Patent ID: 8207684

Claim:
A Buck converter for providing a current for at least one light emitting diode, the Buck converter comprising: an input with a first input connection and a second input connection for connecting a DC voltage source; an output with a first output connection and a second output connection for connecting the at least one light emitting diode; and a Buck diode, a Buck inductor and a Buck main switch, which has a control electrode, a working electrode and a reference electrode; wherein the Buck diode and the Buck main switch are coupled in series between the first input connection and the second input connection, wherein the Buck inductor is coupled between the connecting point for the Buck diode and the Buck main switch, on the one hand, and the first output connection, on the other hand, wherein the Buck converter further comprises: a first auxiliary switch which is supplied with a first voltage which is correlated to the current provided for the at least one light emitting diode; and a second auxiliary switch which is supplied with a second voltage which is correlated to the current provided for the at least one light emitting diode, wherein the first auxiliary switch and the second auxiliary switch are coupled to the Buck main switch such that the first voltage stipulates the switch-off time for the Buck main switch and the second voltage stipulates the switch-on time for the Buck main switch.