{"title":"Design of a novel AC LED driver with no current glitch based on soft switching operation","authors":"Yang Boxin, Li Zhiming, Wu Zhaohui, Li Guoyuan","doi":"10.1109/CSTIC.2017.7919893","DOIUrl":null,"url":null,"abstract":"In this paper, a novel design on AC LED driver with no current glitch for multiple-string LEDs is presented. The LED driver can run LEDs directly from a pulsating voltage obtained by rectifying an AC voltage without any other AC-DC converter. In order to avoid current glitch due to hard switching operation, negative feedback control is used and the driver operates on a soft switching mode. Without AC-DC converter and complicated control circuit, the driving system is suitable for integration and the driver can be designed on a simple chip. Simulation results show that the lifespan is prolonged, and the quality of lighting and the efficiency of the system are improved because of no more current glitch. The proposed AC LED driver was fabricated in 1 um SPDM 5V40V700V BCD process. The measured results show that the efficiency is about 91% and the power factor is 98.5% under 3.3W 220V∼50Hz condition.","PeriodicalId":6846,"journal":{"name":"2017 China Semiconductor Technology International Conference (CSTIC)","volume":"12 1","pages":"1-5"},"PeriodicalIF":0.0000,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2017 China Semiconductor Technology International Conference (CSTIC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/CSTIC.2017.7919893","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
In this paper, a novel design on AC LED driver with no current glitch for multiple-string LEDs is presented. The LED driver can run LEDs directly from a pulsating voltage obtained by rectifying an AC voltage without any other AC-DC converter. In order to avoid current glitch due to hard switching operation, negative feedback control is used and the driver operates on a soft switching mode. Without AC-DC converter and complicated control circuit, the driving system is suitable for integration and the driver can be designed on a simple chip. Simulation results show that the lifespan is prolonged, and the quality of lighting and the efficiency of the system are improved because of no more current glitch. The proposed AC LED driver was fabricated in 1 um SPDM 5V40V700V BCD process. The measured results show that the efficiency is about 91% and the power factor is 98.5% under 3.3W 220V∼50Hz condition.
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