Data Sheet March 26, 2008 JHC/JHW350 Series Power Modules; dc-dc Converter 18-36Vdc or 36-75Vdc Input; 28Vdc Output; 12.5A RoHS Compliant Features Compliant to RoHS EU Directive 2002/95/EC (-Z versions) Compliant to ROHS EU Directive 2002/95/EC with lead solder exemption (non-Z versions) High efficiency – 93.5% at 28V full load Industry standard pin-out Improved Thermal Performance: Full output power with case temperature (Tc) of 85°C High power density: 128 W/in3 Low output ripple and noise Industry standard Half brick: 57.9 mm x 61.0 mm x 12.7 mm (2.28 in x 2.4 in x 0.5 in) Applications Distributed power architectures Wireless Networks RF Amplifier Options Positive Remote On/Off logic Auto restart after fault shutdown Single tightly regulated output Remote sense 2:1 input voltage range Constant switching frequency Negative Remote On/Off logic Output over current/voltage protection Overtemperature protection Output voltage adjustment Wide operating temperature range (-40°C to 85°C) ISO** 9001 certified manufacturing facilities UL60950-1 Recognized, CSA† C22.2 No. 60950-103 Certified, and EN 60950-1 (VDE‡ 0805): 2001-12 Licensed CE mark meets 73/23/EEC and 93/68/EEC directives§ (JHW series only) Description The JHC/JHW-series dc-dc converters are a new generation of DC/DC power modules designed for maximum efficiency and power density. The JHC/JHW series provide up to 350W output power in an industry standard Halfbrick, which makes it an ideal choice for high voltage and high power applications. The converter incorporates synchronous rectification technology and innovative packaging techniques to achieve ultra high efficiency reaching 93.5% at 28V with full load. The 5-sided encapsulated case package allows for excellent thermal performance in strict thermal environment. Threaded-through holes are provided to allow easy mounting or addition of a heatsink for high-temperature applications. The JHC/JHW series power modules are isolated dc-dc converters that operate over a wide input voltage range of 18 to 36 Vdc or 36 to 75 Vdc respectively and provide single precisely regulated output. The output is fully isolated from the input, allowing versatile polarity configurations and grounding connections. Built-in filtering for both input and output minimizes the need for external filtering. * UL is a registered trademark of Underwriters Laboratories, Inc. † CSA is a registered trademark of Canadian Standards Association. VDE is a trademark of Verband Deutscher Elektrotechniker e.V. ** ISO is a registered trademark of the International Organization of Standards ‡ Document No: DS03-089 ver. 1.3 PDF name: jhc_jhw350_series.ds.pdf Data Sheet March 26, 2008 JHC/JHW350 Power Module; dc-dc Converter 18 – 36Vdc or 36 – 75Vdc Input; 28Vdc Output; 350W Absolute Maximum Ratings Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect the device reliability. Parameter Device Symbol Min Max Unit Input Voltage JHC VIN -0.3 40 Vdc Continuous JHW VIN -0.3 80 Vdc Transient (100ms) JHC VIN, trans -0.3 50 Vdc Transient (100ms) JHW VIN, trans -0.3 100 Vdc All Tc -40 100 °C Storage Temperature All Tstg -55 125 °C I/O Isolation Voltage All ⎯ ⎯ 1500 Vdc Operating Ambient Temperature (See Thermal Considerations section) Electrical Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. Parameter Operating Input Voltage Device Symbol Min Typ Max Unit JHC VIN 18 24 36 Vdc JHW VIN 36 48 75 Vdc Maximum Input Current JHC IIN,max 23 Adc (VIN=0V to 36V, IO=IO, max)/(VIN=0V to 75V, IO=IO, max) JHW IIN,max 11 Adc Inrush Transient All 2 2 As Input Reflected Ripple Current, peak-to-peak (5Hz to 20MHz, 12μH source impedance; VIN=0V to 75V, IO= IOmax ; see Figure 13) All 7 15 mAp-p Input Ripple Rejection (120Hz) All 60 It 2 dB Fusing Considerations CAUTION: This power module is not internally fused. An input line fuse must always be used. This power module can be used in a wide variety of applications, ranging from simple standalone operation to 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 fast-acting fuse with a maximum rating of 20A for JHW series and 30A for JHC series(see Safety Considerations section). Based on the information provided in this data sheet on inrush energy and maximum dc input current, the same type of fuse with a lower rating can be used. Refer to the fuse manufacturer’s data sheet for further information. LINEAGE POWER. 