A method of enhancing a power factor during a half-line cycle of a power factor correction (PFC) converter includes generating an input voltage signal representative of a value of an input voltage of the PFC converter. A variable multiplication factor is adjusted to be greater than one for a first part of the half-line cycle and less than one for a second part of the half-line cycle. A pre-distortion signal is generated to be representative of the value of the input voltage of the PFC converter times the variable multiplication factor. An input current of the PFC converter is sensed. A first signal is generated in response to a sensed input current of the PFC converter multiplied by the pre-distortion signal. An on-time of a switch of the PFC converter is ended in response to the first signal.