Power factor correction circuit and driver comprising the power factor correction circuit

The present invention relates to a power factor correction circuit and a driver comprising the power factor correction circuit. The power factor correction circuit comprises: a rectifier bridge; a switch converter circuit having an input terminal in connection with an output terminal of the rectifier bridge; a load in connection with an output terminal of the switch converter circuit; a controller having a control terminal and a feedback terminal, the control terminal being in connection with a controlled terminal of the switch converter circuit, characterized by further comprising a first feedback loop and a second feedback loop that are in connection with a sample terminal of the switch converter circuit, the first feedback loop and the second feedback loop being such configured that the feedback terminal of the controller only receives a first feedback signal generated by the first feedback loop in a normal operation state of the power factor correction circuit, and the feedback terminal of the controller only receives a second feedback signal generated by the second feedback loop in a start-up state of the power factor correction circuit, and a bandwidth of the second feedback loop is greater than a bandwidth of the first feedback loop.