Intersil’s ISL6730A active power factor correction (PFC) controller delivers minimal harmonic distortion (THD) and high power factor, says the company. The device’s patent-pending breakthrough in negative capacitance technology reduces electromagnetic interference (EMI) filter size, improves THD and power factor, and provides maximum efficiency over a wide input supply range and output power (input voltages from 85 to 270 V ac and power range from 50 W to 2 kW). It also minimizes zero crossing distortion, compensates for input filter capacitance power factor displacement error, and reduces the magnetic component size by up to 66%. The device’s PFC capability is compatible with the requirements for a power factor higher than 0.9, as currently required by Energy Star Program Requirements for Computers Version 5.0. The ISL6730A also achieves excellent light load efficiency using integrated skip-mode and includes an internally clamped 12.5-V gate driver delivering 1.5-A peak current to the external power MOSFET.