DER-360: 15V @ 500mA, 90 ~ 132 VAC in

The document describes an isolated, high power factor (PF), TRIAC-dimmable LED driver designed to drive a nominal LED string voltage of 15 V at 500 mA from an input voltage range of 90 VAC to 132 VAC. The LED driver utilizes the LYT4311E from the LYTSwitch-4 family of ICs.

The topology used is a low component count single-stage power factor corrected tapped buck configuration that delivers high efficiency, high power factor, and low THD.

High power factor and low THD is achieved by employing the LYTSwitch-4 IC which also provides a sophisticated range of protection features including auto-restart for open control loop and output short-circuit conditions. Line overvoltage provides extended line fault and surge withstand, and accurate hysteretic thermal shutdown ensures safe average PCB temperatures under all conditions.

This document contains the LED driver specification, schematic, bill of materials, transformer documentation, and typical performance characteristics.