Unit with controlled consumption for the command of power switches in a rectifier bridge supplying an alternator or a starter-alternator

The voltage rectifier has a car network feed to an alternator (AD) with a rectifier bridge having power transistors and control units. Each control unit has a transistor (11) with a driver (DV) to an auxiliary feed (Vb). The auxiliary feed only passes current to the driver whilst the car network feed is insufficient.