AN1376 25W准谐振反激式转换器机顶盒使用L6565的应用

AN1376 25W准谐振反激式转换器机顶盒使用L6565的应用

AN1376
APPLICATION NOTE
25W QUASI-RESONANT FLYBACK CONVERTER FOR
SET-TOP BOX APPLICATION USING THE L6565

This document describes a reference design of a 25W Switch Mode Power Supply
dedicated to Set-Top Box application. The board accepts full range input voltage (90 to
265Vrms) and delivers 5 outputs. It is based on the new controller L6565, working in
variable frequency mode.

1 INTRODUCTION
Set-Top Boxes are growing very fast and they are becoming very popular in all Countries ei-
ther for satellite or cable decoding. Hence the market is asking for solutions having high cost
effectiveness, providing for good performances, low