Patent ID: 8779672

Claim:
A driver circuit for light-emitting diodes, comprising: a first input, at which a first supply voltage is present; a second input, at which a second supply voltage is present; a first current supply unit, which is selectively coupled to the first or the second input as a function of at least one first control signal; at least one second current supply unit, which is selectively coupled to the first or second input as a function of at least one second control signal; a control unit, that is connected to the first current supply unit and to the at least one second current supply unit for respective control thereof, and which is designed to provide the at least one first and the at least one second control signal; a first output coupled to the first current supply unit to provide a first current for at least one first light-emitting diode; and at least one second output coupled to the at least one second current supply unit to provide a second current for at least one second light-emitting diode, wherein the first and the at least one second current supply unit respectively comprise: a controlled current source, to which the first or second supply voltage is fed and which is designed to provide the associated first or second current; and a comparator that is coupled to the respectively associated controlled current source and is designed to provide a respective operating state signal as a function of the associated first or second current and of an associated activation signal, the comparator corresponding to a current comparator.