Analysis and reduction method of conducted noise in GaN HEMTs based totem-pole bridgeless PFC converter

Totem-pole bridgeless PFC converter is proposed to pursuit better efficiency as it reduces the loss added by the diode bridge. However, the conducted noise performance of totem-pole bridgeless PFC converter is unsatisfactory as the spike current occurs at input voltage zero-crossing and causes severe common mode noise. In this paper, the noise mechanism at zero-crossing of the converter is discussed and a noise reduction method is proposed. Finally, the experiments have been achieved under the condition: 230V ac input, 390V dc output and 50kHz switching frequency, and the effectiveness of the proposed noise reduction method is verified.