Device for controlling voltage supply requirements of e.g. electrical equipment of electric or hybrid car, has control unit supplying electrical equipment with voltage from secondary source voltage on reception of signal

摘要

The device (D) has a control unit (MC1) generating an analog signal (s1) when a multiplexed communication network (RC) e.g. vehicle area network, is in a wakened state, an electrical equipment (EV) e.g. night lighting system, is used, and voltage (V1) is greater than threshold. The control unit generates another signal (s2) when the network is not in wakened sate, and equipment is used. Another control unit (MC2) supplies another voltage (V3). A third control unit (MC3) supplies the equipment with third voltage (V4) from rechargeable battery voltage (V2) on reception of the latter signal. The control units are arranged in a form of analog multiplexer, and in a combination of resistances and transistors.