Single-phase Power Factor Corrector Circuit with Digital Control

Digital controlled single-phase boost mode power factor corrector with average current control was presented.Power circuit,signal conditioning circuit and driving circuit were analyzed.Fixed point DSP was the controller core.The gain of three analog sampling circuit and multiplier obtained method,the flow of input voltage feed forward,PWM signal generation,soft start,A/D converter,and the algorithm of PI and PWM duty were fully investigated.The simulation waveforms verified the correction of theory and design.