Power Integrations has introduced a single-stage, non-isolated, buck topology LED driver IC family that enables the design of LED bulbs and tubes with high constant-current accuracy while using a minimum number of components.

Housed in a compact SO-8 package, LYTSwitch-1 ICs are greater than 93% efficient 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 22W without a heatsink, the universal input (100-308 VAC) ICs incorporate a 725V 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.

LYTSwitch-1 Figure 1: High PF, low THD LED driver ICs set a new standard in efficiency.

"The low component and compact size make these LED driver ICs easy to fit into space-challenged applications such as tube end caps, small form factor candles and GU10 bulbs, as well as low cost A19 and decorative-filament lamps," said Hubie Notohamiprodjo, director of product marketing at Power Integrations.

LYTSwitch-1 LED driver ICs have a host of protection features including thermal foldback with end-stop shutdown, short circuit protection, input and output OVP, overcurrent and SOA protection.

LYTSwitch-1 IC samples are available now. Devices are priced at $0.26 in 10,000-piece quantities.