Wake up system for electronic component supported on a vehicle
First Claim
1. An assembly for controlling power consumption of at least one device supported on a vehicle having a communication bus over which signals are transmitted to or from the device, comprising:
- a controller that controls operation of the device;
a power supply portion that derives power from a vehicle power source and provides power to the controller;
a switch between the power supply portion and the vehicle power source, the switch having an open state opening the connection between the power supply portion and the vehicle power source when the device is in a sleep mode and a closed state closing the connection when the device is in an active mode;
a transceiver that responds to a wake up signal provided on the communication bus; and
a switch locking portion that responds to the transceiver to lock the switch into the closed state, the switch locking portion maintaining the switch in the closed state until the controller provides an indication that the device is to enter the sleep mode.
3 Assignments
0 Petitions
Accused Products
Abstract
A power control assembly limits the amount of leakage current absorbed by a device (30) supported on a vehicle when the device is in a sleep mode. The described example includes a switch (40) between a vehicle power source (54) and a power supply (50, 52) for the peripheral device. A locking portion (44) controls operation of the switch (40) so that selected portions of the device (30) are isolated from the vehicle power source (34) when the device (30) is in a sleep mode. A wake up signal received by a communication bus transceiver (32) activates the switch locking portion (44), which in turn allows the isolating switch (40) to be electrically closed and kept in the closed condition until the controller (54) of the device determines that the device should enter the sleep mode.
33 Citations
20 Claims
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1. An assembly for controlling power consumption of at least one device supported on a vehicle having a communication bus over which signals are transmitted to or from the device, comprising:
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a controller that controls operation of the device;
a power supply portion that derives power from a vehicle power source and provides power to the controller;
a switch between the power supply portion and the vehicle power source, the switch having an open state opening the connection between the power supply portion and the vehicle power source when the device is in a sleep mode and a closed state closing the connection when the device is in an active mode;
a transceiver that responds to a wake up signal provided on the communication bus; and
a switch locking portion that responds to the transceiver to lock the switch into the closed state, the switch locking portion maintaining the switch in the closed state until the controller provides an indication that the device is to enter the sleep mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of powering a device supported on a vehicle, the device including a power supply portion that powers a controller of the device, comprising the steps of:
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providing a switch between the power supply portion and a vehicle power source;
opening the switch to isolate the power supply portion from the vehicle power source when the device is in a sleep mode;
locking the switch to couple the power supply portion to the vehicle power source when the device is not in the sleep mode. - View Dependent Claims (12, 13, 14)
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15. A system for controlling power consumption by at least one device supported on a vehicle, comprising:
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a vehicle power source;
a device controller;
a device power supply that provides power to the controller;
a switch between the vehicle power source and the device power supply that opens to selectively isolate the power source from the power supply when the device is in a sleep mode and closes to selectively couple the power source to the power supply;
a switch locking portion that is operative to lock the switch closed responsive to a wake up signal indicating that the device should be activated out of the sleep mode, the switch locking portion only unlocking the switch responsive to a command from the device controller indicating that the device should enter the sleep mode. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification