AN3105 datasheet(17/30 Pages) STMICROELECTRONICS

Part #	AN3105

Description	lighting applications

PDF	30 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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17 / 30 page

AN3105

Functional check

Doc ID 16774 Rev 2

17/30

4.6

Thermal map

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

done. In Figure 13 and 14 the thermal measurements of the board, both sides, at nominal

input voltage are shown. Some pointers visible on the images have been placed across key

components. The ambient temperature during both measurements was 27 °C.

Figure 13.

Thermal map at 230 VAC - 50 Hz - full load - PCB top side

Table 2.

Thermal maps reference points - PCB top side

Point

Reference

Description

EMI filtering inductor

PFC inductor

Bridge rectifier

PFC MOSFET

Output filter inductor

Resonant power transformer - primary winding

Resonant power transformer - ferrite core

Resonant power transformer - secondary winding

AN3105 Datasheet(PDF) 17 Page - STMicroelectronics