Data Sheet September 1997 FW150F Power Module: dc-dc Converter; 36 to 72 Vdc Input, 3.3 Vdc Output; 99 W Features Wide input range High efficiency: 75% typical Parallel operation with load sharing Low profile: 12.7 mm (0.5 in.) Complete input and output filtering Constant frequency Case ground pin Input-to-output isolation Remote sense Remote on/off Short-circuit protection Output overvoltage clamp UL* Recognized, CSA Certified, VDE Licensed The FW150F Power Module uses advanced, surface-mount technology and delivers high-quality, compact, dc-dc conversion at an economical price. * UL is a registered trademark of Underwriters Laboratories, Inc. CSA is a registered trademark of Canadian Standards Association. Applications Options Distributed and redundant power architectures Telecommunications Output voltage set-point adjustment (trim) Description The FW150F Power Module is a dc-dc converter that operates over an input voltage range of 36 Vdc to 72 Vdc and provides a precisely regulated dc output. The output is fully isolated from the input, allowing versatile polarity configurations and grounding connections. The module has a maximum power rating of 99 W at a typical full-load efficiency of 75%. Built-in filtering, for both the input and output, eliminates the need for external filters. Two or more modules may be paralleled with forced load sharing for redundant or enhanced power applications. The package, which mounts on a printed-circuit board, accommodates a heat sink for high-temperature applications. FW150F Power Module: dc-dc Converter; 36 to 72 Vdc Input, 3.3 Vdc Output; 99 W Data Sheet September 1997 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 Input Voltage (continuous) I/O Isolation Voltage Operating Case Temperature (See Thermal Considerations section and Figure 17.) Storage Temperature Symbol VI -- TC Min -- -- 0 Max 72 500 90 Unit Vdc V C Tstg -40 125 C Electrical Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. Table 1. Input Specifications Parameter Operating Input Voltage Maximum Input Current (VI = 0 V to 72 V): Inrush Transient Input Reflected-ripple Current, Peak-to-peak (5 Hz to 20 MHz, 12 H source impedance) (See Figure 8.) Input Ripple Rejection (120 Hz) Symbol VI II, max i2t Min 36 -- -- Typ 48 -- -- Max 72 4.2 1.0 Unit Vdc A A2s -- -- 20 -- mAp-p -- -- 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 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, dc fuse with a maximum rating of 20 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 Tyco Electronics Corp. Data Sheet September 1997 FW150F Power Module: dc-dc Converter; 36 to 72 Vdc Input, 3.3 Vdc Output; 99 W Electrical Specifications (continued) Table 2. Output Specifications Parameter Output Voltage (Over all operating input voltage, resistive load, and temperature conditions until end of life; see Figure 9 and Feature Descriptions.) Output Voltage Set Point (VI = 48 V; IO = IO, max; TC = 25 C): Unit Operating in Parallel or PARALLEL Pin Shorted to SENSE(-) (See Figure 9 and Feature Descriptions.) PARALLEL Pin Open Output Regulation: Line (VI = 36 V to 72 V) Load (IO = IO, min to IO, max) Temperature (TC = 0 C to 90 C) Output Ripple and Noise Voltage: RMS Peak-to-peak (5 Hz to 20 MHz) Output Current (At IO < IO, min, the modules may exceed output ripple specifications.): Output Current-limit Inception (VO = 3.0 V; see Feature Descriptions.) Output Short-circuit Current (VO = 250 mV) External Load Capacitance (electrolytic, total for one unit or multiple paralleled units) Efficiency (VI = 48 V; IO = IO, max; TC = 25 C; see Figure 9.) Dynamic Response (IO/t = 1 A/10 s, VI = 48 V, TC = 25 C): 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) Tyco Electronics Corp. Symbol VO Min 3.140 Typ -- Max 3.460 Unit Vdc VO, set 3.230 3.300 