电测与仪表2012，Vol.49Issue(7)：97-100,4.
基于无光耦反激变换器的LED驱动电源设计
Design of LED Driver Power Supply Based on Flyback Converter without Photocoupler
摘要
Abstract
In order to realize constant current control and isolation between input and output,in traditional LED power supply using Flyback converter as main circuit,photocoupler is needed to transfer the feedback signal from primary side to secondary side.Consider of the large size of photocoupler and the influence of current transfer ratio due to temperature variation,the Flyback converter with primary side control is used as main circuit to decrease the number of components and the influence of the temperature.Without photocoupler the main circuit has less cost,smaller size,higher power density and less influence of temperature.With this power supply,the LED current can be regulated to realize the control of the lightness and the voltage of the LED can also be controlled to realize the open protection of LED.关键词
LED驱动电源/反激变换器/断续模式Key words
power supply of LED,flyback converter,discontinuous conduction mode分类
信息技术与安全科学引用本文复制引用
沈霞,李红伟,许瑾..基于无光耦反激变换器的LED驱动电源设计[J].电测与仪表,2012,49(7):97-100,4.基金项目
四川省教育厅重点项目资助项目(11ZA022) （11ZA022）
四川省教育厅理科项目资助项目(12ZB161) （12ZB161）