2 Data Sheet March 26, 2008 JHC/JHW350 Power Module; dc-dc Converter 18 – 36Vdc or 36 – 75Vdc Input; 28Vdc Output; 350W Electrical Specifications (continued) Parameter Output Voltage Set-point (VIN=VIN,nom, IO=IO, max, Tc =25°C) Output Voltage (Over all operating input voltage, resistive load, and temperature conditions until end of life) Device R R Symbol Min Typ Max Unit VO, set 27.5 28 28.5 Vdc VO 27.16 ⎯ 28.84 Vdc Output Regulation Line (VIN=VIN, min to VIN, max) All ⎯ 0.02 0.1 %Vo Load (IO=IO, min to IO, max) All ⎯ 0.05 0.2 %Vo Temperature (Tc = -40°C to +100°C) All ⎯ 100 300 mV RMS (5Hz to 20MHz bandwidth) All ⎯ 27 40 mVrms Peak-to-Peak (5Hz to 20MHz bandwidth) All ⎯ 45 150 mVpk-pk ⎯ 3600 μF 12.5 Adc ⎯ Adc Output Ripple and Noise on nominal output (VIN=VIN, nom and IO=IO, min to IO, max, CO=CO,min) External Capacitance (type electrolytic) All CO, max 1000 Output Current R Io 0 Output Current Limit Inception R IO, lim ⎯ JHC350R 13.5 92.5 Efficiency VIN=VIN, nom, Tc=25°C IO=IO, max , VO= VO,set JHW350R Switching Frequency All fsw ⎯ 350 ⎯ kHz All Vpk ⎯ 2 ⎯ %VO, set All ts __ 500 __ μs All Vpk __ 2 __ %VO, set All ts ⎯ 500 ⎯ μs η ⎯ η 93.5 ⎯ % % Dynamic Load Response (ΔIo/Δt=1A/10μs; Vin=Vin,nom; Tc=25°C; Tested with a 330 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% peak deviation) Load Change from Io= 75% to 50% of Io,max: Peak Deviation Settling Time (Vo<10% peak deviation) LINEAGE POWER 3 Data Sheet March 26, 2008 JHC/JHW350 Power Module; dc-dc Converter 18 – 36Vdc or 36 – 75Vdc Input; 28Vdc Output; 350W Isolation Specifications Parameter Symbol Min Typ Max Unit Isolation Capacitance Ciso ⎯ 440 ⎯ pF Isolation Resistance Riso 10 ⎯ ⎯ MΩ General Specifications Parameter Calculated MTBF (IO=80% of IO, max, Tc =40°C, airflow=1m/s(200LFM)) Weight LINEAGE POWER. Device Min All Typ Max Hours 2,179,312 ⎯ 112 (3.95) Unit ⎯ g (oz.) 4 Data Sheet March 26, 2008 JHC/JHW350 Power Module; dc-dc Converter 18 – 36Vdc or 36 – 75Vdc Input; 28Vdc Output; 350W Feature Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See Feature Descriptions for additional information. Parameter Device Symbol Min Typ Max Unit All Ion/off ⎯ 0.15 1.0 mA All Von/off 0.0 ⎯ 0.5 V Logic High – (Typ = Open Collector) All Von/off ⎯ __ 5 V Logic High maximum allowable leakage current All Ion/off ⎯ ⎯ 50 μA Tdelay = Time until VO = 10% of VO,set from either application of Vin with Remote On/Off set to On or operation of Remote On/Off from Off to On with Vin already applied for at least one second. R Tdelay ⎯ 40 ⎯ ms Trise = time for VO to rise from 10% of VO,set to 90% of VO,set. All Trise ⎯ 50 ⎯ ms Output Voltage Adjustment (See Feature Descriptions) Output Voltage Set-point Adjustment Range (trim) All Vtrim 90 __ 110 %VO, nom Output Voltage Remote-sense Range (See Feature Descriptions) All Vsense __ __ 5 %VO, nom Output Overvoltage Protection R VO, limit 31 __ 38 V All Tref ⎯ 110 ⎯ °C 17.5 18 V Remote On/Off Signal Interface (VIN=VIN, min to VIN, max ; open collector or equivalent, Signal referenced to VIN- terminal) Negative Logic: device code suffix “1” Logic Low = module On, Logic High = module Off Positive Logic: No device code suffix required Logic Low = module Off, Logic High = module On Logic Low Specification Remote On/Off Current – Logic Low On/Off Voltage: Logic Low Turn-On Delay and Rise Times (IO=IO, max) Overtemperature Protection (See Feature Descriptions) Input Undervoltage Lockout LINEAGE POWER VIN, UVLO Turn-on Threshold JHC350R Turn-off Threshold JHC350R 15.5 16.5 V Hysteresis JHC350R Turn-on Threshold JHW350R ⎯ 35 1 36 V V Turn-off Threshold JHW350R 31 33 ⎯ V Hysteresis JHW350R --- 2 --- V 5 Data Sheet March 26, 2008 JHC/JHW350 Power Module; dc-dc Converter 18 – 36Vdc or 36 – 75Vdc Input; 28Vdc Output; 350W Characteristic Curves 6 Io = 6.5A 4 Io = 0A 0 65 75 INPUT VOLTAGE, VO (V) EFFICIENCY, η (%) Figure 1. Typical Input Characteristic at Room Temperature. 