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STEVAL-ILL016V2: 350mA, 700mA, 1A @ 40V Max, TRIAC

Summary

This application note presents a low-cost driver for LEDs that is compatible with TRIAC phase-control dimmers. The design gives luminaire manufacturers a low-cost, commonly available dimming option for home fixtures. A side benefit is that, when not wired to a dimmer, the unit's power factor is over 0.9. The design is based on the L6562A transitionmode PFC controller driving a single stage PFC-flyback power converter.

An STMicroelectronics Patent Application is pending for the method for dimming an offline LED driver by means of a TRIAC based dimmer as described in this document.

Specifications

Manufacturer STMicroelectronics
Category Lighting
Sub-Category LED Drivers - AC / Offline
Eval Board Part Number 497-10368-ND
Eval Board Supplier STMicroelectronics
Eval Board Normally In Stock
AC Voltage 115 V
Outputs and Type 1 Isolated
Current Out 350 mA
700 mA
1 A
Voltage Out (Max) 40 V
Efficiency @ Conditions >82%, 120 Vin, No Dimmer, 40V @ 19 W
Features Dimming Control
PFC
Switching Frequency 1 MHz
Component Count + Extras 76 + 2
Design Author STMicroelectronics
Application / Target Market LED Home Lighting
Voltage In 96 ~ 132 VAC
Power Factor
Standard(s)
Main I.C. Base Part L6562A
TSM1052
Date Created By Author 2010-09
Date Added To Library 2011-03

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