LED Lighting Drivers LED Driver 78W TRIAC Dimmable

High Performance, Combined Driver, Controller, Switch :The LYT4218 enables off-line LED drivers with high power factor which easily meet international requirements for THD and harmonics. Output current is tightly regulated with better than ±5% CC tolerance1 . Efficiency of up to 92% is easily achieved in typical applications.Supports a Wide Selection of TRIAC Dimmers: The LYT4218 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.Low Solution Cost and Long Lifetime: LYT4218 is highly integrated and employ a primary-side control technique that eliminates the opto isolator and reduces component count. This allows the use of low-cost single-sided printed circuit boards. Combining PFC and CC functions into a single-stage also helps reduce cost and increase efficiency. The 132 kHz switching frequency permits the use of small, low-cost magnetic.

• Better than ±5% CC regulation
• TRIAC dimmable to less than 5% output
• Fast start-up
  • <250 ms at full brightness
  • <1s at 10% brightness
• High power factor >0.9
• Easily meets EN61000-3-2
  • Less than 10% THD in optimized designs
• Up to 92% efficient
• 132 kHz switching frequency for small magnetics