A power converter system (100) comprises a power converter (102), an analyzing circuit (114) and a power converter controller (110). The power converter (102) receives a mains voltage (108) and provides power (104) to a signal processing circuit (106). The power converter (102) is configured for operating in either a first mode wherein the power converter (102) is able to supply a first power level, or in a second mode wherein the power converter (102) is able to supply a second power level. The second power level exceeds the first power level. The signal processing circuit (106) processes a signal (116) in a normal operational mode. The analyzing circuit (114) analyzes the signal (116). The analyzing circuit (114) generates a power signal (112) that indicates a power consumption of the signal processing circuit (106) in normal operation. The power converter controller (110) receives the power signal (112) and controls the power converter (102) to operate in the first mode or in the second mode. The power converter (102) is controlled to operate in the first mode only when the power signal (112) indicates that the power consumption of the signal processing circuit (106) is below the first power level.
