抄録
A power factor corrected (PFC) boost converter with discontinuous current mode (DCM) operation can decrease the total harmonic distortion with simple circuit and easy control method. However, the PFC converter must be tumed off at maximum inductor current and the distortion in the input current increases with low ratio of output voltage to input voltage. To reduce the switching losses and EMI noise, a soft switching circuit for the PFC converter is proposed in this paper. A simple control method to improve the input current waveform in low ratio of output voltage to input voltage is suggested for practical use.
