Highly-efficient new LYTSwitch-5 ICs support multiple LED driver topologies

26-01-2016 | Power Integrations | Power

Power Integrations has unveiled the LYTSwitch-5, a single-stage LED driver
IC family of devices which combine PFC and constant-current output, and
support multiple common LED driver topologies.

Solid-state lighting applications have highly variable driver requirements,
and power engineers are often challenged to develop optimized designs
quickly in response to requests from lighting designers. The LYTSwitch-5
family supports the safety-rated isolated fly-back topology for ballast
applications, and non-isolated topologies such as buck and buck-boost for
low-cost lamps and bulbs. Additionally, a choice of low-side or high-side
switching enables designers to optimize for low EMI or for reduced inductor
complexity. By achieving over 90% efficiency, 0.9PF, less than 5% THD and
+/-3% current regulation accuracy over line, load, production variance,
temperature and multiple topologies, LYTSwitch-5 is the best LED driver for
solid-state lighting applications below 25W.

The high efficiency of LYTSwitch-5 LED driver designs results in smaller
heatsinks, more compact implementations and increased lifetime. Highly
accurate CC regulation reduces the degree of overdesign required to
guarantee compliance to lumen output standards from regulatory bodies such
as the California Energy Commission (CEC) and ENERGY STAR. To optimize
surge-withstand performance for a variety of product types and geographical
installations, 650V and 725V MOSFET options are available.

Commenting, Hubertus Notohamiprodjo, product marketing director, Power
Integrations, said: “LYTSwitch-5 ICs suit multiple applications including
tubes, down-lights and high- and low-bay ballasts. The simple designs and
low component count enabled by these new ICs result in compact, reliable,
high-performance driver circuits and a platform-based design approach with
increased manufacturing throughput.”

LYTSwitch-5 LED driver ICs offer up to 25W, an extended universal input
range (90 - 308VAC) and wide output voltage range (2:1). Protection features
include thermal fold-back with end-stop shutdown, short-circuit protection,
input and output OVP, overcurrent protection and safe brown-in and

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