宽输入电压范围的软开关四路均流LED驱动器  

Soft⁃Switching and Four⁃Channel Current⁃Balancing LED Driver with Wide Input Voltage Range

作　　者：张杰[1,2] 肖辞 邹晨 杨淋 ZHANG Jie;XIAO Ci;ZOU Chen;YANG Lin(Hubei Engineering Research Center for Safety Monitoring of New Energy and Power Grid Equipment,Hubei University of Technology,Wuhan Hubei 430068,China;Xiangyang Industrial Institute of Hubei University of Technology,Xiangyang Hubei 441100,China)

机构地区：[1]湖北工业大学新能源及电网装备安全监测湖北省工程研究中心,湖北武汉430068 [2]襄阳湖北工业大学产业研究院,湖北襄阳441100

出　　处：《电子器件》2024年第2期350-357,共8页Chinese Journal of Electron Devices

基　　金：2020年湖北省重点研发计划项目(2020BBB084)。

摘　　要：为了应对LED的不同输入电压等级应用场合,提出了一种具有宽输入电压范围的四路LED驱动器。该驱动器将Buck-Boost结构集成到全桥网络中,通过不同的开关组合工作在不同的模式,从而获得宽增益。采用无源均流方式实现了四路LED输出均流。由于驱动器的工作特性,开关管无需添加无损缓冲电路即可在全范围内实现零电压开通。详细分析了该驱动器的调制策略、工作原理和性能。最后,搭建了一个69 W的实验样机,实验结果表明该驱动器的输入电压范围为17 V~216 V,均流误差低于3.7%,最大效率可达97.8%。In order to cope with LED applications of different input voltage levels,a four⁃channel LED driver with a wide range of input voltage is proposed.The driver integrates a Buck⁃Boost structure into a full⁃bridge network,and operates in different modes through dif⁃ferent combinations of switches,resulting in a wide gain.The passive current balancing method is used to achieve 4 LED outputs to share the current.Due to the operating characteristics of the driver,the switches can realize the ZVS(zero⁃voltage⁃switch)under the full range without the addition of a lossless snubber circuit.The modulation strategy,operation and performance of the driver are analyzed in detail.Finally,a 69 W experimental prototype is built,and the experimental results show that the input voltage range of the driver is 17 V-216 V,the current sharing error is less than 3.7%,and the maximum efficiency is up to 97.8%.

关 键 词：LED驱动器 宽输入电压范围 软开关 均流 

分 类 号：TM46[电气工程—电器]