郑州大学学报（理学版）2012，Vol.44Issue(3)：111-114,4.DOI:10.3969/j.issn/1671-6841.2012.03.027
大功率白光LED恒流驱动电路系统设计
Design of Constant-current Drive Circuit System of High-power White LED
摘要
Abstract
A new LED constant-current source circuit was designed. Based on the characteristic that the terminal voltage of LED was linear with the PN junction temperature with small current, PN junction temperature of LED was indirectly measured by measuring voltage at low current state to prevent the LED junction temperature from too high and to extend the LED lifetime. ASIC LT3755 of constant-current source for driving high current LED was used to simplify the design of circuit. To extend the lifetime of constant-current source circuit, the DC/DC circuit without electrolytic capacitor was adopted. The results showed that the constant-current source circuit for driving high current LED was robust and efficiently.关键词
大功率白光LED/恒流源/LT3755Key words
high-power white LED/ constant current source/ LT3755分类
信息技术与安全科学引用本文复制引用
曹卫锋,王玉琴,胡智宏..大功率白光LED恒流驱动电路系统设计[J].郑州大学学报（理学版）,2012,44(3):111-114,4.基金项目
郑州市科技局科技攻关项目,编号2010QTJH6-1. （）
