STEVAL-ILL026V1: 3W, 350mA @ 10V Max, 110/230V

Summary

This application note describes the functioning of the STEVAL-ILL026V1 non-isolated 3 W offline LED driver power supply designed using the VIPER22A-E low power offline SMPS primary switcher from STMicroelectronics. The circuit regulates the load current to 350 mA and generates about 10 V. The load is composed of three high-brightness (HB) LEDs, connected in series.

The project does not provide safety isolation between the input and output.

This document provides the power supply specification, circuit diagrams, the complete bill of materials, and reports the results of circuit testing.

EN55015 & EN6100-3-2 compliant.

Specifications

Manufacturer	STMicroelectronics
Category	Lighting
Sub-Category	LED Drivers - AC / Offline
Eval Board Part Number	497-9049-ND
Eval Board Supplier	STMicroelectronics
Eval Board	Board not Stocked
AC Voltage	115 V 230 V Universal
Outputs and Type	1 Non-Isolated
Current Out	350 mA
Voltage Out (Max)	10 V
Efficiency @ Conditions	>69%, 115V in, 3 LEDs @ 350 mA >60%, 230V in, 3 LEDs @ 350 mA
Features	Light Load Mode Open Circuit Protection Short Circuit Protection Thermal Protection Under Voltage Protection, Brown-Out Zero Load Regulation
Switching Frequency	60 kHz
Component Count + Extras	22 + 2
Design Author	STMicroelectronics
Application / Target Market	Lighting: LED Home Lighting
Voltage In	90 ~ 265 VAC
Power Factor
Standard(s)
Main I.C. Base Part	VIPer22A
Date Created By Author	2009-11
Date Added To Library	2011-04