Data Sheet April 2008 JAW050A and JAW075A Power Modules; dc-dc Converters: 36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W Features n The JAW Series Power Modules use surface-mount technology and deliver efficient and compact dc-dc conversion. n High power density n High efficiency: 84% typical n Low output noise n Constant frequency n Industry-standard pinout n Metal case n 2:1 input voltage range n Applications n n Distributed power architectures Establishing 5 V local power bus to feed point-of-load converters in 48 V bus systems Remote on/off and remote sense n Adjustable output voltage n Case ground pin Options n Heat sinks available for extended operation n Choice of remote on/off logic configuration n Choice of short lead lengths Overtemperature, overvoltage, and overcurrent protection n n n Small size: 61.0 mm x 57.9 mm x 12.7 mm (2.40 in. x 2.28 in. x 0.50 in.) n Manufacturing facilities registered against the ISO*9000 series standards UL† 60950 Recognized, CSA‡ C22.2 No. 60950-00 Certified, and VDE § 0805 (IEC** 60950, 4th Edition) Licensed CE mark meets 73/23/EEC and 93/68/EEC directives†† Description The JAW050A and JAW075A Power Modules are dc-dc converters that operate over an input voltage range of 36 Vdc to 75 Vdc and provide a 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 50 W to 75 W at a typical full-load efficiency of 84%. The sealed modules offer a metal baseplate for improved 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. ** IEC is a trademark of International Elektrotechniker Commission. †† 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.) JAW050A and JAW075A Power Modules; dc-dc Converters: 36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W Data Sheet April 2008 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 — — 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 — — — — 3.0 3.5 A A II, max II, max — — — — 1.7 2.6 A A Inrush Transient i 2t — — 1.0 A2s Input Reflected-ripple Current, Peak-to-peak (5 Hz to 20 MHz, 12 µH source impedance; see Figure 11.) 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: JAW050A (See Figure 1.) JAW075A (See Figure 2.) VI = 36 V to 75 V; IO = IO, max: JAW050A JAW075A 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 Lineage Power JAW050A and JAW075A Power Modules; dc-dc Converters: 36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W Data Sheet April 2008 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 4.92 5.0 5.08 Vdc Output Voltage (Over all operating input voltage, resistive load, and temperature conditions until end of life. See Figure 13.) All VO 4.85 — 5.15 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 12.): RMS Peak-to-peak (5 Hz to 20 MHz) All All — — — — — — 40 150 mVrms mVp-p External Load Capacitance All — 0 — * µF Output Current (At IO < IO, min, the modules may exceed output ripple specifications.) JAW050A JAW075A IO IO 0.5 0.5 — — 10 15 A A Output Current-limit Inception (VO = 90% of VO, nom) JAW050A JAW075A IO, cli IO, cli — — 12.0 18.0 14† 21† A A Output Short-circuit Current (VO = 250 mV) All — — 170 — %IO, max Efficiency (VI = 48 V; IO = IO, max; TC = 70 °C; see Figure 13.) JAW050A JAW075A η η — — 84 84 — — % % All — — 320 — kHz All All — — — — 5 300 — — %VO, Switching Frequency Dynamic Response (ΔIO/Δt = 1 A/10 µs, VI = 48 V, TC = 25 °C; tested without any load capacitance.): 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) set µs All All — — — — 5 300 — — %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 Parameter Min Typ Max Unit Isolation Capacitance — 2500 — pF Isolation Resistance 10 — — MΩ Lineage Power 3 JAW050A and JAW075A Power Modules; dc-dc Converters: 36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W