FAN9673 CCM PFC Controller onsemi FAN9673 is an interleaved three-channel Continuous Conduction Mode (CCM) Power Factor Correction (PFC) controller IC intended for PFC pre-regulators. The FAN9673 enables the design of a power supply that fully complies with the IEC1000-3-2 specification by incorporating circuits for the implementation of leading edge, average current, and 'boost'-type power factor correction. Interleaved operation provides substantial reduction in the input and output ripple currents and the conducted EMI filtering becomes easier and cost effective.