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ESTW010A0A Datasheet(PDF) 9 Page - Lineage Power Corporation |
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ESTW010A0A Datasheet(HTML) 9 Page - Lineage Power Corporation |
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9 / 19 page  Data Sheet November 29, 2011 ESTW010A0A Series Eighth-Brick Power Modules 36 –75Vdc Input; 5.0Vdc Output; 10A Output Current LINEAGE POWER 9 Thermal Considerations The power modules operate in a variety of thermal environments; however, sufficient cooling should be provided to help ensure reliable operation. 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. The thermal reference points, Tref1 and Tref2, used in the specifications for open frame modules are shown in Figure 13. For reliable operation these temperatures should not exceed 110 oC and 125 oC respectively. Figure 13. Tref 1 & Tref2 Temperature Measurement Locations for Open Frame Module. The thermal reference point, Tref, used in the specifications for modules with heatplate is shown in Figure 14. For reliable operation this temperature should not exceed 110 oC. Figure 14. Tref Temperature Measurement Location for Module with Heatplate. Heat Transfer via Convection Increased airflow over the module enhances the heat transfer via convection. Derating curves showing the maximum output current that can be delivered by each module versus local ambient temperature (TA) for natural convection and up to 1m/s (200 ft./min) forced airflow are shown in Figure 15. 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. AMBIENT TEMEPERATURE, TA ( oC) Figure 15. Output Current Derating for the Open Frame Module; Airflow in the Transverse Direction from Vout(+) to Vout(-); Vin =48V. AMBIENT TEMEPERATURE, TA ( oC) Figure 16. Output Current Derating for the Module with Heatplate; Airflow in the Transverse Direction from Vout(+) to Vout(-); Vin =48V. AMBIENT TEMEPERATURE, TA ( oC) Figure 17. Output Current Derating for the Open Frame Module with Heatplate and 0.25” Heatsink; Airflow in the Transverse Direction from Vout(+) to Vout(-); Vin =48V. AIRFLOW |
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