An Interleaved Boost Power Factor Corrector with Average Current Control for Off-Line Power Supplies

摘要

An interleaved boost power-factor corrector (PFC) with average current control is studied in this paper. It comprises two interleaved boost circuits connected in parallel and operated with average current control. The interleaved operation reduces the input current and output current ripples and also improves the circuit efficiency at light load condition. This paper analyzes the interleaved PFC pre-regulator and implements a 1.2kW prototype with a ready-made commercial integrated circuit UCC28070. Experimental results demonstrate the analysis and design of this paper.