电工技术学报  2021, Vol. 36 Issue (10): 2081-2091    DOI: 10.19595/j.cnki.1000-6753.tces.200110
电力电子 |
谐振式单开关多路低纹波输出LED驱动器
吕寻斋, 刘雪山, 周群, 史旭, 贺明智
四川大学电气工程学院 成都 610065
Resonant Single-Switch Multi-Channel Low-Ripple LED Driver
Lü Xunzhai, Liu Xueshan, Zhou Qun, Shi Xu, He Mingzhi
College of Electrical Engineering Sichuan University Chengdu 610065 China
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摘要 该文提出一种谐振式单开关多路低纹波输出LED驱动器。所提出的LED驱动器由前级Buck-Boost功率因数校正(PFC)变换器与后级谐振式多路均流输出DC-DC变换器通过一个有源开关整合而成,简化了拓扑结构和控制回路。该LED驱动器利用谐振电容的电荷平衡实现多路输出的均流控制,因此只需控制其中一条输出支路的电流,其他输出支路可实现自动均流。利用宽带宽电压模式控制环路,消除了Buck-Boost PFC变换器输出电压纹波对各输出支路的影响,即实现了多路低电流纹波输出。最后搭建了一台82W的三路恒流输出实验样机,验证了理论分析的正确性。
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关键词 多路均流Buck-BoostLED驱动器功率因数校正    
Abstract:This paper presents a resonant single-switch multi-channel low-ripple LED driver. The proposed LED driver is integrated with a front-end Buck-Boost power factor correction (PFC) converter and a back-end resonant multi-channel current-sharing output DC-DC converter through an active switch, which simplifies the topology and control loop. The proposed LED driver realizes the current sharing control of the multi-output using the charge balance of the resonant capacitor. Therefore, only the current of one output branch is controlled, the current of other output branches can be automatically balanced. Through the wide-bandwidth voltage mode control loop, the effect of the output voltage ripple of the Buck-Boost PFC converter on each output branch is eliminated, i.e., low output current ripple of the multiple LED strings can be realized. Finally, an 82W three-string LED driver prototype was built to verify the theoretical analysis.
Key wordsCurrent balancing    Buck-Boost    light emitting diode (LED) driver    power factor correction   
收稿日期: 2020-02-03     
PACS: TM46  
基金资助:中央高校基本科研业务费专项资金(YJ201909)和四川大学自贡市校地合作专项资金(2019CDZG-14)资助项目
通讯作者: 刘雪山,男,1981年生,副教授,研究方向为高频开关变换器拓扑及其控制技术、电力电子技术及其应用。E-mail:xueshan5851@163.com   
作者简介: 吕寻斋,男,1990年生,硕士研究生,研究方向为开关变换器的拓扑及控制技术。E-mail:15325203@qq.com
引用本文:   
吕寻斋, 刘雪山, 周群, 史旭, 贺明智. 谐振式单开关多路低纹波输出LED驱动器[J]. 电工技术学报, 2021, 36(10): 2081-2091. Lü Xunzhai, Liu Xueshan, Zhou Qun, Shi Xu, He Mingzhi. Resonant Single-Switch Multi-Channel Low-Ripple LED Driver. Transactions of China Electrotechnical Society, 2021, 36(10): 2081-2091.
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