AN3233 datasheet(19/35 Pages) STMICROELECTRONICS

Part #	AN3233

Description	This application note describes the characteristics

PDF	35 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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19 / 35 page

AN3233

Thermal map

Doc ID 17595 Rev 1

19/35

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

Bridge rectifier

EMI filtering inductor

PFC inductor

ICs supply regulator

PFC output diode

Inrush limiting NTC resistor

Resonant low side MOSFET

Resonant power transformer

AN3233 Datasheet(PDF) 19 Page - STMicroelectronics