Power source devices for power delivery contract selections
AssigneeHewlett-Packard Development Company, L.P.
InventorsChristopher Woodbury, Robert C. Brooks
Life of this patent
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Abstract
An example power source device includes a universal serial bus interface to couple to a power sink device, a power supply interface to couple to a power supply, a power measurement controller to measure a total power consumption of the power sink device and the power source device, a power contract manager to select a power delivery contract for the power sink device based on the total power consumption, a power supply rating of the power supply and a previous power delivery contract, and a power delivery controller to deliver power to the power sink device according to the selected power delivery contract.
Claims18
A power sink device comprising:
- a universal serial bus interface to couple to a power source device;
- a power delivery controller interconnected with the universal serial bus interface, the power delivery controller to receive a power delivery contract defining power delivered to the power sink device;
- and
- a basic input/output system to:
- update a high threshold and a processor power limit based on the power delivery contract;
- and
- when a system power level exceeds the high threshold, limit a power consumption of a central processing unit to the processor power limit.
A power source device comprising:
- a first interface to receive, when the first interface is electrically coupled to a power supply, power from the power supply;
- a second interface to output, when the second interface is electrically coupled to a power sink device, power contracts to the power sink device;
- a power measurement controller to measure, when the second interface outputs a previous one of the power contracts, a total amount of the power consumed by a system comprised of the power sink device and the power source device;
- and
- a power contract manager to ascertain, when the power contract manager determines whether or not the total amount exceeds a power supply rating of the power source device, a power value for a subsequent one of the power contracts,
- wherein the power value for the subsequent one of the power contracts, when the power contract manager determines that the total amount exceeds the power supply rating, is lower than a power value for the previous one of the power contracts.
A non-transitory machine-readable storage medium storing machine-readable instructions, wherein a power source device receives power from a power supply and outputs power contracts to a power sink device,
- the instructions which when executed by a processor, cause the power source device to:
- obtain, when the power source device outputs a previous one of the power contracts, a total amount of the power consumed by a system comprised of the power sink device and the power source device;
- and
- ascertain, when the power source device determines whether or not the total amount exceeds a power supply rating of the power source device, a power value for a subsequent one of the power contracts,
- wherein the power value for the subsequent one of the power contracts, when the power source device determines that the total amount exceeds the power supply rating, is lower than a power value for the previous one of the power contracts.
Dependencies are inferred from the claim text.