96 94 92 90 88 86 84 82 80 78 76 74 72 70 Figure 4. Typical Start-Up Using Remote On/Off, negative logic, Co,ext = 330µF. V i = 36V V i = 48V V i = 75V 0 1 2 3 4 5 6 7 8 9 10 11 12 OUTPUT CURRENT, IO (A) Figure 2. Typical Converter Efficiency Vs. Output current at Room Temperature. VO (V) (50mV/div) OUTPUT VOLTAGE, 13 TIME, t (200 μs /div) Figure 5. Typical Transient Response to Step Decrease in Load from 50% to 25% of Full Load at Room Temperature and 52 Vdc Input; Co,ext = 330µF. 75 Vin 48 Vin 36 Vin TIME, t (1μs/div) Figure 3. Typical Output Ripple and Noise at Room Temperature, Io = Io,max, Co,ext = Co,min = 330µF. LINEAGE POWER. TIME, t (10 ms/div) VIN(V) (20V/div) 55 IO (A) (5A/div) 45 OUTPUT CURRENT INPUT VOLTAGE 35 VO (V) (500mV/div) 25 IO (A) (5A/div) 2 VON/OFF(V) (2V/div) Io = 12.5A 8 VO (V) (10V/div) 10 OUTPUT CURRENT, OUTPUT VOLTAGE INPUT CURRENT, IIN (A) 12 OUTPUT VOLTAGE, On/Off VOLTAGE The following figures provide typical characteristics for the JHW350R (28V, 12.5A) at 25°C. The figures are identical for either positive or negative Remote On/Off logic. TIME, t (200μs /div) Figure 6. Typical Transient Response to Step Increase in Load from 50% to 75% of Full Load at Room Temperature and 52 Vdc Input; Co,ext = 330µF. 6 Data Sheet March 26, 2008 JHC/JHW350 Power Module; dc-dc Converter 18 – 36Vdc or 36 – 75Vdc Input; 28Vdc Output; 350W Characteristic Curves Io = 6.5A 5 Io = 0A 0 22 24 26 28 30 32 34 36 INPUT VOLTAGE, VO (V) EFFICIENCY, η (%) Figure 7. Typical Input Characteristic at Room Temperature. 94 92 90 88 86 84 82 80 78 76 74 72 70 Figure 10. Typical Start-Up Using Remote On/Off, negative logic, Co,ext = 330µF. V i = 18V V i = 24V V i = 36V 0 1 2 3 4 5 6 7 8 9 10 11 12 OUTPUT CURRENT, IO (A) Figure 8. Typical Converter Efficiency Vs. Output current at Room Temperature. VO (V) (50mV/div) OUTPUT VOLTAGE, 13 TIME, t (500 μs /div) Figure 11. Typical Transient Response to Step Decrease in Load from 75% to 50% of Full Load at Room Temperature and 24 Vdc Input; Co,ext = 330µF. 36 Vin 24 Vin 18 Vin TIME, t (1μs/div) Figure 9. Typical Output Ripple and Noise at Room Temperature, Io = Io,max, Co,ext = Co,min = 330µF. LINEAGE POWER TIME, t (20 ms/div) VIN(V) (500mV/div) 20 VO (V) (10V/div) 18 OUTPUT VOLTAGE, INPUT VOLTAGE 16 VO (V) (500mV/div) 14 IO (A) (5A/div) 10 VON/OFF(V) (5V/div) Io = 12.5A 15 VO (V) (10V/div) 20 OUTPUT CURRENT, OUTPUT VOLTAGE INPUT CURRENT, IIN (A) 25 OUTPUT VOLTAGE, On/Off VOLTAGE The following figures provide typical characteristics for the JHC350R (28V, 12.5A) at 25°C. The figures are identical for either positive or negative Remote On/Off logic. TIME, t (500μs /div) Figure 12. Typical Transient Response to Step Increase in Load from 50% to 75% of Full Load at Room Temperature and 24 Vdc Input; Co,ext = 330µF. 7 Data Sheet March 26, 2008 JHC/JHW350 Power Module; dc-dc Converter 18 – 36Vdc or 36 – 75Vdc Input; 28Vdc Output; 350W Test Configurations Design Considerations Input Source Impedance The power module should be connected to a low ac-impedance source. Highly inductive source impedance can affect the stability of the power module. For the test configuration in Figure 13, a 200μF electrolytic capacitor (ESR<0.7Ω at 100kHz), mounted close to the power module helps ensure the stability of the unit. Consult the factory for further application guidelines. Output Capacitance 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 13. Input Reflected Ripple