A switch control circuit for controlling a bridge circuit comprising: an upper and a lower transistor, connected to a positive and a negative voltage, respectively, and comprising a flywheel diode connected in parallel with each transistor. An LC-circuit filters the voltage from the junction of the transistors. A drive circuit controls each transistor in order to switch off the corresponding switch element when a reference current has been obtained in the inductor and for switching on the corresponding switch element when the current in the inductor is essentially zero. A first timer circuit is arranged for preventing the on-switch of the switch element until a minimum time period has passed.