AN4026 datasheet(25/40 Pages) STMICROELECTRONICS

Part #	AN4026

Description	using the L6563H and L6699

PDF	40 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

Logo

25 / 40 page

AN4026

Thermal map

Doc ID 022603 Rev 1

25/40

Thermal map

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

carried out. In Figure 26 and 27 the thermal measurements of the board, component side, at

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

across key components or showing high temperature. The ambient temperature during both

measurements was 27 °C. All components are working within their operating temperature

range with margin.

Figure 26.

Thermal map at 115 Vac - 60 Hz - full load.

Figure 27.

Thermal map at 230 Vac - 50 Hz - full load

Table 3.

Thermal map reference points

Point

Reference

Description

EMI filtering inductor

Bridge rectifier

PFC inductor – hottest point

PFC output diode

PFC MOSFET

AN4026 Datasheet(PDF) 25 Page - STMicroelectronics