3.370 Vdc VO, set 3.230 3.300 3.432 Vdc -- -- -- -- -- -- 0.05 0.1 10 0.2 0.4 50 % % mV -- -- -- -- -- -- 35 100 mVrms mVp-p IO -- -- 30 130 A IO, cli 1 103 % IO, max -- -- 135 170 % IO, max -- 0 -- 4000 F 72 75 -- % -- -- -- -- 150 300 -- -- mV s -- -- -- -- 150 300 -- -- mV s 3 FW150F Power Module: dc-dc Converter; 36 to 72 Vdc Input, 3.3 Vdc Output; 99 W Data Sheet September 1997 Electrical Specifications (continued) Table 3. Isolation Specifications Parameter Isolation Capacitance Isolation Resistance Min -- 10 Typ 1700 -- Max -- -- Unit pF M Min Typ 920,000 -- Max Unit hours g (oz.) General Specifications Parameter Calculated MTBF (IO = 80% of IO, max; TC = 40 C) Weight -- 200 (7) Feature Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See Feature Descriptions for further information. Parameter Remote On/Off Signal Interface (VI = 0 V to 72 V; open collector or equivalent compatible; signal referenced to VI (-) terminal; see Figure 11 and Feature Descriptions.): Logic Low--Module On Logic High--Module Off Logic Low: At Ion/off = 1.0 mA At Von/off = 0.0 V Logic High: At Ion/off = 0.0 A At Von/off = 15 V Turn-on Time (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) Parallel Operation Load Sharing (See Feature Descriptions.) Output Overvoltage Clamp 4 Symbol Min Typ Max Unit Von/off Ion/off 0 -- -- -- 1.2 1.0 V mA Von/off Ion/off -- -- -- -- -- -- 5 15 50 10 V A ms -- -- -- -- 90 -- -- -- -- 0.7 110 20 V %VO, nom % IO, max VO, clamp 4.0 4.5 5.0 V Tyco Electronics Corp. FW150F Power Module: dc-dc Converter; 36 to 72 Vdc Input, 3.3 Vdc Output; 99 W Data Sheet September 1997 Characteristic Curves The following figures provide typical characteristics for the FW150F Power Module. 78 4.0 77 IO = 30 A (%) 3.0 76 VI = 36 V 75 2.5 EFFICIENCY, INPUT CURRENT, II (A) 3.5 2.0 IO = 15 A 1.5 1.0 74 VI = 54 V 73 72 VI = 72 V 71 0.5 70 0.0 0 10 20 30 40 50 60 70 80 INPUT VOLTAGE, VI (V) 0 5 10 15 20 25 30 OUTPUT CURRENT, IO (A) 8-1489 (C) Figure 1. Typical FW150F Input Characteristics at Room Temperature 8-1486 (C) Figure 3. Typical FW150F Efficiency vs. Output Current at Room Temperature 3.5 OUTPUT VOLTAGE, VO (V) 3.0 2.5 2.0 1.5 1.0 0.5 0.0 -0.5 0 5 10 15 20 25 30 35 40 OUTPUT CURRENT, IO (A) 8-1487 (C) Figure 2. Typical FW150F Output Characteristics at Room Temperature and 48 V Input Tyco Electronics Corp. Draft Copy Only 5 Lucent Technologies Inc.-- Proprietary Use pursuant to Company instructions FW150F Power Module: dc-dc Converter; 36 to 72 Vdc Input, 3.3 Vdc Output; 99 W Data Sheet September 1997 OUTPUT CURRENT, IO (A) (5 A/div) OUTPUT VOLTAGE, VO (V) (50 mV/div) OUTPUT VOLTAGE, VO (V) (50 mV/div) Characteristic Curves (continued) 3.35 3.29 25 20 15 10 5 TIME, t (1 s/div) TIME, t (200 s/div) 8-1506 (C) 8-1505 (C) Figure 6. Typical FW150F Transient Response to Step Increase in Load from 50% to 75% of Full Load at Room Temperature and 48 V Input (Waveform Averaged to Eliminate Ripple Component.) OUTPUT CURRENT, IO (A) (2 A/div) OUTPUT VOLTAGE, VO (V) (50 mV/div) Figure 4. Typical FW150F Output Ripple Voltage at Room Temperature, 48 V Input, and 30 A Output 17.5 12.5 7.5 2.5 TIME, t (200 s/div) 8-1504 (C) Figure 5. Typical FW150F Transient Response to Step Decrease in Load from 50% to 25% of Full Load at Room Temperature and 48 V Input (Waveform Averaged to Eliminate Ripple Component.) 6 8-XXXX (C) Figure 7. Typical FW150F Start-Up Transient at Room Temperature, 48 V Input, and 30 A Output Tyco Electronics Corp. Draft Copy Only Lucent Technologies Inc.-- Proprietary Use pursuant to Company instructions FW150F Power Module: dc-dc Converter; 36 to 72 Vdc Input, 3.3 Vdc Output; 99 W Data Sheet September 1997 Test Configurations Design Considerations Input Source Impedance TO OSCILLOSCOPE CURRENT PROBE LTEST V I (+) 12 H CS 220 F ESR < 0.1 33 F @ 20 C, 100 kHz ESR < 0.7 @ 100 kHz BATTERY V I (-) 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 8, a 33 F electrolytic capacitor (ESR < 0.7 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. 