Patent ID: 6919649

Claim:
A power supply device for provision of a supply current for electrical loads which can be operated at a rated voltage, comprising a power generating circuit which is supplied with a predetermined voltage that is not the same as the rated voltage and to which a control signal is input, in order to provide the supply current for the electrical loads as a function of the control signal, a regulator to which a reference signal, which corresponds to a predetermined reference variable, and a regulation signal, which corresponds to the supply current that is provided, are input, in order to provide the control signal with a control signal component which varies linearly with an input signal difference of the regulator, and a reference device for provision of the reference signal, wherein the power supply device provides a normal state in which the supply current is provided for the electrical loads which are operated at the rated voltage and the input signal difference of the regulator is zero, and wherein the regulator provides a regulation characteristic such that, starting from the normal state, a sudden reduction in the operating voltage for the electrical loads from the rated voltage to a rated minimum voltage which is necessary for operation of the loads leads to a rise in the supply current by at least 20% of the maximum supply current which can be provided by means of the power generating circuit.