LED driver ICs reduce complexity in bulbs, tubes and ballasts up to 22W

June 17, 2016 // By Julien Happich
Power Integration's LYTSwitch-1 single-stage, non-isolated, buck topology LED driver IC family enables the design of LED bulbs and tubes with high constant-current accuracy while using a minimum number of components.

A novel driver algorithm ensures high power factor (PF) and low total harmonic distortion (THD) while maintaining very high efficiency. Housed in a compact SO-8 package, the chips offer an efficiency greater than 93% with a PF of over 0.9 and THD as low as 15%. Devices can be used in a low-side buck topology for reduced EMI or in a high-side buck topology which simplifies design. Delivering up to 22 W without a heatsink, the universal input (100 - 308 VAC) ICs incorporate a 725 V MOSFET for high reliability. Designers can make use of small, off-the-shelf inductors due to a unique peak current control algorithm. The new devices meet all applicable international standards including: DOE 6 (external power supply), CEC Title 20 and 24, ENERGY STAR® SSL, EN61000-3-2 (C) plus China and India standards.

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