摘要
大功率LED是一种新型半导体光源,寿命长,节能环保。该文简要介绍了LED的特点和电学特性,分析了现有驱动电路的优缺点,设计并实现了一种用普通开关电源专用芯片UC3843为控制电路的大功率LED恒流驱动电路,并对其外围电路进行优化设计,实现了大功率LED的PWM调光控制。
High power LED is a kind of new lamp-house,which has longer life,higher efficient and lower electricity power consumption than incandescent lamps and fluorescent bulbs.It is also a kind of ideal green lighting source.According to the characteristic of LED,a constant current circuit of high power LED driver is designed in this paper based on the specific chip UC3843 of SMPS.Optimizes peripheric circuit of the design and implements the PWM dimming control of high power LED.
出处
《杭州电子科技大学学报（自然科学版）》
2007年第5期72-75,共4页
Journal of Hangzhou Dianzi University：Natural Sciences
