An ACHT With EAOT Constant Current Control Method in LED Lighting

摘要：

　　A control method named average current-detection and hysteresis turn-off(ACHT)with enhanced adaptive off-time(EAOT)in non-isolated buck LED driver is proposed in this paper to achieve accurate constant current.The proposed control method is implemented by the ACHT loop which is utilized to control on-time and the EAOT loop which is utilized to generate an adaptive off-time(AOT).Five conventional control methods are thoroughly analyzed and compared.Analysis and results prove that the proposed ACHT with EAOT can detect valley current based on low-side sensing method,work stably,output average current with high precision,and avoid the current spike without introducing leading-edge blanking(LEB).The design was implemented with TSMC 1μm 700V BCD process.

关键词： Constant Current Control Method Valley Current Detection by Side Sensing Method Accurate Constant Current

作者: Yanqiu Duan Jian Fang Rongxing Lai Xing Tong Bo Zhang

作者单位: State Key Laboratory of Electronic Thin Films and Integrated Device,University of Electronic Science and Technology of China,Chengdu 610054,China

会议类型: 国际会议

会议名称: 2019 2nd International Conference on Mechanical Engineering, Industrial Materials and Industrial Electronics (MEIMIE 2019)2019年第二届机械工程、工业材料和工业电子国际会议(Meimie 2019)

会议地点: 大连

会议语种:英文

页码: 167-173

在线出版日期: 2019-03-29（万方平台首次上网日期，不代表论文的发表时间）