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AN4116 датащи(PDF) 27 Page - STMicroelectronics

номер детали AN4116
подробное описание детали  This document describes a 12 V-350 mA power supply
PDF  38 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
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AN4116 датащи(HTML) 27 Page - STMicroelectronics

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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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