Patent ID: 11929669

Abstract:
The present disclosure relates to a totem pole bridgeless power factor correction device and a power supply system. The device includes a power factor correction module. The power factor correction module includes a first transistor, a second transistor, a third transistor, a fourth transistor, an inductor and a control module for generating a zeroth control signal in the first time period to control the third transistor and the fourth transistor to be in an off state, performing a zero-crossing detection on an AC voltage in the first time period, generating a first control signal to control a conduction state of the first transistor and the second transistor before the AC voltage crosses zero, and generating a second control signal to control the conduction state of the first transistor and the second transistor after the AC voltage crosses zero. The embodiments of the present disclosure can enable the device to smoothly transition the current when the device is at the zero-crossing point, and improve the stability and efficiency of the device.