AN2242参考设计：催性能，L6668的功能为基础的反激式转换器机顶盒和PVR

AN2242参考设计：催性能，L6668的功能为基础的反激式转换器机顶盒和PVR

AN2242
APPLICATION NOTE
Reference design: high performance, L6668-based flyback
converter for Set-Top boxes and PVRs

Introduction
This document describes a reference design of a 40W Switch Mode Power Supply dedicated to
Set-Top box application. The board accepts wide range input voltage (90 to 265Vrms) and
delivers 4 outputs. It is based on the new controller L6668, working in PWM fixed frequency
current mode. High efficiency and low standby consumption are the main characteristics of this
board. Such features, coupled with the minimal part count required and the global solutio