PFC DCM DCM REGION INPUT VOLTAGE EXPANSION CONTROL DEVICE AND CONTROL METHOD

摘要

In order to solve the problem of correcting the power factor of the input current with the instantaneous value of the input voltage, the present invention suppresses the conversion of the input current into the CCM region due to the rise of the input voltage when the boost PFC is controlled in the DCM region And to provide a control device and a control method that can prevent damage and breakage of an electric circuit caused by operation of an input current in a CCM mode in advance. According to the control method and control method of DCM region input voltage of the boost PFC according to the present invention, it is possible to prevent the input overcurrent from occurring even if the input voltage increases beyond DCM and CCM boundary regions in the DCM control boost PFC, It is possible to protect the life-span reduction and breakage due to the damage of the electric circuit.