Circuit arrangement for operating at least one LED comprising - an input comprising a first input connection and a second input connection for coupling to a supply voltage (U Zw); - an output comprising a first output connection and a second output connection for providing a DC output voltage (U out) to the at least one LED; - an inverter comprising a bridge circuit comprising at least one first electronic switch and one second electronic switch, wherein the first electronic switch and the second electronic switch each comprise a control electrode, a reference electrode and a working electrode, wherein the first electronic switch and the second electronic switch are coupled in series between the first input connection and the second input connection so as to form a first bridge centre point; - a first inductance, which is coupled in series between the first bridge centre point and one of the output connections (A1; A2); and - an actuation circuit comprising at least one first output connection and one second output connection, wherein the first output connection is coupled to the control electrode of the first electronic switch and the second output connection is coupled to the control electrode of the second electronic switch; wherein the actuation circuit comprises a first control apparatus (L2, 10, D5) and a second control apparatus (L3, 12, D2), wherein the first control apparatus (L2, 10, D5) comprises a second inductance, which is magnetically coupled to the first inductance, and wherein the second control apparatus (L3, 12, D2) comprises a third inductance, which is magnetically coupled to the first inductance, wherein a first switch-off apparatus is coupled between the second inductance and the first electronic switch, said first switch-off apparatus being designed to turn the first electronic switch off when the current (I Pv1) through the first electronic switch has reached a presettable maximum value (I max1), wherein the circuit arrangement is characterized in that the at least one switch-off apparatus (10; 12) comprises a respective current-measuring apparatus (R1; R2) for measuring the current (I Pv1; I Pv2) through the respective electronic switch (V1; V2), as well as a respective thyristor simulator (14; 16) comprising a switch-on input (E T) and a switch-off input (A T), wherein the switch-on input (E T) is coupled to the respective current-measuring apparatus (R1; R2) and the switch-off input (A T) is coupled to the respective inductance (L2; L3). - an input comprising a first input connection and a second input connection for coupling to a supply voltage (U Zw); - an output comprising a first output connection and a second output connection for providing a DC output voltage (U out) to the at least one LED; - an inverter comprising a bridge circuit comprising at least one first electronic switch and one second electronic switch, wherein the first electronic switch and the second electronic switch each comprise a control electrode, a reference electrode and a working electrode, wherein the first electronic switch and the second electronic switch are coupled in series between the first input connection and the second input connection so as to form a first bridge centre point; - a first inductance, which is coupled in series between the first bridge centre point and one of the output connections (A1; A2); and - an actuation circuit comprising at least one first output connection and one second output connection, wherein the first output connection is coupled to the control electrode of the first electronic switch and the second output connection is coupled to the control electrode of the second electronic switch;