BUCK电源模块输出电容ESR在线检测电路设计  

Design of Online Monitoring Circuit for ESR of the Output Capacitor of BUCK Power Module

作　　者：雷登云 段孝星 王力纬[1,2] 侯波 恩云飞[1,2] 陈义强 LEI Dengyun;DUAN Xiaoxing;WANG Liwei;HOU Bo;EN Yunfei;CHEN Yiqiang(Science and Technology on Reliability Physics and Application of Electronic Component Laboratory Guangzhou 510610,China;China Electronic Product Reliability and Environmental Testing Research Institute,Guangzhou 510610,China;School of Electronic and Information Engineering,South China University of Technology,Guangzhou 510641,China)

机构地区：[1]工业和信息化部电子第五研究所,广东广州510610 [2]电子元器件可靠性物理及其应用技术重点实验室,广东广州510610 [3]华南理工大学电子与信息学院,广东广州510641

出　　处：《电子产品可靠性与环境试验》2019年第2期26-30,共5页Electronic Product Reliability and Environmental Testing

基　　金：科技创新基金项目(JWV 1728010);重点实验室基金项目(JAB 1728170);广东省自然科学杰出青年基金项目(2015A030306002);广东特支计划科技创新青年拔尖人才项目(2015TQ01X030)资助

摘　　要：电解电容性能退化是电源失效的重要原因,等效串联电阻是电解电容状态的重要表征,因此在线监测等效串联电阻成为了开关电源健康监测的重要手段。提出了一种在线监测滤波电容等效串联电阻的方法,构建了BUCK电源等效串联电阻计算模型,设计了滤波电容在线监测电路,在不改变电路结构的情况下实现了对滤波电容的监测。The degradation of electrolytic capacitance performance is an important cause of power failure,and the equivalent series resistance is an important indicator of the state of electrolytic capacitance.Therefore,on-line monitoring of equivalent series resistance has become an important means of health monitoring of switching power supply.A method of on-line monitoring the equivalent series resistance of filter capacitor is proposed,and the calculation model of equivalent series resistance of BUCK power supply is constructed.Besides,the on-line monitoring circuit of filter capacitor is designed so that the filter capacitance is monitored without changing the circuit structure.

关 键 词：电解电容 等效串联电阻 降压型开关电源 在线检测 

分 类 号：TN702[电子电信—电路与系统]