Design Procedure for Mitigating Current Distortion in Boost PFC Converters Utilizing PCMC Under Light-Load Conditions

This paper proposes a design procedure to mitigate the current distortion of boost Power Factor Correction converter based on Predictive Current Mode Control. When PCMC is applied, distortion inevitably appears in the inductor current due to the influences of input voltage and duty cycle. Especially under light load conditions, the current ripple becomes relatively large compared to the inductor current, which aggravates current distortion. To determine the main causes of the current distortion, this paper mathematically analyzes the distortion and proposes a design procedure for a boost PFC converter to alleviate it.