Honghui Deng, Liuwei Shan, Yongsheng Yin, Guangfa Si, Yuqing Sun
{"title":"采用自适应断时控制的滞后电流控制方法设计LED恒流驱动器","authors":"Honghui Deng, Liuwei Shan, Yongsheng Yin, Guangfa Si, Yuqing Sun","doi":"10.1109/CISP.2015.7408131","DOIUrl":null,"url":null,"abstract":"A novel adaptive off-time (AOT) technique, which is applicable to the circuit design of an AC-DC constant-current LED driver using hysteresis-current control method, is proposed in this paper. The AOT is achieved by a novel off-time control method, which is based on the combination of peak-current-loop and error sample feedback-loop, to solve the problem that peak current is not consistent with average current due to the constant off-time (COT) technique in the typical low side current sense topology. Output current magnitude is controlled by sense resistor. The simulation result shows that the average current error is no more than 1.1%. The average current achieves less than 1.5% variation in the output voltage range from 20V to 100V, which means good load regulation characteristic can be achieved. The design was implemented with TSMC' 0.25μm 40V BCD process.","PeriodicalId":167631,"journal":{"name":"2015 8th International Congress on Image and Signal Processing (CISP)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":"{\"title\":\"Design of a LED constant-current driver using a novel hysteresis-current control method with adaptive off-time control\",\"authors\":\"Honghui Deng, Liuwei Shan, Yongsheng Yin, Guangfa Si, Yuqing Sun\",\"doi\":\"10.1109/CISP.2015.7408131\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A novel adaptive off-time (AOT) technique, which is applicable to the circuit design of an AC-DC constant-current LED driver using hysteresis-current control method, is proposed in this paper. The AOT is achieved by a novel off-time control method, which is based on the combination of peak-current-loop and error sample feedback-loop, to solve the problem that peak current is not consistent with average current due to the constant off-time (COT) technique in the typical low side current sense topology. Output current magnitude is controlled by sense resistor. The simulation result shows that the average current error is no more than 1.1%. The average current achieves less than 1.5% variation in the output voltage range from 20V to 100V, which means good load regulation characteristic can be achieved. The design was implemented with TSMC' 0.25μm 40V BCD process.\",\"PeriodicalId\":167631,\"journal\":{\"name\":\"2015 8th International Congress on Image and Signal Processing (CISP)\",\"volume\":\"14 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2015-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"5\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2015 8th International Congress on Image and Signal Processing (CISP)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/CISP.2015.7408131\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2015 8th International Congress on Image and Signal Processing (CISP)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/CISP.2015.7408131","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Design of a LED constant-current driver using a novel hysteresis-current control method with adaptive off-time control
A novel adaptive off-time (AOT) technique, which is applicable to the circuit design of an AC-DC constant-current LED driver using hysteresis-current control method, is proposed in this paper. The AOT is achieved by a novel off-time control method, which is based on the combination of peak-current-loop and error sample feedback-loop, to solve the problem that peak current is not consistent with average current due to the constant off-time (COT) technique in the typical low side current sense topology. Output current magnitude is controlled by sense resistor. The simulation result shows that the average current error is no more than 1.1%. The average current achieves less than 1.5% variation in the output voltage range from 20V to 100V, which means good load regulation characteristic can be achieved. The design was implemented with TSMC' 0.25μm 40V BCD process.