Safety-isolated 110W LED-driver ICs target smart-lighting applications

September 05, 2019 //By Julien Happich
LED-driver
Aimed at smart-lighting, Power Integrations’ LYTSwitch-6 family of safety-isolated LED-driver ICs support designs that deliver up to 110W with 94% conversion efficiency using a simple, flexible flyback topology.

The high efficiency of the new LYTSwitch-6 ICs eliminates the need for heatsinks – greatly reducing ballast size, weight and cooling airflow requirements. The 750V PowiGaN primary switches provide very low RDS(ON) and reduced switching losses. This improvement, combined with existing LYTSwitch-6 features, increases power conversion efficiency by up to 3% compared to conventional solutions, claims the manufacturer, reducing wasted heat by more than one-third.

LYTSwitch-6 ICs with PowiGaN technology employ lossless current sensing, which contributes to the higher efficiency. The new family members retain existing LYTSwitch-6 benefits such as fast transient response, which facilitates excellent cross regulation for parallel LED strings without the need for additional regulator hardware, and flicker-free system operation. This allows simple implementation of a pulse-width-modulation (PWM) dimming interface. A reference design (DER-801) describing a 100 W 3-way dimming LED ballast is available for download from the Power Integrations website.

Power Integrations - www.power.com


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