A method of controlling a power factor correction circuit, the power factor correction circuit and control unit for a lighting means

When controlling a power factor correction circuit control steps are carried out in dependence of at least one control parameter. A measured variable (65) is detected in the power factor correction circuit. The at least one control parameter is selectively changed depending on the detected physical quantity (65), for example, when the measurement variable (65) reaches a first threshold value (61). By changing the at least one control parameter, a faster or slower control response can be achieved. The amended at least one control parameter is used in at least one control step.