ELECTRONIC CONVERTER AND RELATED LIGHTING SYSTEM

There is described an electronic converter (10) comprising a switching stage (112), a transformer (T), a measurement circuit (132) and a driver circuit (118). The transformer (T) includes a magnetization inductance (L), whereby the current () flowing through the primary winding (T1) corresponds to the sum of the magnetization current and of a current () which is proportional to the current () flowing through the secondary winding (T2) of the transformer (T). The measurement circuit (132) determines a measurement signalindicative of the current () flowing through the secondary winding (T2) of the transformer (T). The driver circuit (118) drives () the switching stage (112) as a function of said measurement signal ()Specifically, the driver circuit (118) is configured to:- during a first interval, apply a positive voltage to the primary winding (T1), whereby the magnetization current () increases substantially linearly, and- during a second interval, apply a negative voltage to the primary winding (T1), whereby the magnetization current () decreases substantially linearly.Specifically, the measurement circuit (132) comprises an inductive element (L) connected in series with the primary winding (T1), wherein the inductive element (L) supplies a first voltage () proportional to the derivative of current () flowing through the inductive element (L), whereby the first voltage () includes a first offset during the first interval and a second offset during the second interval. The measurement circuit (132) moreover comprises an offset cancellation circuit (R1, R2,configured to generate a second voltage () by cancelling the first and/or the second offset from the first voltageand an analog integrator (RF, CF) configured to generate the measurement signal () by integrating the second voltage ()