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	Board not Stocked
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%, 120V in, No Dimmer, 40V @ 19 W
Features	Dimming Control PFC
Switching Frequency	1 MHz
Component Count + Extras	76 + 2
Design Author	STMicroelectronics
Application / Target Market	Lighting: 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