The PowiGaN-based LYT6078C IC incorporates a 750V power switch and provides flicker-free output up to 90W, while other members of the family provide up to 110W. Including both the PFC stage and the LED driver of the LYTSwitch-6, the system efficiency exceeds 90%. Housed in the miniature InSOP-24 surface-mount package, the LYTSwitch-6 ICs are protected by an advanced thermal folding system, which reduces output power to limit device temperature under abnormal conditions while still providing light output. The LYTSwitch-6 ICs also incorporate Power Integrations' FluxLink™ communication technology, which enables secondary-side control without the need for an optocoupler and provides better than ±3% CV and DC regulation across the entire line, load, temperature, and manufacturing process. All LYTSwitch-6 integrated circuits exhibit fast transient response and readily support pulse width modulation (PWM) regulation.

The performance benefits of the LYT6078C are evident in a new design report (DER-920) detailing a two-stage PFC boost plus an isolated flyback transformer in a dimmable LED ballast. It employs the LYTSwitch-6 LYT6078C IC and the Power Integrations HiperPFSTM-4 PFS7624C driver and delivers peak efficiency of over 91% when driving a 48V, 1350mA LED strip from a 220VAC to 277VAC input. In standby mode, the system's power consumption is less than 80mW, giving engineers substantial flexibility when designing lighting controls, particularly dimming circuitry.

Hubie Notohamiprodjo, Director of Marketing for LED Lighting Products, states: "Power Integrations' new PowiGaN-based LYTSwitch-6 integrated circuits save lighting manufacturers space and system costs for smart lighting power supplies. The company's key design objectives for our latest design brief were high power factor, low harmonics, high efficiency, and 3-in-1 regulation with zero to 100% output current. The new LYT6078C driver IC, combined with our HiperPFS-4 PFC controller, easily met these challenges.".

You can find the DER-920 technical support and design report here.