Reference Design Library > Lighting > LED Drivers - AC / Offline > DER-340: 750mA @ 54V Max, 90 ~ 300VAC In

DER-340: 750mA @ 54V Max, 90 ~ 300VAC In

Summary

The document describes a non-isolated high power factor (PF) LED driver designed to drive a nominal LED string voltage of 54 V at 750 mA from an input voltage range of 90 VAC to 300 VAC. The LED driver utilizes the LNK419EG from the LinkSwitch-PH family of ICs.

The topology is a single-stage non-isolated buck converter that meets the high efficiency requirements for this design. Good line and load output current regulation is achieved by directly sensing the output current and using shunt regulator for closed-loop feedback control.

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 to prevent damage in the event of open control loop or during output short-circuit. Line overvoltage protection provides extended line fault and surge withstand. Output overvoltage protects the supply should the load be disconnected. Accurate hysteretic thermal shutdown ensures safe PCB temperatures under all conditions.

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

Specifications

Manufacturer Power Integrations
Category Lighting
Sub-Category LED Drivers - AC / Offline
Eval Board Board not Stocked
AC Voltage 115 V
230 V
Universal
Outputs and Type 1 Non-Isolated
Current Out 750 mA
Voltage Out (Max) 54 V
Efficiency @ Conditions >88%, 130 ~ 295 VAC, @ 57 V
>87%, 130 ~ 265 VAC, @ 51 V
>87%, 115 ~ 300 VAC, @ 54 V
Features Current Limit (Adj. or Fixed)
Frequency Jitter for EMI
Open Circuit Protection
Short Circuit Protection
Thermal Protection
Under Voltage Protection, Brown-Out
Switching Frequency 66 kHz
Component Count + Extras 52 + 0
Design Author Power Integrations
Application / Target Market Lighting: LED Street Lighting
Voltage In 90 ~ 300 VAC
Power Factor >0.9
Standard(s) EN55015 B conducted EMI
IEC 61000-3-2 Class C
IEC 61000-4-5 Ringwave
Main I.C. Base Part LNK419
Date Created By Author 2012-08
Date Added To Library 2014-08

Support Documents & Media

DER-340 - User Guide LNK403-410/413-420 - Datasheet

Media

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