DER-173: 20V @ 700mA, 195 ~ 265VAC in


This engineering report describes a non-isolated 14 W output and high-line input voltage range (195 VAC–265 VAC) power supply utilizing the TNY279GN for an LED lighting application.

The LED array and enclosure were designed to provide safety isolation to the end user. Therefore the output of this design is not electrically isolated from the AC input.

This document contains the complete specification of the power supply, a detailed circuit diagram, the entire bill of materials required to build the supply, the transformer design, the test data, and the oscillographs of the power supply’s most important electrical waveforms.


Manufacturer Power Integrations
Category Lighting
Sub-Category LED Drivers - AC / Offline
Eval Board -
AC Voltage 230 V
Outputs and Type 1 Non-Isolated
Current Out 700 mA
Voltage Out (Max) 20 V
Efficiency @ Conditions >87%, 195 ~ 265 VAC, full load
Features Current Limit (Adj. or Fixed)
Open Circuit Protection
Over Voltage Protection
Short Circuit Protection
Shutdown, Enable, Standby
Thermal Protection
Under Voltage Protection, Brown-Out
Switching Frequency 132 kHz
Component Count + Extras 31 + 0
Design Author Power Integrations
Application / Target Market LED Commercial Lighting
LED Street Lighting
Voltage In 195 ~ 265 VAC
Power Factor
Main I.C. Base Part TNY279
Date Created By Author 2008-04
Date Added To Library 2020-05

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