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AN3233 データシート(PDF) 19 Page - STMicroelectronics |
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AN3233 データシート(HTML) 19 Page - STMicroelectronics |
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19 / 35 page  AN3233 Thermal map Doc ID 17595 Rev 1 19/35 5 Thermal map In order to check the design reliability, a thermal mapping by means of an IR camera was done. In Figure 20 and 21 the thermal measurements of the board, component side, at nominal input voltage, are shown. Some pointers, visible in the images, have been placed across key components or components showing high temperature. The ambient temperature during both measurements was 27 °C. Figure 20. Thermal map at 115 Vac – 60 Hz - full load Figure 21. Thermal map at 230 Vac – 50 Hz - full load Table 3. Thermal maps reference points Point Reference Description A D1 Bridge rectifier B L1 EMI filtering inductor C L2 PFC inductor D Q8 ICs supply regulator E D4 PFC output diode F R6 Inrush limiting NTC resistor G Q4 Resonant low side MOSFET H T1 Resonant power transformer |
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