A smart primary side current sensing strategy for single stage isolated PFC controller

IEICE Electronics Express

Yu Lei¹  Xi Li¹  Xi Fan¹  Jiajun Hu¹  Houpeng Chen¹  Xiaoyun Li¹  Qian Wang¹  Zhitang Song¹ 

[1] State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences

关键词: flyback;    LED driver;    PFC;    regulation accuracy;   

DOI  :  10.1587/elex.12.20150901

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(10)Cited-By(1)A novel primary side current sensing strategy is presented in this paper, which is especially suitable for the primary side controlled high power factor single-stage flyback LED controller. In order to avoid the constant-current regulation accuracy error caused by electromagnetic interference (EMI) issue, the proposed current sensing technique utilizes the switched-capacitor interleaved sample and hold circuit to obtain the middle point of the primary side current sensing period. The single-stage LED driver utilizing the proposed current sensing scheme has been implemented in CZ6H 0.35 um standard CMOS process, simulation results show that load regulation and line regulation accuracy can be improved greatly.

【 授权许可】

Unknown