figure 18. Output Voltage and Efficiency Measurement Test Setup Lucent Technologies Inc. 9 JAHW050F, JAHW075F, and JAHW100F Power Modules: dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W Data Sheet August 2000 Feature Descriptions Remote Sense Overcurrent Protection 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 output voltage sense range given in the Feature Specifications table, i.e.: To provide protection in an output overload condition, the unit is provided with internal shutdown and autorestart mechanism. At the instance of current-limit inception, the module enters a "hiccup" mode of operation whereby it shuts down and automatically attempts to restart. As long as the fault persists, the module remains in this mode. The protection mechanism is such that the unit can continue in this condition for a sufficient interval of time until the fault is cleared. [VO(+) – VO(–)] – [SENSE(+) – SENSE(–)] ≤ 0.5 V The voltage between the VO(+) and VO(–) terminals must not exceed the minimum output overvoltage shutdown value indicated in the Feature Specifications table. This limit includes any increase in voltage due to remote-sense compensation and output voltage setpoint adjustment (trim). See Figure 20. 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. 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 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, device code suffix “1,” is the factory-preferred configuration. 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 (Von/off). The switch can be an open collector or equivalent (see Figure 19). A logic low is Von/off = 0 V to 1.2 V. The maximum Ion/off 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 Von/off generated by the power module is 15 V. The maximum allowable leakage current of the switch at Von/off = 15 V is 50 µA. 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. Consult the factory if you need to increase the output voltage more than the above limitation. The amount of power delivered by the module is defined as the voltage at the output terminals multiplied by the output current. When using remote sense and trim, the output voltage of the module can be increased, which at the same output current would increase the power output of the module. Care should be taken to ensure that the maximum output power of the module remains at or below the maximum rated power. If not using the remote on/off feature, do one of the following to turn the unit on: ■ For negative logic, short ON/OFF pin to VI(–). ■ For positive logic, leave ON/OFF pin open. SENSE(+) SENSE(–) VI(+) SUPPLY Ion/off + IO VI(–) ON/OFF V on/off – CONTACT RESISTANCE VO(+) LOAD V I(–) LOAD VO(–) CONTACT AND DISTRIBUTION LOSSES 8-651 (F).m SENSE(+) VI(+) VO(+) II Figure 20. Effective Circuit Configuration for Single-Module Remote-Sense Operation VO(–) SENSE(–) 8-720 (F).c Figure 19. Remote On/Off Implementation 10 Lucent Technologies Inc. Data Sheet August 2000 JAHW050F, JAHW075F, and JAHW100F Power Modules: dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W Feature Descriptions (continued) the module remains at or below the maximum rated power. Output Voltage Set-Point Adjustment (Trim) VI(+) 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. The trim resistor should be positioned close to the module. ON/OFF CASE VO(+) SENSE(+) TRIM RLOAD Radj-down VI(–) SENSE(–) VO(–) If not using the trim feature, leave the TRIM pin open. 8-748 (F).b 1000 R adj-down = ------------- – 11 k Ω ∆% The test results for this configuration are displayed in Figure 22. This figure applies to all output voltages. With an external resistor connected between the TRIM and SENSE(+) pins (Radj-up), the output voltage set point (VO, adj) increases (see Figure 23). The following equation determines the required external-resistor value to obtain a percentage output voltage change of ∆%. R adj-up ∆% ( V O, nom ) ( 1 + ------- ) – 1.225 100 = -------------------------------------------------------------------------- 1000 1.225∆ % – 11 k Ω The voltage between the VO(+) and VO(–) terminals must not exceed the minimum output overvoltage shutdown value indicated in the Feature Specifications table. This limit includes any increase in voltage due to remote-sense compensation and output voltage setpoint adjustment (trim). See Figure 20. 