AN2711 120 VAC输入，可控硅可调光LED驱动器，基于L6562A

AN2711 120 VAC输入，可控硅可调光LED驱动器，基于L6562A

AN2711
Application note

120 VAC input-Triac dimmable LED driver based on the L6562A

Introduction
The cost of power LEDs is rapidly decreasing, while performance is improving. Their
efficacy (light out per watt in) is now competitive with compact fluorescent lamps, while their
life cycle is significantly longer at 100,000 full-power hours (11+ years) at half brightness.
Dimming LEDs can extend the life cycle further, and also reduce power drain. By far the
most common dimming method is the Triac phase-control dimmer, which directly replaces
the AC On-Off switch