AN3256低成本LED驱动器为AN9中灯泡

AN3256低成本LED驱动器为AN9中灯泡

AN3256
Application note

Low-cost LED driver for an A19 lamp

Introduction
This application note describes a prototype of a non-dimmable, non-isolated LED driver.
The physical design is small enough to fit in the base of an A19 (screw bases 40 to 60 W
equivalent) bulb outline. The coupled inductor has a stepdown winding to power the L6562A
PFC driver.
The design goals:
■ Input: 96-132VAC, 60 Hz, non-dimmable, TRIAC dimmer safe (no damage)
■ Output: 370 mA into strings of 5 to 12 LEDs
■