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. Consult the factory if you need to increase the output voltage more than the above limitation. The amount of power delivered by the module is defined as the voltage at the output terminals multiplied by the output current. When using remote sense and trim, the output voltage of the module can be increased, which at the same output current would increase the power output of the module. Care should be taken to ensure that the maximum output power of Lucent Technologies Inc. Figure 21. Circuit Configuration to Decrease Output Voltage ADJUSTMENT RESISTOR VALUE (Ω) With an external resistor between the TRIM and SENSE(–) pins (Radj-down), the output voltage set point (VO, adj) decreases (see Figure 21). The following equation determines the required external-resistor value to obtain a percentage output voltage change of ∆%. 1M 100k 10k 0 10 20 30 40 % CHANGE IN OUTPUT VOLTAGE (∆%) 8-2470 (F) Figure 22. Resistor Selection for Decreased Output Voltage VI(+) ON/OFF VO(+) SENSE(+) Radj-up CASE VI(–) TRIM RLOAD SENSE(–) V O(–) 8-715 (F).b Figure 23. Circuit Configuration to Increase Output Voltage 11 JAHW050F, JAHW075F, and JAHW100F Power Modules: dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W Feature Descriptions (continued) Data Sheet August 2000 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. Output Overvoltage Protection The output overvoltage protection consists of circuitry that monitors the voltage on the output terminals. If the voltage on the output terminals exceeds the overvoltage protection threshold, the module will shut down and restart automatically. Although the maximum case temperature of the power modules is 100 °C, you can limit this temperature to a lower value for extremely high reliability. Heat Transfer Without Heat Sinks Overtemperature Protection To provide protection in a fault condition, the unit is equipped with an overtemperature circuit. In the event of such a fault, the module enters into an auto-restart “hiccup” mode with low output voltage until the fault is removed. Recovery from the overtemperature protection is automatic after the unit cools below the overtemperature protection threshold. Thermal Considerations Introduction 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 (TC) occurs at the position indicated in Figure 24. MEASURE CASE TEMPERATURE HERE Increasing airflow over the module enhances the heat transfer via convection. Figure 25 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 4 m/s (800 ft./min.). Note that the natural convection condition was measured at 0.05 m/s to 0.1 m/s (10 ft./min. to 20 ft./min.); however, systems in which these power modules may be used typically generate natural convection airflow rates of 0.3 m/s (60 ft./min.) due to other heat dissipating components in the system. The use of Figure 25 is shown in the following example. Example What is the minimum airflow necessary for a JAHW100F operating at VI = 48 V, an output current of 20 A, and a maximum ambient temperature of 55 °C? Solution Given: VI = 48 V IO = 20 A TA = 55 °C Determine PD (Use Figure 28.): PD = 8.0 W Determine airflow (v) (Use Figure 25.): VI(+) ON/OFF VO(+) v = 0.51 m/s (100 ft./min.) + SEN TRIM 30.5 (1.20) CASE VI(–) – SEN VO(–) 29.0 (1.14) 8-716 (F).h Note: Top view, pin locations are for reference only. Measurements shown in millimeters and (inches). Figure 24. Case Temperature Measurement Location 12 Lucent Technologies Inc. JAHW050F, JAHW075F, and JAHW100F Power Modules: dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W Data Sheet August 2000 Thermal Considerations (continued) Heat Transfer Without Heat Sinks (continued) POWER DISSIPATION, PD (W) 12 9 6 POWER DISSIPATION, PD (W) 8 NATURAL CONVECTION 1.0 m/s (200 ft./min.) 3 7 VI = 75 V VI = 48 V VI = 36 V 6 5 4 3 2 1 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 OUTPUT CURRENT, IO (A) 2.0 m/s (400 ft./min.) 8-3356 (F) 3.0 m/s (600 ft./min.) 4.0 m/s (800 ft./min.) 0 0 10 20 30 40 50 60 70 80 90 100 LOCAL AMBIENT TEMPERATURE, TA (°C) Figure 27. JAHW075F Power Dissipation vs. Output Current at 25 °C Figure 25. Forced Convection Power Derating with No Heat Sink; Either Orientation POWER DISSIPATION, PD (W) 6 5 4 3 2 10 9 8 VI = 75 V VI = 48 V VI = 36 V 7 6 5 4 3 2 1 0 0 V I = 75 V V I = 48 V VI = 36 V 1 POWER DISSIPATION, PD (W) 8-2504 (F) 2 4 6 8 10 12 14 16 18 20 OUTPUT CURRENT, IO (A) 8- 3357 (F) 0 0 1 2 3 4 5 6 7 8 9 10 OUTPUT CURRENT, IO (A) Figure 28. JAHW100F Power Dissipation vs. Output Current at 25 °C 8-3355 (F) Figure 26. JAHW050F Power Dissipation vs. Output Current at 25 °C Lucent Technologies Inc. 13 JAHW050F, JAHW075F, and JAHW100F Power Modules: dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W Thermal Considerations (continued) Example Heat Transfer with Heat Sinks The power modules have through-threaded, M3 x 0.5 mounting holes, which enable heat sinks or cold plates to attach to the module. The mounting torque must not exceed 0.56 N-m (5 in.