Data Sheet April 2008 General Specifications Parameter Min Calculated MTBF (IO = 80% of IO, max; TC = 40 °C) Weight Typ Max Unit 100 (3.5) g (oz.) 3,000,000 — hours — Feature Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See the Feature Descriptions section 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): JAWxxxA1 Preferred Logic: Logic Low—Module On Logic High—Module Off JAWxxxA 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 10.) (IO = 80% of IO, max; VO within ±1% of steady state) Output Voltage Adjustment: Output Voltage Remote-sense Range Output Voltage Set-point Adjustment Range (trim) Output Overvoltage Protection Overtemperature Protection Symbol Min Typ Max Unit Von/off Ion/off 0 — — — 1.2 1.0 V mA Von/off Ion/off — — — — — — 40 15 50 80 V µA ms — — — 60 — — 0.5 110 V %VO, nom VO, sd 5.9* — 7.0* V TC — 105 — °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 the electrical board 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 the Board-Mounted Power Modules: Soldering and Cleaning Application Note (AP97-021EPS). 4 Lineage Power JAW050A and JAW075A Power Modules; dc-dc Converters: 36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W Data Sheet April 2008 Characteristic Curves The following figures provide typical characteristics for the power modules. The figures are identical for both on/off configurations. 84 83 INPUT CURRENT, II (A) 1.6 IO = 10 A IO = 5 A IO = 0.5 A 1.4 1.2 1.0 0.8 0.6 0.4 EFFICIENCY, η (%) 1.8 81 80 79 78 VI = 36 V VI = 55 V VI = 75 V 77 76 0.2 0.0 0 82 75 74 3 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 4 5 6 7 8 9 OUTPUT CURRENT, IO (A) INPUT VOLTAGE, VI (V) 8-3329(F) 8-3327(F) Figure 1. Typical JAW050A Input Characteristics at Room Temperature Figure 3. Typical JAW050A Efficiency vs. Output Current at Room Temperature 85 84 IO = 15 A IO = 7.5 A IO = 1.5 A 2.0 1.5 1.0 83 82 81 VI = 36 V VI = 55 V VI = 75 V 80 79 78 77 0.5 0.0 0 EFFICIENCY, η (%) INPUT CURRENT, II (A) 3.0 2.5 10 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 4 5 6 7 8 9 10 11 12 13 14 15 OUTPUT CURRENT, IO (A) INPUT VOLTAGE, VI (V) 8-3328(F) Figure 2. Typical JAW075A Input Characteristics at Room Temperature Lineage Power 76 75 3 8-3330(F) Figure 4. Typical JAW075A Efficiency vs. Output Current at Room Temperature 5 JAW050A and JAW075A Power Modules; dc-dc Converters: 36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W Data Sheet April 2008 OUTPUT VOLTAGE, VO (V) (100 mV/div) Characteristic Curves (continued) OUTPUT CURRENT, IO (A) (1 A/div) OUTPUT VOLTAGE, VO (V) (50 mV/div) IO = 1.0 A IO = 7.5 A 7.5 A IO = 15 A TIME, t (200 μs/div) 8-3332(F) Note: Tested without any load capacitance. TIME, t (5 μs/div) 8-3331(F) Note: See Figure 12 for test conditions. OUTPUT CURRENT, IO (A) (1 A/div) OUTPUT CURRENT, IO (A) (1 A/div) OUTPUT VOLTAGE, VO (V) (200 mV/div) OUTPUT VOLTAGE, VO (V) (200 mV/div) Figure 5. Typical JAW075A Output Ripple Voltage at Room Temperature and 48 Vdc Input Figure 7. Typical JAW075A 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.) 2.5 A 5A TIME, t (50 μs/div) TIME, t (50 μs/div) 1-0097 1-0098 Note: Tested without any load capacitance. Note: Tested without any load capacitance. Figure 6. Typical JAW050A 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.) Figure 8. Typical JAW050A 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.) 6 Lineage Power JAW050A and JAW075A Power Modules; dc-dc Converters: 36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W Data Sheet April 2008 Characteristic Curves (continued) Test Configurations OUTPUT VOLTAGE, VO (V) (100 mV/div) 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 OUTPUT CURRENT, IO (A) (1 A/div) 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. 