The invention provides a power management circuit, method and system. A power-switching circuit of the power management circuit comprises a first output end and a second output end, the first output end is used for supplying power to a microcontroller, a CAN transceiver and a peripheral circuit, and the second output end provides awaking voltage for the CAN transceiver; when the power-switching circuit, the microcontroller and the CAN transceiver are in a sleep mode, that is, a vehicle control unit is not required to be supplied with power, the first output end outputs a low level, so that the static power consumption is reduced, meanwhile, the second output end outputs constant power to ensure the CAN transceiver to awake the microcontroller as required, and the vehicle control unit recovers the normal working state. When the peripheral circuit is not in the sleep mode, the first output end can output a high level to supply power to the peripheral circuit according to the actual condition. In conclusion, the power management circuit can perform power management on the vehicle control unit according to the actual condition, and the static power consumption is controlled at the lowest level.
Power management circuit, method and system
2015-08-26
Patent
Elektronische Ressource
Englisch
IPC: | B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR |
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Europäisches Patentamt | 2022
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