8-203 (C).l Note: Measure input reflected-ripple current with a simulated source inductance (LTEST) of 12 H. Capacitor CS offsets possible battery impedance. Measure current as shown above. Figure 8. Input Reflected-Ripple Test Setup PARALLEL SENSE(+) SENSE(-) SUPPLY II VI(+) VO(+) VI(-) VO(-) IO LOAD CONTACT AND DISTRIBUTION LOSSES CONTACT RESISTANCE 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, and EN60950. For the converter output to be considered meeting the requirements of safety extra-low voltage (SELV), one of the following must be true: All inputs are SELV and floating, with the output also floating. All inputs are SELV and grounded, with the output also grounded. Any non-SELV input must be provided with reinforced insulation from any other hazardous voltages, including the ac mains, and must have a SELV reliability test performed on it in combination with the converters. Inputs must meet SELV requirements. 8-683 (C).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. [VO(+) - VO(-)]IO = -------------------------------------------------- x 100 [VI(+) - VI(-)]II If the input meets extra-low voltage (ELV) requirements, then the converter's output is considered ELV. Figure 9. Output Voltage and Efficiency Measurement Test Setup The input to these units is to be provided with a maximum 20 A normal-blow fuse in the ungrounded lead. COPPER STRIP V O (+) Electrical Descriptions 0.1 F SCOPE RESISTIVE LOAD Current Limit V O (-) 8-513 (C) Note: Use a 0.1 F ceramic capacitor. Scope measurement should be made using a BNC socket. Position the load between 50 mm (2 in.) and 80 mm (3 in.) from the module. Figure 10. Peak-to-Peak Output Noise Measurement Test Setup Tyco Electronics Corp. To provide protection in a fault (output overload) condition, 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 output 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. 7 Data Sheet September 1997 FW150F Power Module: dc-dc Converter; 36 to 72 Vdc Input, 3.3 Vdc Output; 99 W Feature Descriptions PARALLEL Remote On/Off SENSE(+) 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 11). A logic low is Von/off = 0 V to 1.2 V, during which the module is on. 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 18 V. The maximum allowable leakage current of the switch at Von/off = 18 V is 50 A. If not using the remote on/off feature, short the ON/OFF pin to VI(-). SENSE(-) SUPPLY VI(+) VO(+) VI(-) VO(-) IO II CONTACT RESISTANCE LOAD CONTACT AND DISTRIBUTION LOSSES 8-651 (C).e Figure 12. Effective Circuit Configuration for Single-Module Remote-Sense Operation Output Voltage Set-Point Adjustment (Trim) When not using the trim feature, leave the TRIM pin open. Adjustment with TRIM Pin PARALLEL Output voltage adjustment allows the output voltage set point to be increased or decreased by adjusting an external resistor connected between the TRIM pin and either the SENSE(+) or SENSE(-) pins (see Figure 13 and Figure 14). SENSE(+) CASE SENSE(-) Ion/off ON/OFF + Von/off - VO(+) Connecting the external resistor (Rtrim-up) between the TRIM and SENSE(-) pins (VO, adj) increases the output voltage set point as defined in the following equation: VI(+) VO(-) VI(-) 8-580 (C).b Figure 11. Remote On/Off Implementation Remote Sense Remote sense minimizes the effects of distribution losses by regulating the voltage at the remote-sense connections. For single-unit operation, the PARALLEL pin should be connected to SENSE(-). 