Current Test Setup. Output capacitance and load impedance interact with the power module’s output voltage regulation control system and may produce an ’unstable’ output condition for the required values of capacitance and E.S.R.. Minimum and maximum values of output capacitance and of the capacitor’s associated E.S.R. may be dictated, depending on the module’s control system. This series power module requires minimum of 330µF output capacitance placed near output pins to ensure stable operation in full range of load/line conditions. The process of determining the acceptable values of capacitance and E.S.R. is complex and is loaddependant. Lineage Power provides Web-based tools to assist the power module end-user in appraising and adjusting the effect of various load conditions and output capacitances on specific power modules for various load conditions. Note: Use a 1.0 µF ceramic capacitor and a 1000µF 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. Figure 14. Output Ripple and Noise Test Setup. 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. Figure 15. Output Voltage and Efficiency Test Setup. LINEAGE POWER. 8 Data Sheet March 26, 2008 JHC/JHW350 Power Module; dc-dc Converter 18 – 36Vdc or 36 – 75Vdc Input; 28Vdc Output; 350W Safety Considerations All Versions - 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., UL60950, CSA C22.2 No. 60950-00, and EN 60950 (VDE 0805):2001-12. “W” Versions only - For end products connected to – 48V dc, or –60Vdc nominal DC MAINS (i.e. central office dc battery plant), no further fault testing is required. *Note: -60V dc nominal battery plants are not available in the U.S. or Canada. All Versions - For all input voltages, other than DC MAINS, where the input voltage is less than 60V dc, if the input meets all of the requirements for SELV, then: The output may be considered SELV. Output voltages will remain within SELV limits even with internally-generated non-SELV voltages. Single component failure and fault tests were performed in the power converters. One pole of the input and one pole of the output are to be grounded, or both circuits are to be kept floating, to maintain the output voltage to ground voltage within ELV or SELV limits. “W” Versions only - For all input sources, other than DC MAINS, where the input voltage is between 60 and 75V dc (Classified as TNV-2 in Europe), the following must be meet, if the converter’s output is to be evaluated for SELV: The input source is to be provided with reinforced insulation from any hazardous voltage, including the ac mains. One Vi pin and one Vo pin are to be reliably earthed, or both the input and output pins are to be kept floating. 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. fast-acting (or time-delay) fuse in the unearthed lead for their respective versions. Feature Descriptions Overcurrent Protection To provide protection in a fault output overload condition, the module is equipped with internal current-limiting circuitry and can endure current limit for few seconds. If overcurrent persists for few seconds, the module will shut down and remain latchoff. The overcurrent latch is reset by either cycling the input power or by toggling the on/off pin for one second. If the output overload condition still exists when the module restarts, it will shut down again. This operation will continue indefinitely until the overcurrent condition is corrected. An auto-restart option is also available. 