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QBVS050A0B41HZ Datasheet(PDF) 9 Page - Lineage Power Corporation |
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QBVS050A0B41HZ Datasheet(HTML) 9 Page - Lineage Power Corporation |
9 / 16 page GE Data Sheet QBVS050A0B Barracuda Series; DC-DC Converter Power Modules 52-60Vdc Input; 12.0Vdc, 50.0A, 600W Output October 31, 2013 ©2012 General Electric Company. All rights reserved. Page 9 Feature Descriptions (continued) Figure 16. Location of the thermal reference temperature TH1 for base plate module. Heat Transfer via Convection The thermal data presented here is based on physical measurements taken in a wind tunnel, using automated thermo-couple instrumentation to monitor key component temperatures: FETs, diodes, control ICs, magnetic cores, ceramic capacitors, opto-isolators, and module pwb conductors, while controlling the ambient airflow rate and temperature. For a given airflow and ambient temperature, the module output power is increased, until one (or more) of the components reaches its maximum derated operating temperature, as defined in IPC-9592A. This procedure is then repeated for a different airflow or ambient temperature until a family of module output derating curves is obtained. 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. Figure 17. Thermal Test Setup . Increased airflow over the module enhances the heat transfer via convection. The thermal derating of figure 18- 21 shows 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 several air flow conditions. LOCAL AMBIENT TEMPERATURE, TA (C) Figure 18. Output Current Derating for the QBVS050A0Bxx-H in the Transverse Orientation; Airflow Direction from Vin(-) to Vin(+); Vin = 54V. LOCAL AMBIENT TEMPERATURE, TA (C) Figure 19. Output Current Derating for the QBVS050A0Bxx-H + 0.5” Heat Sink in the Transverse Orientation; Airflow Direction from Vin(-) to Vin(+); Vin = 54V. LOCAL AMBIENT TEMPERATURE, TA (C) Figure 20. Output Current Derating for the QBVS050A0Bxx-H in the Longitudinal Orientation; Airflow Direction from Vout to Vin; Vin = 54V. |
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