The a3131 is a universal DSP-based PFC solution with Switching-mode Power Supply to be used in applications requiring power factor values close to unity and highly efficient DC power supply. Typical application areas for the a3131 are high-power DC motor controllers and lighting systems. The power factor controller (PFC) is based on the boost topology and is fully software-controlled. The PFC algorithm is loaded from an on-chip non-volatile memory for stand-alone operation or can be uploaded to the DSP core using a two-wire interface.