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(-)] 0.7 V The voltage between the VO(+) and VO(-) terminals must not exceed 4.0 V. This limit includes any increase in voltage due to remote-sense compensation and output voltage set-point adjustment (trim), see Figure 12. 1.25 x 5.620 R trim-up = --------------------------------- k VO, adj - 5.2 Connecting the external resistor (Rtrim-down) between the TRIM and SENSE(+) pins (VO, adj) decreases the output voltage set point as defined in the following equation: ( V O, adj - 1.25 ) x 5.620 R trim-down = ----------------------------------------------------------5.2 - V O, adj k The combination of the output voltage adjustment range and the output voltage sense range given in the Feature Specifications table cannot exceed 4.0 V between the VO(+) and VO(-) terminals. This limit includes any increase in voltage due to remote-sense compensation and output voltage set-point adjustment (trim), see Figure 12. If not using the remote-sense feature to regulate the output at the point of load, connect SENSE(+) to VO(+) and SENSE(-) to VO(-) at the module. 8 Tyco Electronics Corp. Data Sheet September 1997 FW150F Power Module: dc-dc Converter; 36 to 72 Vdc Input, 3.3 Vdc Output; 99 W Feature Descriptions (continued) Forced Load Sharing (Parallel Operation) Output Voltage Set-Point Adjustment (Trim) (continued) For either redundant operation or additional power requirements, the power modules can be configured for parallel operation with forced load sharing (see Figure 16). For a typical redundant configuration, Schottky diodes or an equivalent should be used to protect against short-circuit conditions. Because of the remote sense, the forward-voltage drops across the Schottky diodes do not affect the set point of the voltage applied to the load. For additional power requirements, where multiple units are used to develop combined power in excess of the rated maximum, the Schottky diodes are not needed. Rtrim-up TRIM PARALLEL SENSE(+) SENSE(-) SUPPLY VI(+) VO(+) VI(-) VO(-) IO II CONTACT RESISTANCE LOAD CONTACT AND DISTRIBUTION LOSSES 8-717 (C).c Figure 13. Circuit Configuration to Trim Up Output Voltage Good layout techniques should be observed for noise immunity. To implement forced load sharing, the following connections must be made: The parallel pins of all units must be connected together. The paths of these connections should be as direct as possible. All remote-sense pins should be connected to the power bus at the same point, i.e., connect all SENSE(+) pins to the (+) side of the power bus at the same point and all SENSE(-) pins to the (-) side of the power bus at the same point. Close proximity and directness are necessary for good noise immunity. Rtrim-down TRIM PARALLEL SENSE(+) SENSE(-) VI(+) SUPPLY VO(+) IO II VI(-) LOAD VO(-) CONTACT AND DISTRIBUTION LOSSES CONTACT RESISTANCE 8-718 (C).c Figure 14. Circuit Configuration to Trim Down Output Voltage Adjustment Without TRIM Pin The output voltage can be adjusted by placing an external resistor (Radj) between the SENSE(+) and VO(+) terminals (see Figure 15). By adjusting Radj, the output voltage can be increased by 10% of the nominal output voltage. The equation below shows the resistance required to obtain the desired output voltage. Radj = (VO, adj - VO, nom) 944.3 When not using the parallel feature, short the PARALLEL pin to SENSE(-). PARALLEL SENSE(+) SENSE(-) CASE VO(+) ON/OFF VI(+) VO(-) VI(-) PARALLEL SENSE(+) SENSE(-) CASE PARALLEL VO(+) ON/OFF VI(+) VO(-) VI(-) Radj SENSE(+) SENSE(-) 8-581 (C) SUPPLY VI(+) VO(+) VI(-) VO(-) IO II CONTACT RESISTANCE Figure 16. Wiring Configuration for Redundant Parallel Operation LOAD CONTACT AND DISTRIBUTION LOSSES 8-710 (C).c Figure 15. Circuit Configuration to Adjust Output Voltage Tyco Electronics Corp. 9 Data Sheet September 1997 FW150F Power Module: dc-dc Converter; 36 to 72 Vdc Input, 3.3 Vdc Output; 99 W Feature Descriptions (continued) Heat Transfer Without Heat Sinks Output Overvoltage Clamp Derating curves for forced-air cooling without a heat sink are shown in Figure 18. These curves can be used to determine the appropriate airflow for a given set of operating conditions. For example, if the unit dissipates 20 W of heat, the correct airflow in a 40 C environment is 1.0 m/s (200 ft./min.). 