电工技术学报2016，Vol.31Issue(23)：189-198,10.
基于集成三端口变换器的无电解电容LED驱动
An Electrolytic Capacitor-Less LED Driver Based on an Integrated Three-Port Converter
摘要
Abstract
The electrolytic capacitor is the key component that limits the lifetime of AC-DC light-emitting diode(LED)driver.Therefore,how to eliminate the electrolytic capacitor in LED drivers is a key problem.In this paper,an electrolytic capacitor-less LED driver which is integrated by Flyback converter and Buck converter was proposed.The driver is highly integrated with simple control.In the proposed circuit,the relationship between input power(pin)and output power(po)was divided into two modes: pin>po and pin<po,in order to avoid double energy conversion.The lowfrequency pulse power was balanced by the energy-storage capacitor of the third port which is done by charge and discharge.Parameter design of the main circuit was addressed following the analysis of operating principle and switching-modes,as well as the control circuit.Finally,a prototype was built to verify the correctness and effectiveness of the driver.关键词
LED驱动电源/Flyback变换器/无电解电容/三端口变换器Key words
LED driver/Flyback converter/electrolytic capacitor-less/threeport converter分类
信息技术与安全科学引用本文复制引用
汪飞,钟元旭,李林,阮毅..基于集成三端口变换器的无电解电容LED驱动[J].电工技术学报,2016,31(23):189-198,10.基金项目
国家自然科学基金项目(51107078)和上海市教育委员会科研创新项目(15ZZ043)资助. （51107078）
