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AN3203 データシート(PDF) 24 Page - STMicroelectronics |
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AN3203 データシート(HTML) 24 Page - STMicroelectronics |
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24 / 49 page  Electrical performance AN3203 24/49 Doc ID 17402 Rev 2 4.2 Thermal considerations This demonstration board has been designed for operation with forced air cooling, very common in ATX power supply applications. As the component temperatures depend on the type of fan used and on the airflow path inside the board housing, a thermal map of the board isn’t significant and has not been taken. When the system works at 25 °C with full load and no forced air, temperatures are not so high. If a heatsink with lower thermal resistance for MOSFETs Q201 and Q202 is used, fanless operation may be achieved. For example, the same shape of the heatsink used for D1, Q1, Q2, D3, Q101, and Q102 could be used for fanless operation. A picture of this application is shown in Figure 18. Figure 18. Fanless board |
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