基于斩波调制的LED亮度控制  

LED Brightness Control Based on Chopper Modulation

作　　者：刘景文[1] 

机构地区：[1]天津滨海职业学院,天津300451

出　　处：《现代工业经济和信息化》2016年第19期29-30,共2页Modern Industrial Economy and Informationization

摘　　要：在LED的发光亮度与流过此LED的正向工作电流基本上成正比关系前提下,通过LED的正向工作电流采样电路、亮度值生成电压电路、斩波调制电路的设计,实现基于斩波调制的LED亮度精确控制。通过改变电路参数,可满足多种亮度控制应用。Under the premise of basically proportional relationship between LED luminous brightness and positive working current,through the sampling circuit of LED positive working current, brightness-value generated voltage circuit, and chopper modulation circuit design, this paper realizes accurate control of LED brightness based on chopper modulation. By changing the parameters of circuit, a variety of brightness control applications are realized.

关 键 词：斩波调制 电流型DA转换 BUCK电路 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]