SWITCHING REGULATOR AND OPERATING DEVICE FOR OPERATING ILLUMINANTS

The invention relates to a switching regulator for operating one or more illuminants, comprising a control circuit (4) for outputting a digital setpoint value (IpeakD) for driving a switch (5) of the switching regulator (3), said switch being coupled to a coil (6), means (11) for directly or indirectly detecting the current flowing through the coil (6) or the switch (5) and for generating a first analog signal (ISNS) representing said current, a digital-to-analog converter (14) designed to output a second analog signal on the basis of the digital setpoint value (IpeakD) output by the control circuit (4), and a comparator (13) designed to compare the first analog signal (ISNS) with the second analog signal (Ipeak), wherein the resolution of the digital setpoint value (IpeakD) output by the control circuit (4) is higher than the resolution of the digital-to-analog converter, and the switching regulator additionally comprises a regulating device (15) designed to vary the digital input value of the digital-to-analog converter over time in order to counteract the error that occurs as a result of the lower resolution of the digital input value by comparison with the digital setpoint value (IpeakD) on average over time.