3.7 A Figure 11. Input Reflected-Ripple Test Setup TIME, t (200 ms/div) COPPER STRIP 8-3333(F) VO(+) Note: Tested without any load capacitance. 1.0 μF Figure 9. Typical JAW075A 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.) 10 μF 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. REMOTE ON/OFF, VON/OFF (V) Figure 12. Peak-to-Peak Output Noise Measurement Test Setup SENSE(+) VI(+) OUTPUT VOLTAGE, Vo (V) (2 V/div) CONTACT AND DISTRIBUTION LOSSES VO(+) II IO LOAD SUPPLY VI(–) VO(–) 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. TIME, t (5 ms/div) 1-0099 Note: Tested without any load capacitance. Figure 10. JAW075A1 Typical Start-Up from Remote On/Off; IO = IO, max Lineage Power RESISTIVE LOAD SCOPE [ V O (+) – V O (–) ]I O η = ⎛ ------------------------------------------------⎞ x 100 ⎝ [ V I (+) – V I (–) ]I I ⎠ % Figure 13. Output Voltage and Efficiency Measurement Test Setup 7 JAW050A and JAW075A Power Modules; dc-dc Converters: 36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W Data Sheet April 2008 Design Considerations Feature Descriptions Input Source Impedance Overcurrent Protection 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 11, 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. To provide protection in an output overload condition, the unit is equipped with an internal shutdown and auto-restart 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. 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 60950, CSA C22.2 No. 60950-00, and VDE 0805 (IEC 60950, 4th Edition). 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: n n n n The input source is to be provided with reinforced insulation from any other 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. The protection mechanism is such that the unit can continue in this condition until the fault is cleared. 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 14). 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. If not using the remote on/off feature, do one of the following: n For negative logic, short the ON/OFF pin to VI(–). n For positive logic, leave the ON/OFF pin open. 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 pins and ground. 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. 8 Lineage Power JAW050A and JAW075A Power Modules; dc-dc Converters: 36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W Data Sheet April 2008 Feature Descriptions (continued) Remote On/Off (continued) SENSE(+) SENSE(–) VI(+) Ion/off + SUPPLY ON/OFF IO VI(–) Von/off – VO(+) II CONTACT RESISTANCE SENSE(+) LOAD VO(–) CONTACT AND DISTRIBUTION LOSSES 8-651(F).m VO(+) LOAD VI(+) VI(–) Figure 15. Effective Circuit Configuration for Single-Module Remote-Sense Operation VO(–) SENSE(–) 8-720(F).c Figure 14. Remote On/Off Implementation 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 output voltage sense range given in the Feature Specifications table, i.e.: [VO(+) – VO(–)] – [SENSE(+) – SENSE(–)] ≤ 0.5 V The voltage between the VO(+) and VO(–) terminals must not exceed the minimum output overvoltage protection voltage as 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 15. 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. 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. Lineage Power Output Voltage Set-Point Adjustment (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. The trim resistor should be positioned close to the module. If not using the trim feature, leave the TRIM pin open. With an external resistor between the TRIM and SENSE(–) pins (Radj-down), the output voltage set point (VO, adj) decreases (see Figure 16). The following equation determines the required external-resistor value to obtain a percentage output voltage change of Δ%. 