PFC circuit and method for operating a PFC circuit

摘要

The invention relates to a PFC circuit (1) and a method for operating a PFC circuit (1) with the method steps: application (S1) of a supply voltage (Vin); Comparing (S2) an output value (VBus) of the PFC circuit (1) with a first threshold value (TH2); and turning on (S3) a PFC switching signal (CLK) to a switching element (1) of the PFC circuit (1) to start (S4) the power factor correction in case the output value (VBus) of the PFC circuit (1) is above of the first threshold (TH2).