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 occurs at the position indicated in Figure 17. MEASURE CASE TEMPERATURE HERE 76 (3.0) Lucent 18 (0.7) TRIM PARALLEL FW150F9 DC-DC Power Module CASE ON/OFF + IN - + SENSE - IN:DC 48V, 2.9A OUT:DC 3.3V, 30A 99W - OUT MADE IN USA 6238 TUV Rheinland + Protected by U.S. Patents: 5,036,452 5,179,365 8-582 (C).c Note: Top view, measurements shown in millimeters and (inches). Figure 17. Case Temperature Measurement Location The temperature at this location should not exceed 95 C. The maximum case temperature can be limited to a lower value for extremely high reliability. The output power of the module should not exceed the rated power for the module as listed in the Ordering Information table. 40 POWER DISSIPATION, PD (W) 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-control that reduces the risk of output overvoltage. 0.5 m/s (100 ft./min.) 1.0 m/s (200 ft./min.) 1.5 m/s (300 ft./min.) 2.0 m/s (400 ft./min.) 2.5 m/s (500 ft./min.) 3.0 m/s (600 ft./min.) 3.5 m/s (700 ft./min.) 4.0 m/s (800 ft./min.) 30 20 10 0.1 m/s (20 ft./min.) NATURAL CONVECTION 0 0 20 40 60 80 100 LOCAL AMBIENT TEMPERATURE, TA (C) 8-587 (C) Figure 18. Power Derating vs. Local Ambient Temperature and Air Velocity Heat Transfer with Heat Sinks The power modules have threaded #4-40 fasteners, which enable heat sinks or cold plates to be attached 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 (ca) is defined as the maximum case temperature rise (TC, max) divided by the module power dissipation (PD): T C, max (TC - TA) ca = --------------------= -----------------------PD PD The location to measure case temperature (TC) is shown in Figure 17. Case-to-ambient thermal resistance vs. airflow for various heat sink configurations is shown in Figure 19 and Figure 20. These curves were obtained by experimental testing of heat sinks, which are offered in the product catalog. For additional information about these modules, refer to the Thermal Management for High-Power BoardMounted Power Modules Technical Note (TN97-009EPS). 10 Tyco Electronics Corp. Data Sheet September 1997 FW150F Power Module: dc-dc Converter; 36 to 72 Vdc Input, 3.3 Vdc Output; 99 W POWER DISSIPATION, PD (W) Thermal Considerations (continued) THERMAL RESISTANCE, (C/W) Heat Transfer with Heat Sinks (continued) 5.0 NO HEAT SINK 4.0 0.25 in. HEAT SINK 0.5 in. HEAT SINK 3.0 1 in. HEAT SINK 2.0 40 35 VI = 36 V 30 VI = 54 V 25 VI = 72 V 20 15 10 5 0 0 5 1.0 0.0 NAT CONV 10 15 20 25 30 OUTPUT CURRENT, IO (A) 8-924 (C) 0.5 (100) 1.0 (200) 1.5 (300) 2.0 (400) 2.5 (500) Figure 21. Power Dissipation as Heat vs. Output Current AIR VELOCITY MEASURED IN m/s (ft./min.) 8-696 (C).a THERMAL RESISTANCE, (C/W) Figure 19. Heat Sink Resistance Curves; Fins Oriented Along Width If an 85 C case temperature is desired, what is the minimum airflow necessary? Assume the FW150F module is operating at nominal line and an output current of 20 A, maximum ambient air temperature of 40 C, and the heat sink is 0.5 inch. 5.0 NO HEAT SINK 4.0 0.25 in. HEAT SINK 3.0 0.5 in. HEAT SINK Solution 1 in. HEAT SINK Given: VI = 54 V IO = 20 A TA = 40 C TC = 85 C Heat sink = 0.5 inch. 2.0 1.0 0.0 NAT CONV Example 0.5 (100) 1.0 (200) 1.5 (300) 2.0 (400) 2.5 (500) Determine PD by using Figure 21: PD = 20 W AIR VELOCITY MEASURED IN m/s (ft./min.) 8-697 (C).a Then solve the following equation: Figure 20. Heat Sink