The invention provides a device for stabilizing an effective value of an output current of a converter. The device comprises the following: an input to receive an input voltage x of the converter, a memory in which a first set of polynomial coefficients a, b, c; kj is stored, a processor that is coupled to the input and the memory and is set up so as to determine a current correction y as a polynomial function with the stored first set of polynomial coefficients a, b, c; kj as a function of the received input voltage x, and a power stage that is coupled to the processor to receive the current correction y and set up to modify the effective value of the output current as a function of the current correction y.