电子器件2017，Vol.40Issue(3)：581-587,7.DOI:10.3969/j.issn.1005-9490.2017.03.013
PWM开关电源控制电路的抗电磁干扰设计
Anti-EMI Design for PWM Switched Mode Power Supply IC
摘要
Abstract
Three design ways are presented for SMPS IC in order to improve its anti-EMI performance.The switched MOSFET is conducted at the first valley and the peak conductive current is reduced when Quasi-Resonant operation mode is adopted for SMPS IC.Bandwidths of each current and voltage harmonic of SMPS are extended through the adoption of frequency changeable techniques,and the amplitude of higher harmonics is cut down.The ripple wave of current is reduced through the adoption of limiting switched current.The controller SX1608 is implemented in 0.25 μm 5 V/40 V BCD process,and the test result shows that the anti-EMI performance is good,and the ripple wave of current is low.关键词
集成电路设计/开关电源控制电路/抗电磁干扰/准谐振模式/谷底导通/"变频"技术Key words
integrated circuit design/switched mode power supply IC/anti-EMI/quasi-resonant operation/valley on/frequency changeable technique分类
信息技术与安全科学引用本文复制引用
徐振邦,居水荣,席筱颖,陈国金..PWM开关电源控制电路的抗电磁干扰设计[J].电子器件,2017,40(3):581-587,7.基金项目
江苏省教育厅项目(PPZY2015B190) （PPZY2015B190）
江苏省教育厅"青蓝工程"科技创新团队项目 （）
