一种基于Link606带无源PFC电路的开关电源

A Switch Power Supply with Passive PFC Based on Link 606

本文介绍一种带无源PFC的开关电源的实现方法，并将其与不带PFC功能的传统开关电源进行比较，阐述其工作原理，进一步从细节上分析其实现PFC作用的方式。选择PI公司的LINK606系列芯片，与该无源PFC电路组合，设计了一款开关电源，使该电源输出恒流。本文还给出了相关原理图、波形和实验数据。

This article introduces a way to achieve the switch power supply with passive PFC, compares it with the traditional switch power supply without PFC function, and expounds the working principle of the former, with the further analysis about the passive PFC function in detail. The switch power supply is designed to output a constant current by using IP＇s LINK606 series CMOS chips in combination with the passive PFC. In this paper, the relevant schematic diagram, waveforms and some experiment data are also provided.