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 (Von/off) and the VI (-) terminal. The switch can be an open collector or equivalent (see Figure 16). A logic low is Von/off = 0 V to 0.5 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 5 V. The maximum allowable leakage current of the switch at Von/off = 5V is 50 µA. If not using the remote on/off feature, perform one of the following to turn the unit on: For negative logic, short ON/OFF pin to VIN(-). For positive logic: leave ON/OFF pin open. All Versions - The power module has ELV (extra-low voltage) outputs when all inputs are ELV. All flammable materials used in the manufacturing of these modules are rated 94V-0. Figure 16. Remote On/Off Implementation. The input to these units is to be provided with a maximum 20A (JHW series) and 30A (JHC series) LINEAGE POWER 9 Data Sheet March 26, 2008 JHC/JHW350 Power Module; dc-dc Converter 18 – 36Vdc or 36 – 75Vdc Input; 28Vdc Output; 350W Feature Descriptions (continued) 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(-)] ≤5% of Vo,nom. The voltage between the Vo(+) and Vo(-) terminals must not exceed the minimum output overvoltage shut-down value indicated in the Feature Specifications table. This limit includes any increase in voltage due to remote-sense compensation and output voltage set-point adjustment (trim). See Figure 17. If not using the remote-sense feature to regulate the output at the point of load, then connect SENSE(+) to Vo(+) and SENSE(-) to Vo(-) at the module. Although the output voltage can be increased by both the remote sense and by the trim, the maximum increase for the output voltage is not the sum of both. The maximum increase is the larger of either the remote sense or the trim. The amount of power delivered by the module is defined as the 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. With an external resistor between the TRIM and SENSE(-) pins (Radj-down), the output voltage set point (Vo,adj) decreases (see Figure 18). The following equation determines the required externalresistor value to obtain a percentage output voltage change of Δ%. For output voltages: 28V ⎛ 100 ⎞ Radj − down = ⎜ − 2 ⎟ KΩ ⎝ Δ% ⎠ Where, Δ% = Vo , nom − Vdesired × 100 Vo , nom Vdesired = Desired output voltage set point (V). With an external resistor connected between the TRIM and SENSE(+) pins (Radj-up), the output voltage set point (Vo,adj) increases (see Figure 19). The following equation determines the required external-resistor value to obtain a percentage output voltage change of Δ%. For output voltages: 28V ⎛ Vo , nom * (100 + Δ % ) (100 + 2Δ %) ⎞ Radj − up = ⎜ − ⎟ KΩ Δ% 1.225 * Δ % ⎝ ⎠ Where, Δ% = Vdesired − Vo , nom × 100 Vo , nom Vdesired = Desired output voltage set point (V). Figure 17. Effective Circuit Configuration for Single-Module Remote-Sense Operation Output Voltage. Output Voltage Set-Point Adjustment (Trim) Trimming 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. LINEAGE POWER. The voltage between the Vo(+) and Vo(-) terminals must not exceed the minimum output overvoltage shut-down value indicated in the Feature Specifications table. This limit includes any increase in voltage due to remote-sense compensation and output voltage set-point adjustment (trim). See Figure 17. Although the output voltage can be increased by both the remote sense and by the trim, the maximum increase for the output voltage is not the sum of both. The maximum increase is the larger of either the remote sense or the trim. The amount of power delivered by the module is defined as the 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 10 Data Sheet March 26, 2008 JHC/JHW350 Power Module; dc-dc Converter 18 – 36Vdc or 36 – 75Vdc Input; 28Vdc Output; 350W Feature Descriptions (continued) the module remains at or below the maximum rated power. ⎛ 28 * (100 + 5) (100 + 2 * 5) ⎞ − Radj − up = ⎜ ⎟ KΩ 5 ⎝ 1.225 * 5 ⎠ Rtadj-up = 458kΩ 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 over voltage protection threshold, then the module will shutdown and latch off. The latch is reset by either cycling the input power for one second or by toggling the on/off signal for one second. The protection mechanism is such that the unit can continue in this condition until the fault is cleared. Figure 18. Circuit Configuration to Decrease Output Voltage. Overtemperature Protection These