Current supply circuit for emergency supply for electrical components in mobile systems, e.g. vehicles, connects output to battery in low impedance manner if voltage level at output falls below defined level

摘要

The circuit has an output for connection to a battery in low impedance manner if required and a stage for providing a comparatively low defined residual output current with a defined maximum amplitude if the output is not connected to the battery in a low impedance manner and the rest of the circuit is to be held at zero current. The output is connected to a battery in a low impedance manner if the output voltage falls below a defined level. The circuit has an output (4) that can be connected to a battery in low impedance manner if required and a circuit arrangement (7,8,11-16,19) for providing a comparatively low defined residual current at the output with a defined maximum amplitude if the output is not connected to the battery in a low impedance manner and in this situation the rest of the circuit is to be held at zero current. The circuit is designed to connect the output to a battery in a low impedance manner if the voltage level at the output falls below a defined level. An Independent claim is also included for a separate electrical component with an inventive emergency supply.