Device for stabilizing supply voltage in electrical system of motor vehicle, has voltage source connected with functional component for supplying supply voltage to functional component and stabilizing supply voltage via resistor cascade

摘要

The device (1) has a voltage source (10) connected with a functional component (4) for supplying supply voltage to the functional component, where the functional component is in the form of a starter. The voltage source stabilizes the supply voltage via a resistor cascade (30). The resistor cascade includes two parallel-connected cascade branches. Each cascade branch comprises a series connection of a switch i.e. head light switch, with a resistor. A control unit controls the switch, and a charge pump supplies operating voltage to the control unit. The switch is formed by a transistor.