基于控制器LM3445的三端双向可控硅调光离线式LED驱动器

TRIAC Dimming Off-line LED Driver Based on Controller LM3445

LM3445是一种被设计成与标准三端双向可控硅(TRIAC)调光器兼容的AC-DC降压恒流LED控制器。LM3445含有一个TRIAC调光译码器,允许利用TRIAC调光器对LED进行宽范围调光。该文介绍了LM3445的特点及其应用电路与设计。

The LM3445 is a AC-DC buck （step-down） constant current LED controller designed to be compat-ible with standard TRIAC dimmer. LM3445 includes a TRIAC dim decoder and it allows wide range LED dimming using TRIAC dimmers. The features and application circuit as well as design for circuit are introduced in this paper.