电子器件Issue(1)：46-49,4.DOI:10.3969/j.issn.1005-9490.2014.01.012
原边控制带TRIAC调光的LED驱动电源的设计
Design of LED Driver for Primary-Side Control with TRIAC Dimming
摘要
Abstract
The TRIAC dimmer is a most popular dimmer at present. To solve the problems such as flicker, the narrow dimmable range and low efficiency with TRIAC controller of LED lighting system, an LED driver with primary constant control and TRIAC dimming function based on the chip FL7730 is proposed. In the circuit, a passive discharge circuit is given to provide the hold current and latching current for TRIAC,and an active damper circuit to suppress the spike voltage when the dimmer turns on. As is verified through the experiment, the power factor of the dimming driver is higher than 0. 9,the efficiency is over 0. 8,and flicker-free dimming is implement.关键词
LED驱动/可控硅调光/原边控制/反激变换Key words
LED driver/TRIAC dimming/primary-side control/flyback converter分类
信息技术与安全科学引用本文复制引用
杨巍巍,史永胜,刘丹妮..原边控制带TRIAC调光的LED驱动电源的设计[J].电子器件,2014,(1):46-49,4.基金项目
陕西省教育厅基金项目(11JK0837,12JK0494) （11JK0837,12JK0494）
陕西科技大学博士专项基金项目(BJ08-07) （BJ08-07）
