A power supply circuit comprising: - at least a first (12 1) and a second (12 2) current generator, and - for each of said first (12 1) and said second (12 2) current generator, a positive 102a 1, 102a 2) and a negative (102b 1, 102b 2) terminal adapted to be connected to one or more lighting modules, wherein each current generator (12 1, 12 2) is implemented with an electronic converter comprising: a) a switching stage comprising one or more electronic switches and one or more inductors, wherein an output of said switching stage is connected to the positive (102a 1, 102a 2) and negative (102b 1, 102b 2) terminal of the respective current generator (12 1, 12 2), b) a low-side current sensor configured to generate a feedback signal ( FB 1, FB 2) indicative of a current received via the negative (102b 1, 102b 2) terminal of the respective current generator (12 1, 12 2), and c) a regulator circuit configured to drive said one or more electronic switches of said switching stage as a function of the feedback signal ( FB 1, FB 2) of the respective current generator (12 1, 12 2); characterized in that said power supply circuit comprises a control circuit configured for: - activating said first current generator (12 1) and maintaining deactivated said second current generator (12 2), - while said first current generator (12 1) is activated and said second current generator (12 2) is deactivated, monitoring the feedback signal ( FB 2) of said second current generator (12 2), - verifying whether said feedback signal ( FB 2) of said second current generator (12 2) indicates that the current received via the negative terminal (102b 2) of the second current generator (12 2) reaches or exceeds a given maximum threshold ( TH MAX), and - in case said verification indicates that the current received via the negative terminal (102b 2) of the second current generator (12 2) reaches or exceeds said given maximum threshold ( TH MAX), identifying said first current generator (12 1) with a state indicating a cross-wiring condition and deactivating said first current generator (12 1). - at least a first (12 1) and a second (12 2) current generator, and - for each of said first (12 1) and said second (12 2) current generator, a positive 102a 1, 102a 2) and a negative (102b 1, 102b 2) terminal adapted to be connected to one or more lighting modules, a) a switching stage comprising one or more electronic switches and one or more inductors, wherein an output of said switching stage is connected to the positive (102a 1, 102a 2) and negative (102b 1, 102b 2) terminal of the respective current generator (12 1, 12 2), b) a low-side current sensor configured to generate a feedback signal ( FB 1, FB 2) indicative of a current received via the negative (102b 1, 102b 2) terminal of the respective current generator (12 1, 12 2), and c) a regulator circuit configured to drive said one or more electronic switches of said switching stage as a function of the feedback signal ( FB 1, FB 2) of the respective current generator (12 1, 12 2); - activating said first current generator (12 1) and maintaining deactivated said second current generator (12 2), - while said first current generator (12 1) is activated and said second current generator (12 2) is deactivated, monitoring the feedback signal ( FB 2) of said second current generator (12 2), - verifying whether said feedback signal ( FB 2) of said second current generator (12 2) indicates that the current received via the negative terminal (102b 2) of the second current generator (12 2) reaches or exceeds a given maximum threshold ( TH MAX), and - in case said verification indicates that the current received via the negative terminal (102b 2) of the second current generator (12 2) reaches or exceeds said given maximum threshold ( TH MAX), identifying said first current generator (12 1) with a state indicating a cross-wiring condition and deactivating said first current generator (12 1).