Method and system for lowering static power consumption of vehicle-mounted electronic equipment as well as switching circuit

Abstract

The invention provides a method and a system for lowering the static power consumption of vehicle-mounted electronic equipment as well as a switching circuit. The method comprises the following steps:the switching circuit is triggered for conduction after receiving a vehicle ignition signal from wake-up signal or ignition / flameout signal acquiring equipment of at least one vehicle-mounted bus transceiver, and then a micro-controller connected with the switching circuit is connected to a power supply and powered on; after being powered on, the micro-controller outputs a first enable signal tothe switching circuit so as to keep the conduction of the switching circuit and to control electric equipment to work normally; and after acquiring a flameout instruction from a sleep signal or ignition / flameout signal acquiring equipment of the vehicle-mounted bus transceiver, the micro-controller controls the electric equipment to stop working, transmits a sleep signal to the vehicle-mounted bustransceiver, stops outputting the first enable signal to the switching circuit so as to disable the switching circuit, and is disconnected from the power supply, and then the vehicle-mounted bus transceiver enters the sleep state.

Description

technical field [0001] The invention relates to the technical field of vehicle-mounted electronic equipment, in particular to a method, system and switch circuit for reducing static power consumption of vehicle-mounted electronic equipment. Background technique [0002] With the rapid development of automobile technology, there are more and more types of on-board electronic equipment, and the functions on the car are becoming more and more abundant, such as listening to music, navigation, karaoke and other functions, which will undoubtedly increase the power consumption of the car. big. In addition, key functions such as ignition and starting of automobiles now require the operation of electronic equipment to be realized. However, usually the capacity of the on-board battery in the car is not large, and it is not allowed to keep the on-board electronic equipment in a high-power working state when the engine is not working, or when the car is turned off, the static power con...

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Problems solved by technology

However, usually the capacity of the on-board battery in the car is not large, and it is not allowed to keep the on-board electronic equipment in a high-power working state when the engine is not working, or when the car is turned off, the static power consumption of the on-board electronic equipment during sleep If it is too large, it will quickly deplete the electric energy of the car battery, causing the car to fail to start normally, so the car has higher and higher requirements for the static power consumption of the car electronic equipment. They are all required to be within 0.1mA, but now the on-board electronic equipment is very complex, resulting in a large power consumption when the on-board electronic equipment is sleeping, so a design method is needed to ensure that the static power consumption of the on-board electronic equipment is low when the on-board electronic equipment is in sleep

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