-lb.). Thermal derating with heat sinks is expressed by using the overall thermal resistance of the module. Total module thermal resistance (θca) is defined as the maximum case temperature rise (∆TC, max) divided by the module power dissipation (PD): (TC – TA ) T C, max θ ca = ∆-------------------- = ------------------------ PD If an 85 °C case temperature is desired, what is the minimum airflow necessary? Assume the JAHW100F module is operating at VI = 48 V and an output current of 20 A, maximum ambient air temperature of 55 °C, and the heat sink is 1/4 inch. Solution Given: VI = 48 V IO = 20 A TA = 55 °C TC = 85 °C Heat sink = 1/4 inch Determine PD by using Figure 28: PD PD = 8.0 W The location to measure case temperature (TC) is shown in Figure 24. Case-to-ambient thermal resistance vs. airflow is shown, for various heat sink configurations and heights, in Figure 29. These curves were obtained by experimental testing of heat sinks, which are offered in the product catalog. Then solve the following equation: T C – T A) θ ca = (-----------------------PD 85 – 55 θ ca = (-----------------------)8.0 8 CASE-TO-AMBIENT THERMAL RESISTANCE, θCA (°C/W) Data Sheet August 2000 1 1/2 IN. HEAT SINK 7 1 IN. HEAT SINK 6 1/2 IN. HEAT SINK 5 1/4 IN. HEAT SINK NO HEAT SINK 4 θ ca = 3.75 °C/W Use Figure 29 to determine air velocity for the 1/4 inch heat sink. The minimum airflow necessary for the JAHW100F module is 1.12 m/s (220 ft./min.). 3 2 Custom Heat Sinks 1 0 0.0 (0) 0.5 (100) 1.0 (200) 1.5 (300) 2.0 (400) 2.5 3.0 (500) (600) AIR VELOCITY, m/s (ft./min.) 8-2505 (F) 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 ( θcs) and sink-to-ambient ( θsa) as shown in Figure 30. Figure 29. Case-to-Ambient Thermal Resistance Curves; Either Orientation 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 are generally lower than the resistance of the heat sink by itself. The module used to collect the data in Figure 29 had a thermal-conductive dry pad between the case and the heat sink to minimize contact resistance. The use of Figure 29 is shown in the following example. 14 PD TC TS θcs TA θsa 8-1304 (F).e Figure 30. Resistance from Case-to-Sink and Sink-to-Ambient Lucent Technologies Inc. Data Sheet August 2000 JAHW050F, JAHW075F, and JAHW100F Power Modules: dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W Thermal Considerations (continued) EMC Considerations Custom Heat Sinks (continued) For assistance with designing for EMC compliance, please refer to the FLTR100V10 data sheet (DS99-294EPS). For a managed interface using thermal grease or foils, a value of θcs = 0.1 °C/W to 0.3 °C/W is typical. The solution for heat sink resistance is: (TC – TA) PD Layout Considerations θ sa = ------------------------- – θ cs This equation assumes that all dissipated power must be shed by the heat sink. Depending on the userdefined application environment, a more accurate model, including heat transfer from the sides and bottom of the module, can be used. This equation provides a conservative estimate for such instances. Lucent Technologies Inc. Copper paths must not be routed beneath the power module mounting inserts. For additional layout guidelines, refer to the FLTR100V10 data sheet (DS99-294EPS). 15 JAHW050F, JAHW075F, and JAHW100F Power Modules: dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W Data Sheet August 2000 Outline Diagram Dimensions are in millimeters and (inches). Tolerances: x.x mm ± 0.5 mm (x.xx in. ± 0.02 in.) x.xx mm ± 0.25 mm (x.xxx in. ± 0.010 in.) Top View 57.9 (2.28) 61.0 (2.40) Side View SIDE LABEL* 0.51 (0.020) 12.7 (0.50) 4.1 (0.16) 1.02 (0.040) DIA SOLDER-PLATED BRASS, 7 PLACES † 2.06 (0.081) DIA SOLDER-PLATED BRASS, 2 PLACES (– OUTPUT AND + OUTPUT) Bottom View 12.7 (0.50) STANDOFF, 4 PLACES 7.1 (0.28) 5.1 (0.20) 7.1 (0.28) 10.16 (0.400) 50.8 (2.00) MOUNTING INSERTS M3 x 0.5 THROUGH, 4 PLACES 25.40 (1.000) VI(–) VO(–) CASE –SEN TRIM 35.56 (1.400) ON/OFF +SEN VI(+) VO(+) 10.16 (0.400) 17.78 (0.700) 25.40 (1.000) 35.56 (1.400) 48.26 (1.900) 4.7 (0.19) 48.3 (1.90) 8-716 (F).m * Side label includes Lucent logo, product designation, safety agency markings, input/output voltage and current ratings, and bar code. † The case pin is 5.4 (0.21), i.e., 1.3 (0.05) longer than the other pins. 16 Lucent Technologies Inc. JAHW050F, JAHW075F, and JAHW100F Power Modules: dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W Data Sheet August 2000 Recommended Hole Pattern Component-side footprint. Dimensions are in millimeters and (inches). 