中国电机工程学报2017，Vol.37Issue(16)：4780-4790,11.DOI:10.13334/j.0258-8013.pcsee.161289
一种单级隔离恒流输出LED驱动电源的分析与设计
Analysis and Design of a Single-stage Isolated LED Driver With Constant Current Output
黄健 1罗全明 1何青青 1章治国 1周雒维1
作者信息
- 1. 输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆市沙坪坝区400044
- 折叠
摘要
Abstract
In order to reduce cost and volume in the ac input LED lighting system applications,the single-stage LED driver is often used to drive LEDs with constant current.Therefore,a single-stage isolated LED driver is proposed in this paper,which integrates a Buck-Boost power factor correction unit operating in the discontinuous current mode into an isolated DC/DC conversion unit with a voltage doubler rectifier circuit by sharing a same power switch.The power factor correction unit can achieve unity power factor when the duty ratio of the switch keeps constant.Since there is a voltage doubler rectifier circuit in the isolated DC/DC conversion unit,the magnetic core utilization can be improved and the voltage stress of the secondary diodes can be decreased.Firstly,the operating principle of LED driver is analyzed in this paper.Then,the performance of the main circuit is selectively analyzed and all parameters are quantitatively designed in detail.Finally,a 120W experimental prototype is built according to the results of parameter design,and the experimental results are presented,which have verified the correctness of the theoretical analysis and parameter design.关键词
LED驱动电源/单级结构/功率因数校正/参数设计Key words
LED driver/single-stage structure/power factor correction/parameter design分类
信息技术与安全科学引用本文复制引用
黄健,罗全明,何青青,章治国,周雒维..一种单级隔离恒流输出LED驱动电源的分析与设计[J].中国电机工程学报,2017,37(16):4780-4790,11.
