电子器件2024，Vol.47Issue(2)：350-357,8.DOI:10.3969/j.issn.1005-9490.2024.02.009
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
摘要
Abstract
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Key words
LED driver/wide input voltage range/soft switching/current balancing分类
信息技术与安全科学引用本文复制引用
张杰,肖辞,邹晨,杨淋..宽输入电压范围的软开关四路均流LED驱动器[J].电子器件,2024,47(2):350-357,8.基金项目
2020年湖北省重点研发计划项目(2020BBB084) （2020BBB084）