57.9 (2.28) 4.7 (0.19) 48.3 (1.90) MOUNTING HOLES VI(+) 35.56 (1.400) 50.8 (2.00) 48.26 (1.900) TERMINALS 61.0 (2.40) V O ( +) 35.56 (1.400) +SEN ON/OFF 25.40 (1.000) TRIM 25.40 (1.000) 10.16 (0.400) CASE −SEN VI(−) V O ( −) 10.16 (0.400) 17.78 (0.700) 5.1 (0.20) 12.7 (0.50) MODULE OUTLINE 8-716 (F).m Ordering Information Table 4. Device Codes Input Voltage Output Voltage Output Power Remote On/Off Logic Device Code Comcode 48 V 3.3 V 33 W Negative JAHW050F1 108288448 48 V 3.3 V 50 W Negative JAHW075F1 108219320 48 V 3.3 V 66 W Negative JAHW100F1 108064510 48 V 3.3 V 33 W Positive JAHW050F 108866245 48 V 3.3 V 50 W Positive JAHW075F 108489089 48 V 3.3 V 66 W Positive JAHW100F 108626102 Optional features can be ordered using the suffixes shown in Table 5. The suffixes follow the last letter of the device code and are placed in descending order. For example, the device codes for a JAHW075F module with the following options are shown below: Positive logic JAHW075F Negative logic JAHW075F1 Table 5. Device Options Option Suffix Negative remote on/off logic Positive remote on/off logic 1 — Lucent Technologies Inc. 17 JAHW050F, JAHW075F, and JAHW100F Power Modules: dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W Data Sheet August 2000 Ordering Information (continued) Table 6. Device Accessories Accessory Comcode 1/4 in. transverse kit (heat sink, thermal pad, and screws) 1/4 in. longitudinal kit (heat sink, thermal pad, and screws) 1/2 in. transverse kit (heat sink, thermal pad, and screws) 1/2 in. longitudinal kit (heat sink, thermal pad, and screws) 1 in. transverse kit (heat sink, thermal pad, and screws) 1 in. longitudinal kit (heat sink, thermal pad, and screws) 1 1/2 in. transverse kit (heat sink, thermal pad, and screws) 1 1/2 in. longitudinal kit (heat sink, thermal pad, and screws) 407243989 407243997 407244706 407244714 407244722 407244730 407244748 407244755 Dimensions are in millimeters and (inches). 1/4 IN. 1/4 IN. 1/2 IN. 1/2 IN. 1 IN. 1 IN. 61 (2.4) 57.9 (2.28) 1 1/2 IN. 1 1/2 IN. 61 (2.4) 57.9 (2.28) 8-2832 (F) Figure 31. Longitudinal Heat Sink 18 8-2833 (F) Figure 32. Transverse Heat Sink Lucent Technologies Inc. Data Sheet August 2000 JAHW050F, JAHW075F, and JAHW100F Power Modules: dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W Notes Lucent Technologies Inc. 19 JAHW050F, JAHW075F, and JAHW100F Power Modules: dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W Data Sheet August 2000 For additional information, contact your Lucent Technologies Account Manager or the following: POWER SYSTEMS UNIT: Network Products Group, Lucent Technologies Inc., 3000 Skyline Drive, Mesquite, TX 75149, USA +1-800-526-7819 (Outside U.S.A.: +1-972-284-2626, FAX +1-888-315-5182) (product-related questions or technical assistance) INTERNET: http://www.lucent.com/networks/power E-MAIL: [email protected] ASIA PACIFIC: Lucent Technologies Singapore Pte. Ltd., 750D Chai Chee Road #07-06, Chai Chee Industrial Park, Singapore 469004 Tel. (65) 240 8041, FAX (65) 240 8438 CHINA: Lucent Technologies (China) Co. Ltd., SCITECH Place No. 22 Jian Guo Man Wai Avenue, Beijing 100004, PRC Tel. (86) 10-6522 5566 ext. 4187, FAX (86) 10-6512 3694 JAPAN: Lucent Technologies Japan Ltd., Mori Building No. 21, 4-33, Roppongi 1-chome, Minato-ku, Tokyo 106-8508, Japan Tel. (81) 3 5561 5831, FAX (81) 3 5561 1616 LATIN AMERICA: Lucent Technologies Inc., Room 416, 2333 Ponce de Leon Blvd., Coral Gables, FL 33134, USA Tel. +1-305-569-4722, FAX +1-305-569-3820 EUROPE: Technical Inquiries: GERMANY: (49) 89 95086 0 (Munich), UNITED KINGDOM: (44) 1344 865 900 (Ascot), FRANCE: (33) 1 40 83 68 00 (Paris), SWEDEN: (46) 8 594 607 00 (Stockholm), FINLAND: (358) 9 4354 2800 (Helsinki), ITALY: (39) 02 6608131 (Milan), SPAIN: (34) 91 807 1441 (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 © 2000 Lucent Technologies Inc. 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