1000 R adj-down = ⎛ ------------- – 11⎞ kΩ ⎝ Δ% ⎠ With an external resistor connected between the TRIM and SENSE(+) pins (Radj-up), the output voltage set point (VO, adj) increases (see Figure 17). The following equation determines the required external-resistor value to obtain a percentage output voltage change of Δ%. R adj-up Δ% ⎛ ( V O, nom ) ( 1 + --------⎞ - ) – 1.225 100 ⎜ = ------------------------------------------------------------------------ 1000 – 11⎟ kΩ ⎜ ⎟ 1.225Δ% ⎝ ⎠ The voltage between the VO(+) and VO(–) terminals must not exceed the minimum output overvoltage protection voltage as 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 15. 9 JAW050A and JAW075A Power Modules; dc-dc Converters: 36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W Data Sheet April 2008 Feature Descriptions (continued) Output Overvoltage Protection Output Voltage Set-Point Adjustment (Trim) To provide protection in an output overvoltage condition, the unit is equipped with circuitry that monitors the voltage on the output terminals. If the voltage on the output terminals exceed the overvoltage protection threshold, 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. (continued) 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. VI(+) ON/OFF CASE Overtemperature Protection These modules feature an overtemperature protection circuit to safeguard against thermal damage. The circuit shuts down when the maximum case temperature is exceeded. The module will automatically restart when the case temperature cools sufficiently. Thermal Considerations VO(+) SENSE(+) Introduction TRIM RLOAD Radj-down VI(–) The protection mechanism is such that the unit can continue in this condition until the fault is cleared. SENSE(–) VO(–) 8-748(F).b Figure 16. Circuit Configuration to Decrease Output Voltage 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 18. MEASURE CASE TEMPERATURE HERE VI(+) ON/OFF VO(+) SENSE(+) VI(+) Radj-up CASE TRIM ON/OFF RLOAD VO(+) + SEN TRIM VI(–) SENSE(–) 30.5 (1.20) VO(–) CASE VI(–) – SEN VO(–) 8-715(F).b 29.0 (1.14) Figure 17. Circuit Configuration to Increase Output Voltage 10 8-716(F).h Note: Top view, pin locations are for reference only. Measurements are shown in millimeters and (inches). Figure 18. Case Temperature Measurement Location Lineage Power Data Sheet April 2008 JAW050A and JAW075A Power Modules; dc-dc Converters: 36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W Thermal Considerations (continued) 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. 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. POWER DISSIPATION, PD (W) Introduction (continued) 12 11 VI = 75 V VI = 55 V VI = 36 V 10 9 8 7 6 5 4 3 0 1 2 Heat Transfer Without Heat Sinks 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 22 is shown in the following example. Example What is the minimum airflow necessary for a JAW075A operating at VI = 55 V, an output current of 15 A, transverse orientation, and a maximum ambient temperature of 55 °C? 4 5 6 7 8 9 10 8-3336(F) Figure 19. JAW050A Power Dissipation vs. Output Current at 25 °C POWER DISSIPATION, PD (W) Increasing airflow over the module enhances the heat transfer via convection. Figures 21 and 22 show 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 thermal performance is orientation dependent. Longitudinal orientation occurs when the long direction of the module is parallel to the airflow, whereas transverse orientation occurs when the short direction of the module is parallel to the airflow. 