Power converter with reduced power consumption and method of operating the same

A power converter with reduced power consumption, configured to receive an input voltage and provide an output voltage to supply power to a load, the power converter comprising:

• a power factor correction circuit, comprising at least one inductor, at least one power switch, and an output capacitor, and configured to receive the input voltage,
• a driver circuit, coupled to the at least one power switch, and
• a controller, coupled to the driver circuit, and configured to provide a PWM signal to the driver circuit;
• wherein the driver circuit drives the switching of the at least one power switch based on the PWM signal so as to control the power factor correction circuit to convert the input voltage into the output voltage,
• wherein when the controller determines that an effective value of an input current of the power factor correction circuit is correspondingly lower than a current lower limit, a specific time period starts based on the output voltage reaching a voltage lower limit, and the specific time period ends based on the output voltage reaching a voltage upper limit;
• in the specific time period, the controller enables the driver circuit based on the input current being correspondingly greater than a predetermined threshold so as to operate the switching of the at least one power switch through the PWM signal.