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AN4116 датащи(PDF) 27 Page - STMicroelectronics |
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AN4116 датащи(HTML) 27 Page - STMicroelectronics |
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27 / 38 page ![]() AN4116 Thermal measurements Doc ID 023220 Rev 1 27/38 8 Thermal measurements A thermal analysis of the board has been performed using an IR camera for 85 VAC, 115 VAC, 230 VAC and 265 VAC mains input, full load condition, both with and without the self- biasing function. The results are shown in the following figures. When the self-biasing function is used, the VIPER06 temperature is higher, due to the power dissipated by the HV- startup generator. Figure 39. Thermal map at VIN=85 VAC, TAMB=25 °C, full load; IC externally biased Figure 40. Thermal map at VIN=85 VAC, TAMB=25 °C, full load; IC self-biased Figure 41. Thermal map at VIN=115 VAC, full load, TAMB=25 °C; IC externally biased Figure 42. Thermal map at VIN=115 VAC, full load, TAMB=25 °C; IC self-biased |
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