3 OUTPUT CURRENT, IO (A) 16 15 14 13 12 11 10 9 8 7 6 5 4 1 VI = 75 V VI = 55 V VI = 36 V 2 3 4 5 6 7 8 9 10 11 12 13 14 15 OUTPUT CURRENT, IO (A) 8-3337(F) Figure 20. JAW075A Power Dissipation vs. Output Current at 25 °C Solution Given: VI = 55 V IO = 15 A TA = 55 °C Determine PD (Use Figure 20.): PD = 14 W Determine airflow (v) (Use Figure 22.): v = 2.3 m/s (460 ft./min.) Lineage Power 11 JAW050A and JAW075A Power Modules; dc-dc Converters: 36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W Thermal Considerations (continued) Heat Transfer Without Heat Sinks (continued) 18 3.0 m/s (600 ft./min.) 4.0 m/s (800 ft./min.) 16 14 12 10 0.1 m/s 8 (20 ft./min.) 1.0 m/s 6 (200 ft./min.) 4 2.0 m/s (400 ft./min.) 2 10 20 (TC – TA) C, max θ ca = ΔT --------------------- = ------------------------ 30 40 50 60 70 80 90 100 LOCAL AMBIENT TEMPERATURE, TA (°C) 8-2465(F) Figure 21. Forced Convection Power Derating with No Heat Sink; Longitudinal Orientation The location to measure case temperature (TC) is shown in Figure 18. Case-to-ambient thermal resistance vs. airflow for various heat sink configurations and heights is shown in Figures 23 and 24. These curves were obtained by experimental testing of heat sinks, which are offered in the product catalog. 20 8 7 5 4 3 2 1 3.0 m/s (600 ft./min.) 4.0 m/s (800 ft./min.) 16 14 NO HEAT SINK 1/4 IN. HEAT SINK 1/2 IN. HEAT SINK 1 IN. HEAT SINK 1 1/2 IN. HEAT SINK 6 0 18 0 0.5 (100) 1.0 (200) 1.5 (300) 2.5 (500) 2.0 (400) 3.0 (600) AIR VELOCITY, m/s (ft./min.) 8-2164(F).a 12 Figure 23. Case-to-Ambient Thermal Resistance Curves; Longitudinal Orientation 10 8 0.1 m/s (20 ft.min.) 6 1.0 m/s (200 ft./min.) 4 2.0 m/s 2 (400 ft./min.) 8 0 0 10 20 30 40 50 60 70 80 90 100 LOCAL AMBIENT TEMPERATURE, TA (°C) 8-2466(F) Figure 22. Forced Convection Power Derating with No Heat Sink; Transverse Orientation 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.). CASE-TO-AMBIENT THERMAL RESISTANCE, θCA (°C/W) POWER DISSIPATION, PD (W) PD PD 9 0 0 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 (ΔTC, max) divided by the module power dissipation (PD): CASE-TO-AMBIENT THERMAL RESISTANCE, θCA (°C/W) POWER DISSIPATION, PD (W) 20 Data Sheet April 2008 7 NO HEAT SINK 1/4 IN. HEAT SINK 1/2 IN. HEAT SINK 1 IN. HEAT SINK 1 1/2 IN. HEAT SINK 6 5 4 3 2 1 0 0 0.5 (100) 1.0 (200) 1.5 (300) 2.5 (500) 2.0 (400) 3.0 (600) AIR VELOCITY, m/s (ft./min.) 8-2165(F).a Figure 24. Case-to-Ambient Thermal Resistance Curves; Transverse Orientation 12 Lineage Power JAW050A and JAW075A Power Modules; dc-dc Converters: 36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W Data Sheet April 2008 Thermal Considerations (continued) Custom Heat Sinks Heat Transfer with Heat Sinks (continued) 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 25. 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 Figures 23 and 24 had a thermal-conductive dry pad between the case and the heat sink to minimize contact resistance. The use of Figure 23 is shown in the following example. PD TC TS θcs TA θsa 8-1304(F).e Figure 25. Resistance from Case-to-Sink and Sink-to-Ambient Example If an 82 °C case temperature is desired, what is the minimum airflow necessary? Assume the JAW075A module is operating at VI = 55 V, an output current of 15 A, longitudinal orientation, maximum ambient air temperature of 40 °C, and the heat sink is 1/4 inch. 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 θ sa = ------------------------- – θ cs Solution Given: VI = 55 V IO = 15 A TA = 40 °C TC = 82 °C Heat sink = 1/4 inch. Determine PD by using Figure 20: 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. PD = 14 W Then solve the following equation: (TC – TA) θ ca = ----------------------PD 82 – 40 ) θ ca = (----------------------- EMC Considerations For assistance with designing for EMC compliance, refer to the FLTR100V10 Filter Module Data Sheet (DS99-294EPS). 