POWER INTEGRATIONS LYT4227E Datasheet & Stock

LYTSwitch™-4 is a single-stage accurate primary-side constant current (CC) controller with PFC for high-line applications with TRIAC dimming and non-dimming options. LYTSwitch-4 ICs are highly integrated and employ a primary-side control technique that eliminates the optoisolator 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 132KHz switching frequency permits the use of small, low cost magnetics. LED drivers using the LYTSwitch-4 family do not use primary side aluminium electrolytic bulk capacitors. This means greatly extended driver lifetime, especially in bulb and other high temperature applications. LYTSwitch-4 family provides excellent turn-on characteristics for leading-edge and trailing-edge TRIAC dimming applications.




Minimum output power of 19W at CBP = 47µF and 50W at CBP = 4.7µF

Better than ±5% CC regulation, TRIAC dimmable to less than 5% output

Fast start-up,

High power factor >0.9, up to 92% efficient

Easily meets EN61000-3-2, less than 10% THD in optimized designs

132KHz switching frequency for small magnetics

High performance, combined driver, controller, switch

Enables LED drivers with high PF which easily meet international requirements for THD/harmonics

Output current is tightly regulated with better than ±5% CC tolerance

Supports a wide selection of TRIAC dimmers




Warnings
Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.