Power supplies for electrical devices operating in vehicles

摘要

A power supply provides power to an electrical device such as a motherboard operating in a vehicle. The motherboard may include a soft power switch input and a power source input and follow a power-up mode and a power-down mode. The power supply may include a power input for connecting to a battery of the vehicle and a switch input for connecting to an ignition of the vehicle. The power supply may also include a power output for connecting to the power source input of the motherboard and a switch output for connecting to the soft power switch input of the motherboard. A converter is connected between the power input and the power output for converting DC input power from the battery to DC output power for the motherboard. A controller is connected to the switch input and the switch output. The controller is programmed to cause the motherboard to initiate the power-up mode when the ignition of the vehicle is turned on and to initiate the power-down mode when the ignition of the vehicle is turned off.