Resistance Curves; Fins Oriented Along Length 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 19 and Figure 20 had a thermal-conductive dry pad between the case and the heat sink to minimize contact resistance. To choose a heat sink, determine the power dissipated as heat by the unit for the particular application. Figure 21 shows typical heat dissipation for a range of output currents and three voltages for the FW150F. Tyco Electronics Corp. TC - TA) ca = (----------------------PD 85 - 40 ) ca = (----------------------20 - ca = 2.25 C/W Use Figure 19 and Figure 20 to determine air velocity for the 0.5 inch heat sink. The minimum airflow necessary for the FW150F module depends on heat sink fin orientation and is shown below: 0.25 m/s (50 ft./min.) (oriented along width) 0.30 m/s (60 ft./min.) (oriented along length) 11 FW150F Power Module: dc-dc Converter; 36 to 72 Vdc Input, 3.3 Vdc Output; 99 W Thermal Considerations (continued) For a managed interface using thermal grease or foils, a value of cs = 0.1 C/W to 0.3 C/W is typical. The solution for heat sink resistance is: 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 (cs) and sink-to-ambient (sa) shown below (Figure 22): PD TC TS cs TA (TC - TA) sa = ------------------------ - cs PD 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. sa 8-1304 (C) Figure 22. Resistance from Case-to-Sink and Sinkto-Ambient 12 Data Sheet September 1997 Layout Considerations Copper paths must not be routed beneath the power module standoffs. Tyco Electronics Corp. Data Sheet September 1997 FW150F Power Module: dc-dc Converter; 36 to 72 Vdc Input, 3.3 Vdc Output; 99 W 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 5.3 (0.21) 121.9 (4.80) Lucent 52.83 (2.080) 63.5 (2.50) TRIM TRIM OPTION ONLY PARALLEL FW150F9 DC-DC Power Module CASE ON/OFF + IN - + SENSE - IN:DC 48V, 2.9A OUT:DC 3.3V, 30A 99W - OUT MADE IN USA 6238 + TUV Rheinland Protected by U.S. Patents: 5,036,452 5,179,365 5.3 (0.21) 55.63 (2.190) 55.63 (2.190) FOR OPTIONAL HEAT SINK MOUNTING #4-40 THD 4.6 (0.18) DEEP 6 PLCS Side View SIDE MARKING 1.0 (0.04) 12.7 (0.50) 4.1 (0.16) 1.57 (0.062) 0.05 (0.002) DIA TIN-PLATED BRASS TYP 12 PLCS 3.8 (0.15) TYP 8 PLCS Bottom View 4.3 (0.17) 5.08 (0.200) 10.16 (0.400) 113.54 (4.470) 12.2 (0.48) 20.32 (0.800) 25.40 (1.000) 30.48 (1.200) 35.56 (1.400) 15.24 (0.600) TRIM OPTION ONLY 8-719 (C).d Tyco Electronics Corp. 13 FW150F Power Module: dc-dc Converter; 36 to 72 Vdc Input, 3.3 Vdc Output; 99 W Data Sheet September 1997 Recommended Hole Pattern Component-side footprint. Dimensions are in millimeters and (inches). TRIM OPTION ONLY TRIM 15.24 (0.600) PARALLEL + SENSE - CASE 10.16 (0.400) - ON/OFF OUT + IN - 35.56 30.48 (1.400) 25.40 (1.200) 20.32 (1.000) (0.800) + 12.2 (0.48) 5.08 (0.200) 4.3 (0.17) 113.54 (4.470) 8-719 (C).d Ordering Information Please contact your Tyco Electronics Account Manager or Field Application Engineer for pricing and availability. Input Voltage 48 V 14 Output Voltage 3.3 V Output Power 99 W Trim Pin Yes Device Code FW150F9 Comcode 107050940 Tyco Electronics Corp. Data Sheet September 1997 FW150F Power Module: dc-dc Converter; 36 to 72 Vdc Input, 3.3 Vdc Output; 99 W Notes Tyco Electronics Corp. 15 FW150F Power Module: dc-dc Converter; 36 to 72 Vdc Input, 3.3 Vdc Output; 99 W Data Sheet September 1997 Tyco Electronics Power Systems, Inc. 3000 Skyline Drive, Mesquite, TX 75149, USA +1-800-526-7819 FAX: +1-888-315-5182 (Outside U.S.A.: +1-972-284-2626, FAX: +1-972-284-2900 http://power.tycoeleectronics.com Tyco Electronics Corportation 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. (c) 2001 Tyco Electronics Corporation, Harrisburg, PA. All International Rights Reserved. Printed in U.S.A. September 1997 DS96-209EPS (Replaces DS93-138EPS) Printed on Recycled Paper