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AN4116 Folha de dados(PDF) 27 Page - STMicroelectronics

Nome de Peças AN4116
Descrição Electrónicos  This document describes a 12 V-350 mA power supply
PDF  38 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4116 Folha de dados(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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