AN3014 datasheet(17/29 Pages) STMICROELECTRONICS

Il numero della parte	AN3014

Spiegazioni elettronici	This application note describes the characteristics and the features

PDF	29 Pages

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Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

Homepage	http://www.st.com

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17 / 29 page

AN3014

Thermal map

Doc ID 16064 Rev 2

17/29

Thermal map

In order to check design reliability, thermal mapping by means of an IR camera was done.

Below, thermal measurements of the component side of the board at nominal input voltage

are shown. The pointers on the images have been placed across key components. The

ambient temperature during both measurements was 27 °C.

Figure 16.

Thermal map at 115 Vac - 60 Hz - full load

Figure 17.

Thermal map at 230 Vac - 50 Hz - full load

The pictures highlight that although both the synchronous rectifier MOSFETs at secondary

side are working without a heatsink, their operating case temperature is lower than 60 °C.

Table 4.

Thermal map reference points

Point

Reference

Description

EMI filtering inductor

Bridge rectifier

PFC inductor

PFC output diode

Resonant high-side MOSFET

Resonant power transformer

Q11

Output rectifier MOSFETs (hottest spot)

AN3014 Scheda tecnica(PDF) 17 Page - STMicroelectronics