14 θ ca = 3.0 °C/W Use Figure 23 to determine air velocity for the 1/4 inch heat sink. The minimum airflow necessary for this module is 1.1 m/s (220 ft./min.). Lineage Power Layout Considerations Copper paths must not be routed beneath the power module standoffs. For additional layout guidelines, refer to the FLTR100V10 Filter Module Data Sheet (DS99-294EPS). 13 JAW050A and JAW075A Power Modules; dc-dc Converters: 36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W Data Sheet April 2008 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) 1.02 (0.040) DIA SOLDER-PLATED BRASS, 7 PLACES 4.1 (0.16) MIN† 2.06 (0.081) DIA SOLDERPLATED BRASS, 2 PLACES (VO(−) AND VO(+)) 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) 35.56 (1.400) VI(−) VO(−) CASE −SEN TRIM 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) 4.8 (0.19) 48.3 (1.90) 8-716(F).j * Side label includes Lineage name, product designation, safety agency markings, input/output voltage and current ratings, and bar code. † The case pin length is 5.3 (0.21), i.e., 1.2 (0.05) longer than the other pins. 14 Lineage Power JAW050A and JAW075A Power Modules; dc-dc Converters: 36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W Data Sheet April 2008 Recommended Hole Pattern Component-side footprint. Dimensions are in millimeters and (inches). 57.9 (2.28) 4.8 (0.19) 48.3 (1.90) VI(+) 35.56 (1.400) 50.8 (2.00) 48.26 (1.900) TERMINALS 61.0 (2.40) VO(+) 35.56 (1.400) +SEN ON/OFF 25.40 (1.000) TRIM 25.40 (1.000) 10.16 (0.400) CASE −SEN VI(−) VO(−) 10.16 (0.400) 17.78 (0.700) 5.1 (0.20) 12.7 (0.50) MODULE OUTLINE 8-716(F).j Ordering Information Please contact your Lineage Power Account Manager or Field Application Engineer for pricing and availability. Table 4. Device Codes Input Voltage Output Voltage Output Power Output Current Remote On/Off Logic Device Code Comcode 48 Vdc 5.0 Vdc 50 W 10 A Negative JAW050A1 108209974 48 Vdc 5.0 Vdc 75 W 15 A Negative JAW075A1 108064353 48 Vdc 5.0 Vdc 50 W 10 A Positive JAW050A 108449323 48 Vdc 5.0 Vdc 75 W 15 A Positive JAW075A 108449422 Optional features can be ordered using the suffixes shown in Table 5. To order more than one option, list the device codes suffixes in numerically descending order. For example, the device code for a JAW075A module with the following option is shown below: Short pins: 3.68 mm ± 0.25 mm (0.145 in. ± 0.010 in.) JAW075A6 Table 5. Device Options Option Short pins: 2.79 mm ± 0.25 mm (0.110 in. +0.020 in./–0.010 in.) Short pins: 3.68 mm ± 0.25 mm (0.145 in. ± 0.010 in.) Lineage Power Device Code Suffix 8 6 15 JAW050A and JAW075A Power Modules; dc-dc Converters: 36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W Data Sheet April 2008 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. 57.9 (2.28) 61 (2.4) 8-2832(F).a Figure 26. Longitudinal Heat Sink 8-2833(F) Figure 27. Transverse Heat Sink A sia-Pacific Head qu art ers T el: +65 6 41 6 4283 World W ide Headq u arters Lin eag e Po wer Co rp oratio n 30 00 Sk yline D riv e, Mes quite, T X 75149, U SA +1-800-526-7819 (Outs id e U .S.A .: +1- 97 2-2 84 -2626) www.line ag ep ower.co m e-m ail: tech sup port1@ lin ea gep ower.co m Eu ro pe, M id dle-East an d Afric a He ad qu arters T el: +49 8 9 6089 286 Ind ia Head qu arters T el: +91 8 0 28411633 Lineage Power reserves the right to make changes to the produc t(s) or information contained herein without notice. No liability is ass umed as a res ult of their use or applic ation. No rights under any patent acc ompany the sale of any s uc h pr oduct(s ) or information. © 2008 Lineage Power Corpor ation, (Mesquite, Texas ) All International Rights Res er ved. April 2008 DS00-326EPS (Replaces DS00-325EPS)