Power factor controller circuit

摘要

A power factor controller circuit (10) includes a switched inductor arrangement (30) coupled to a rectified voltage input (20), for providing an output voltage (40). A control circuit (35) switches the switched inductor arrangement (30) according to a control input. A feedback path (50) is arranged to compare a portion of the output voltage with a sensed parameter of the input voltage and to add a weighted fixed voltage (65), in order to provide an error voltage to the control input.