Synchronous converter designed as a synchronous flyback converter, comprising a transformer having a predetermined winding ratio, which couples together a supply side and a load side of the synchronous converter , which are each assigned limiting currents (15', 15", 24', 24"); a first switching device controlled with a first, pulse-width-modulated control signal , wherein the first control signal is configured to be active in a first time span (t1 - t2) of a periodic operating cycle of the synchronous converter in order to close the first switching device and, in this time span, to enable a flow of a current on one side from the supply side and the load side ; on the load side , a filter capacitor and a second switching device controlled with a second, pulse-width-modulated control signal , wherein the second control signal is configured to be active in a second time span (t3 - t4) of the periodic operating cycle of the synchronous converter in order to close the second switching device in this time span and to enable a flow of a current on another side from the supply side and the load side ; detection means which are configured to detect a current on one side from the supply side and the load side ; conversion means , which are configured to provide the limiting currents (24', 24") of the other side from the supply side and from the load side , converted via the predetermined winding ratio, as corresponding limiting currents (15*, 15**) on the one side ; and comparison means , which are configured to compare the detected current to the limiting currents (15', 15") of the one side and to the corresponding limiting currents (15*, 15**) on the one side . a transformer having a predetermined winding ratio, which couples together a supply side and a load side of the synchronous converter , which are each assigned limiting currents (15', 15", 24', 24"); a first switching device controlled with a first, pulse-width-modulated control signal , wherein the first control signal is configured to be active in a first time span (t1 - t2) of a periodic operating cycle of the synchronous converter in order to close the first switching device and, in this time span, to enable a flow of a current on one side from the supply side and the load side ; on the load side , a filter capacitor and a second switching device controlled with a second, pulse-width-modulated control signal , wherein the second control signal is configured to be active in a second time span (t3 - t4) of the periodic operating cycle of the synchronous converter in order to close the second switching device in this time span and to enable a flow of a current on another side from the supply side and the load side ; detection means which are configured to detect a current on one side from the supply side and the load side ; conversion means , which are configured to provide the limiting currents (24', 24") of the other side from the supply side and from the load side , converted via the predetermined winding ratio, as corresponding limiting currents (15*, 15**) on the one side ; and comparison means , which are configured to compare the detected current to the limiting currents (15', 15") of the one side and to the corresponding limiting currents (15*, 15**) on the one side . <EOS>