电源技术2011，Vol.35Issue(2)：218-220,3.
一种精确调光的LED电源设计
Design of precise dimming LED power supply
陈浩 1席光 2刘胜3
作者信息
- 1. 华中科技大学,武汉国家光电实验室,微光机电部,湖北,武汉,430074
- 2. 华中科技大学,机械科学与工程学院,湖北,武汉,430074
- 3. 平洲电子厂,广东,佛山,528200
- 折叠
摘要
Abstract
An LED power supply with adjustable accurate current output was designed. The power conversion part of this system was constituted by PFC and DC/DC two stages and the constant current output was controlled by PWM. A D/A circuit and analog dimming circuit were designed, which could transform PWM dimming signal into linear dimming voltage and accurately regulate the current output of the LED power supply. The intelligent dimming system with ATmega8 SCM could modulate the light with 256 grades by receiving dimming instruction from RS485 bus. The system testing and operational results show that this power system can accurately adjust its current output within a certain scope and has fault detection function, which is suitable for driving high-power LED lamp.关键词
LED电源/ATmega8单片机/智能调光/故障检测Key words
LED power supply/ ATmega8 SCM/ intelligent dimming/ fault detection分类
信息技术与安全科学引用本文复制引用
陈浩,席光,刘胜..一种精确调光的LED电源设计[J].电源技术,2011,35(2):218-220,3.
