TRIAC-dimmable LYTSwitch-7 LED driver slashes BOM count

August 08, 2016 // By Julien Happich
Power Integrations' LYTSwitch-7 single-stage, non-isolated, TRIAC-dimmable, buck topology LED driver IC is capable of delivering up to 22 watts without a heatsink in a very small SO-8 footprint.

LYTSwitch-7 designs do not require bleeders; employing simple, passive damping for TRIAC management and an off-the-shelf, single-winding inductor, reducing component count to just 20, as compared to approximately 35 parts for typical dimmable LED driver boards.

The chips deliver a phase-cut (TRIAC) dimming solution with a wide dimming range and monotonic dimming response. The LED drivers enable efficiency of greater than 86% - around 2% higher than conventional dimmable products according to the manufacturer, with high PF, accurate regulation and comprehensive protection.

Protection features include thermal foldback with end-stop shutdown, which protects the IC, driver and fixture at abnormally-high ambient temperatures by automatically reducing the current flow and dimming the lamp.

The ICs meet international standards including: DOE Level 6 (external power supply), CEC Titles 20 and 24, ENERGY STAR® Lamps Program Requirements Version 2.0, NEMA SSL-7A and EN61000-3-2 (C&D).

Visit Power Integrations at  www.power.com/lytswitch-7