CRD1500-FB [Cirrus Logic]

The CRD1500-FB circuit has two stages: a digitally controlled front-end PFC and a quasi-resonant flyback converter. The CS1500 is a high-performance power factor correction (PFC) controller for universal AC input that uses a proprietary digital algorithm with variable on-time, variable frequency, & DCM, which ensures unity power factor. The quasi-resonant flyback converter uses the L6566A flyback controller and controls the circuit's standby/normal operation mode via a dedicated pin (Vcc_PFC), achieving excellent efficiency at light-load and no-load conditions.