Patent ID: 7898188

Claim:
An arrangement comprising: a voltage converter for supplying power to an electrical load, the voltage converter comprising: an input to receive an input voltage; an output electrically connected to a series circuit comprising the electrical load and a current sink; wherein the voltage converter is configured to generate an output voltage at the output that is dependent on the input voltage and on a first multiplication factor; and wherein the series circuit is electrically connected to a reference potential; a prediction unit comprising: a first sampling input for receiving a signal derived from the input voltage; wherein the prediction unit is configured to determine a predicted current sink voltage based on a second multiplication factor obtained from a set of selectable values, based on a load voltage across the electrical load, based on a correction voltage for the voltage converter, and based on the signal derived from the input voltage; and a comparator electrically connected to the prediction unit for receiving the predicted current sink voltage, the comparator comprising an output electrically connected to a control input of the voltage converter, the comparator being configured to compare the predicted current sink voltage with a predetermined threshold value and to output the second multiplication factor to the voltage converter if the predicted current sink voltage exceeds the predetermined threshold value.