Vehicle and vehicle-mounted multimedia power management system

Abstract

The invention discloses a vehicle and a vehicle-mounted multimedia power management system. The system includes a power switch, an ACC detection circuit, a microcontroller and a microcontroller powersupply. The first end of the power switch is connected to an ACC power supply of the vehicle, the second end of the power switch is connected with a vehicle-mounted power supply, the output end of thepower switch is connected with a power amplifier and a power module in the vehicle-mounted multimedia, and the power switch cuts off the power supply path of the vehicle-mounted power supply to the power amplifier and the power module when the ACC power supply is cut off. The ACC detection circuit outputs a low power consumption signal when the ACC power supply is detected to be cut off. The microcontroller enters a low power consumption operation mode when receiving the low power consumption signal and controls at least part of a peripheral circuit of the microcontroller to be powered off. The microcontroller power supply converts the voltage supplied by the vehicle-mounted power supply to supply power to the microcontroller. The dark current of the vehicle-mounted multimedia can be effectively reduced, more requirements of the vehicle specifications are met, and the hardware cost is not increased too much.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a vehicle multimedia power management system and a vehicle with the vehicle multimedia power management system. Background technique [0002] For the electrical equipment used in automobiles, OEMs have been pursuing lower standby power consumption, which is related to the car battery feed time, cruising range (such as new energy vehicles) and so on. Only when each electrical equipment is required to have a lower dark current, can the whole vehicle achieve low standby power consumption and long standby time. [0003] At present, most OEMs require that the dark current of car audio-visual equipment is 10mA or less. The usual way to achieve this is to replace it with a standby low-power device, and use software control to make the power supply and power amplifier device in a low-power mode. However, this The implementation method cannot fully meet the extremely low dark current ...

AI Technical Summary

Problems solved by technology

[0003]Currently, most OEMs require the dark current of car audio-visual equipment to be 10mA or below. The usual implementation method is to replace it with a standby low-power device and control it through software. , so that the power supply and power amplifier devices are in low power consumption mode, but this implementation method cannot fully meet the extremely low dark current requirements, and will increase more hardware costs

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