电测与仪表2016，Vol.53Issue(12)：81-86,6.
多 MOSFET 并联均流的高稳定度恒流源研究
Research on the high stable constant current source based on multi-MOSFETs in paralleling connection
摘要
Abstract
In this paper , an approach for a high stable constant current source is presented , which is based on multi-ple power MOSFETs paralleling connection method , the maxim output of current source is up to 30 A, and it is con-tinuously adjustable .The performance of the designed constant current source has been tested , and the measurement results indicate that the stability of constant source is better than 5 ppm when the current is 30 A.The working princi-ple of the designed constant current circuit is analyzed in detail , and the selection of key components is explained clearly.We use the high precision reference voltage source and current series negative feedback based on high -power precision sample resistor to increase the stability of system .In order to realize the high stable current , multiple MOS-FETs in paralleling connection are used as regulator , and systematic analysis on factors affecting MOSFETs in paralle-ling work are presented as well .The constant current source that we designed has a certain reference value for the de-sign of DC current source .关键词
恒流源/高稳定度/串联负反馈/MOSFET并联均流Key words
constant current source/high stability/series negative feedback/MOSFET paralleling connection分类
信息技术与安全科学引用本文复制引用
张存凯,李正坤,陈乐,张钟华..多 MOSFET 并联均流的高稳定度恒流源研究[J].电测与仪表,2016,53(12):81-86,6.基金项目
国家重大科学仪器设备开发专项项目 （）
