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March 2009 Rev 1 1/10
AN2936
Application note
10 W SMPS with HV power MOSFET and the L6565
for three-phase industrial applications
Introduction
This document introduces a solution for industrial power supplies fed by a three-phase
mains. It uses a high voltage power MOSFET with 1500 V breakdown voltage to optimize
the operation of a quasi-resonant flyback converter based on the primary controller L6565.
The STEVAL-ISA034V1 demonstration board has been designed and developed for low
power applications. The board features two isolated outputs, 12 V and 5 V, and is capable of
delivering up to 10 W.
The board can be ordered through order code STEVAL-ISA034V1.
Figure 1. 10 W board prototype
AM01332v1
www.st.com
