In summary, the LT3799 is an offline, isolated, flyback LED controller with an input range of 90VAC to 265VAC and active power factor correction, specifically designed for driving LEDs. The LT3799 is compatible with standard TRIAC in-wall dimmers. A unique current sensing scheme delivers a well regulated (±5%) current to the secondary side without using an optocoupler, enhancing performance while reducing cost. With open and shorted LED protection, the LT3799 also improves reliability. The single stage PFC regulator design requires minimal external components and offers very low levels of harmonic distortion.