A General Primary Side Constant Current Control Method

摘要：

　　The primary side constant current (CC) control method is widely adopted for LED driver and portable device charger applications due to its simplicity and low cost.However,most of the primary side CC control method now is only suitable for discontinuous current mode (DCM) mode or critical conduction mode (CRM).This paper proposes a general primary side control method suitable for both continuous current mode (CCM),CRM and DCM,which can be adopted for most of the topologies like Buck,Boost and Buck-Boost (or Flyback).The output current is calculated by the average of primary side switch current,primary side switch on time,and secondary side diode on time with a very simple analog circuit.The detailed operation principles and implementation circuits for a Flyback converter are presented as an example.Experimental results from a 5V/2A prototype verify the theoretical analysis.

关键词： Primary side control constant current Flyback converter

会议类型: 国内会议

会议名称: 第十一届中国国际半导体照明论坛

会议地点: 宜昌

会议语种:英文

页码: 1-7

在线出版日期: 2014-05-15（万方平台首次上网日期，不代表论文的发表时间）