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EBVW025A0B641Z Datasheet(PDF) 10 Page - Lineage Power Corporation |
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EBVW025A0B641Z Datasheet(HTML) 10 Page - Lineage Power Corporation |
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10 / 16 page  Data Sheet June 27, 2012 EBVW025A0B Series Power Modules; DC-DC Converters 36-75Vdc Input; 12Vdc Output; 25A Output Current LINEAGE POWER 10 Feature Descriptions (continued) Heat-dissipating components are mounted on the top side of the module. Heat is removed by conduction, convection and radiation to the surrounding environment. Proper cooling can be verified by measuring the thermal reference temperature (THx). Peak temperature (THx) occurs at the position indicated in Figure 18 and 19. For reliable operation this temperature should not exceed the listed temperature threshold. Figure 18. Location of the thermal reference temperature TH1. Do not exceed 113 °C. Figure 19. Location of the thermal reference temperature TH2 for Base Plate module. Do not exceed 110 °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 temperature of the power modules is THx, 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 Board-Mounted 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. The thermal derating of figures 20 through 22 show the maximum output current that can be delivered by each module in the indicated orientation without exceeding the maximum THx temperature versus local ambient temperature (TA) for air flows of, Natural Convection, 1 m/s (200 ft./min), 2 m/s (400 ft./min). The use of Figures 20 is shown in the following example: Example What is the minimum airflow necessary for a EBVW025A0B operating at VI = 48 V, an output current of 14A, and a maximum ambient temperature of 70 °C in transverse orientation. Solution: Given: Vin= 48V, IO = 14A, TA = 70 °C Determine required airflow (V) (Use Figure 20): V = 200LFM or greater. LOCAL AMBIENT TEMPERATURE, TA (C) Figure 20. Output Current Derating for the Open Frame EBVW025A0B in the Transverse Orientation; Airflow Direction from Vin(-) to Vin(+); Vin = 48V. LOCAL AMBIENT TEMPERATURE, TA (C) Figure 21. Output Current Derating for the Base Plate EBVW025A0Bxx-H in the Transverse Orientation; Airflow Direction from Vin(-) to Vin(+); Vin = 48V. LOCAL AMBIENT TEMPERATURE, TA (C) Figure 22. Output Current Derating for the Base Plate EBVW025A0Bxx-H and 0.25” heat sink in the Transverse Orientation; Airflow Airflow Direction from Vin(-) to Vin(+); Vin = 48V. |
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