modules feature an overtemperature protection circuit to safeguard against thermal damage. The circuit shuts down the module when the maximum case reference temperature is exceeded. The module will restart automatically when the case temperature cools below the overtemperature shutdown threshold. Input Undervoltage Lockout At input voltages below the input undervoltage lockout limit, the module operation is disabled. The module will begin to operate at an input voltage above the undervoltage lockout turn-on threshold. Figure 19. Circuit Configuration to Increase Output Voltage. Examples: To trim down the output of a nominal 28V module (JHW350R) to 26.6V Δ% = 28V − 26.6V × 100 28V ∆% = 5 ⎛ 100 ⎞ Radj − down = ⎜ − 2 ⎟ KΩ ⎝ 5 ⎠ Radj-down = 18 kΩ To trim up the output of a nominal 28V module (JHW350R) to 29.4V Δ% = 28V − 29.4V × 100 28V Δ% = 5 LINEAGE POWER 11 Data Sheet March 26, 2008 JHC/JHW350 Power Module; dc-dc Converter 18 – 36Vdc or 36 – 75Vdc Input; 28Vdc Output; 350W Thermal Considerations The power modules operate in a variety of thermal environments; however, sufficient cooling should be provided to help ensure reliable operation of the unit. Heat-dissipating components inside the unit are thermally coupled to the case. Heat is removed by conduction, convection, and radiation to the surrounding environment. Proper cooling can be verified by measuring the case temperature. Peak temperature (TC) occurs at the position indicated in Figure 20. Considerations include ambient temperature, airflow, module power dissipation, and the need for increased reliability. A reduction in the operating temperature of the module will result in an increase in reliability. The thermal data presented here is based on physical measurements taken in a wind tunnel. For reliable operation this temperature should not exceed 100ºC threshold. versus local ambient temperature (TA) for natural convection through 2m/s (400 ft./min). Note that the natural convection condition was measured at 0.05 m/s to 0.1 m/s (10ft./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 21 is shown in the following example: Example What is the minimum case temperature must be maintained to operate a JHW350R at Vin = 48 V, an output power of 300W in longitudinal orientation. Solution: Given: VI = 48V Po = 300W Determine case temperature (Use Figure 21): TC = 92 °C MEASURE CASE TEMPERATURE HERE (Tc) ON/OFF VO(+) + SEN TRIM 30.5 (1.20) CASE VI(-) - SEN VO(-) 29.0 (1.14) Figure 20. Metal Case (Tc ) Temperature Measurement Location (top view). OUTPUT POWER (W) VI(+) 400 350 300 250 200 150 100 50 20 30 40 50 60 70 80 90 100 110 CASE TEMPERATURE, TC (°C) Figure 21. Output Power Derating for JHC/JHW350R (Vo = 28V) in Longitudinal Orientation; Airflow Direction From Vin(–) to Vout(--); Vin = Vin, nom 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 Tc temperature of the power modules is 100 °C, you can limit this temperature to a lower value for extremely high reliability. Please refer to the Application Note “Thermal Characterization Process For Open-Frame BoardMounted Power Modules” for a detailed discussion of thermal aspects including maximum device temperatures. Heat Transfer via Convection Increased airflow over the module enhances the heat transfer via convection. Following derating figures shows the maximum output power that can be delivered by each module in the respective orientation without exceeding the maximum TC temperature LINEAGE POWER. 