LYT4326E3 (POWER INTEGRATIONS)

The LYT4326E3 is a LYTSwitch-4 high power LED Driver IC with high power factor which easily meet international requirements for THD and harmonics. Output current is tightly regulated with better than ±5% CC tolerance. Efficiency of up to 92% is easily achieved in typical applications. The LYTSwitch-4 family provides excellent turn-ON characteristics for leading-edge and trailing-edge TRIAC dimming applications. This results in drivers with a wide dimming range and fast start-up, even when turning on from a low conduction angle-large dimming ratio and low pop-on current. The LYTSwitch-4 IC is highly integrated and employs a primary-side control technique that eliminates the optoisolator and reduces component count. This allows the use of single-sided printed circuit boards. Combining PFC and CC functions into a single-stage also helps reduce cost and increase efficiency. The 132kHz switching frequency permits the use of small magnetics.