DER-344: 800mA @ 17V Max, 140 ~ 280VAC in

The document describes a non-isolated high power factor (PF) LED driver designed to drive a nominal LED string voltage of 16 V at 800 mA from an input voltage range of 140 VAC to 280 VAC. The LED driver utilizes the LNK414EG from the LinkSwitch-PH family of ICs.

The topology used is a single-stage non-isolated continuous mode tapped buck (combined PFC and CC in a single switching stage).

High power factor and low THD is achieved by employing the LinkSwitch-PH IC which also provides a sophisticated range of protection features including auto-restart for open control loop and output short-circuit conditions. Integrated line overvoltage protection provides extended line fault and surge withstand.

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