12 Data Sheet March 26, 2008 JHC/JHW350 Power Module; dc-dc Converter 18 – 36Vdc or 36 – 75Vdc Input; 28Vdc Output; 350W Layout Considerations The JHC/JHW power module series are encapsulated aluminum case packaged style, as such; component clearance between the bottom of the power module and the mounting (Host) board is limited. Avoid placing copper areas on the outer layer directly underneath the power module. Also avoid placing via interconnects underneath the power module. For additional layout guide-lines, refer to FLTR100V20 data sheet. Post Solder Cleaning and Drying Considerations Post solder cleaning is usually the final circuit-board assembly process prior to electrical board testing. The result of inadequate 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 Lineage Power Board Mounted Power Modules: Soldering and Cleaning Application Note (AP01-056EPS). Through-Hole Lead-Free Soldering Information The RoHS-compliant through-hole products use the SAC (Sn/Ag/Cu) Pb-free solder and RoHS-compliant components. They are designed to be processed through single or dual wave soldering machines. The pins have an RoHS-compliant finish that is compatible with both Pb and Pb-free wave soldering processes. A maximum preheat rate of 3°C/s is suggested. The wave preheat process should be such that the temperature of the power module board is kept below 210°C. For Pb solder, the recommended pot temperature is 260°C, while the Pb-free solder pot is 270°C max. Not all RoHS-compliant through-hole products can be processed with paste-through-hole Pb or Pb-free reflow process. If additional information is needed, please consult with your Lineage Power representative for more details. LINEAGE POWER 13 Data Sheet March 26, 2008 JHC/JHW350 Power Module; dc-dc Converter 18 – 36Vdc or 36 – 75Vdc Input; 28Vdc Output; 350W Mechanical Outline for Through-hole Module Dimensions are in millimeters and (inches). Tolerances: x.x mm ± 0.5 mm ( x.xx in. ± 0.02 in.) [unless otherwise indicated] x.xx mm ± 0.25 mm ( x.xxx in ± 0.010 in.) 57.9 (2.28) TOP VIEW 61.0 (2.40) SIDE LABEL* 2.06 (0.081) DIA SOLDER-PLATED BRASS, 2 PLACES ( - OUTPUT AND + OUTPUT) 0.51 (0.020) SIDE VIEW 1.02 (0.040) DIA SOLDER-PLATED BRASS, 7 PLACES 5.08 (0.20) MIN 12.7 (0.50) STANDOFF, 4 PLACES 7.1 (0.28) 5.1 (0.20) 7.3 (0.29) BOTTOM VIEW 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) 4.7 (0.19) 48.3 (1.90) *Side label includes Lineage Power name, product designation, and data code. Option Feature, Pin is not present unless one these options specified LINEAGE POWER. 14 Data Sheet March 26, 2008 JHC/JHW350 Power Module; dc-dc Converter 18 – 36Vdc or 36 – 75Vdc Input; 28Vdc Output; 350W Recommended Pad Layout for Through-Hole Modules Dimensions are in millimeters and (inches). Tolerances: x.x mm ± 0.5 mm ( x.xx in. ± 0.02 in.) [unless otherwise indicated] x.xx mm ± 0.25 mm ( x.xxx in ± 0.010 in.) LINEAGE POWER 15 Data Sheet March 26, 2008 JHC/JHW350 Power Module; dc-dc Converter 18 – 36Vdc or 36 – 75Vdc Input; 28Vdc Output; 350W Ordering Information Please contact your Lineage Power Sales Representative for pricing, availability and optional features. Table 1. Device Codes Input Voltage Output Voltage Output Current Efficiency Connector Type 48V (36-75Vdc) 28V 12.5A 93.5% Through hole Product codes JHW350R1 Comcodes 108980749 48V (36-75Vdc) 28V 12.5A 93.5% Through hole JHW350R41 48V (36-75Vdc) 28V 12.5A 93.5% Through hole JHW350R41Z 108986548 24V (18-36Vdc) 28V 12.5A 92.5% Through hole JHC350R4 108987462 24V (18-36Vdc) 28V 12.5A 92.5% Through hole JHC350R41 108991634 24V (18-36Vdc) 28V 12.5A 92.5% Through hole JHC350R4Z CC109129268 CC109129276 Table 2. Device Options Option Suffix Negative remote on/off logic 1 Auto-restart 4 Unthreaded heatsink mounting holes 18 RoHS Compliant Z Asia-Pacific Headquarters Tel: +65 6416 4283 World Wide Headquarters Lineage Power Corporation 3000 Skyline Drive, Mesquite, TX 75149, USA +1-800-526-7819 (Outside U.S.A.: +1-972-284-2626) www.lineagepower.com e-mail: [email protected] Europe, Middle-East and Africa Headquarters Tel: +49 89 6089 286 India Headquarters Tel: +91 80 28411633 Lineage Power 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. © 2008 Lineage Power Corporation, (Mesquite, Texas) All International Rights Reserved. Document No: DS03-089 ver. 1.3 PDF name: jhc_jhw350_series.ds.pdf