摘要
为提高PFM开关电源控制电路的抗电磁干扰能力,分析了PFM模式开关电源控制电路的抗电磁干扰原理,提出了随机载波频率调制技术和相应的电路实现方法;列举了几种电源系统抗电磁干扰设计技术,包括ESD保护结构的抗EMI设计方法、电源上干扰的去除方法和基于电压检测电路的抗干扰设计方法。将以上抗干扰设计技术应用在PFM模式开关电源控制电路SX1618中,采用1μm 40 V高压工艺设计,通过进行流片和封装,并将之应用在实际的开关电源中,其传导EMI通过了相应标准的测试。
To improve Anti-electromagnetic interference level,the principle of anti-EMI for PFM SMPS IC is analyzed,and the Random Carrier Frequency Modulation(RCFM)technology is given,the implementation of RCFM circuit is proposed.Several anti-EMI technologies for power supply are listed,which include anti-EMI design for ESD structure,the method for EMI removing from power supply and anti-EMI design by using voltage detection.RCFM and other anti-EMI technologies are applied to PFM controller SX1618,which is implemented in 1μm 40 V high voltage process,and the test result shows that the anti-EMI performance is good.
作者
徐振邦
居水荣
王天赦
沈济
XU Zhenbang;JU Shuirong;WANG Tianshe;SHEN Ji(Jiangsu College of Information Technology,Wuxi Jiangsu 214153,China)
出处
《电子器件》
CAS
北大核心
2018年第2期536-542,共7页
Chinese Journal of Electron Devices
基金
江苏省教育厅项目"江苏高校品牌专业建设工程一期工程(微电子技术)"(PPZY2015B190)
江苏省教育厅"青蓝工程"科技创新团队项目
关键词
集成电路设计
抗电磁干扰
随机频率调制
电源干扰
开关电源控制电路
脉冲频率调制
integrated circuit design
anti-electromagnetic interference
random carrier frequency modulation
power supply interference
switched mode power supply IC
pulse frequency modulation
