System and method for managing power provided to a portable information handling system
First Claim
1. An information handling system comprising:
- a chassis;
plural processing components disposed in the chassis and operable to process information;
a battery disposed in the chassis and operable to power the processing components;
a power adapter external to the chassis and operable to interface with and power the processing components and to interface with and charge the battery, the power adapter having a predetermined power rating; and
a power manger interfaced with the processing components, the battery and the power adapter, the power manger operable to detect that power drawn by the processing components approaches the power adapter power rating, the power manager further operable to manage operation of the processing components to maintain power drawn by the processing components at less than the power adapter rating;
wherein the processing components have a battery optimized mode of operating, the battery optimized mode reducing power consumption of the processing components while operating on power provided by the battery, the power manager further operable to manage operation of the processing components to maintain power drawn by the processing components at less than the power adapter rating by selectively commanding the battery optimized mode.
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Accused Products
Abstract
A portable information handling system having internal battery power and external adapter power manages power drawn from the external power adapter to avoid exceeding the power rating of the external power adapter. As power drawn from the external adapter approaches a predetermined limit of the power adapter power rating, a power manager of the information handling system alters the operation of the information handling system to reduce power drawn from the adapter, such as by reducing current drawn to charge the battery, enforcing battery optimized mode steps or throttling central processing unit operation. Incremental decreases in power consumption maintain power draw below the external adapter power rating while incremental increases in power consumption have a delay that returns the information handling system to normal operations without excessive oscillation between operating modes.
34 Citations
19 Claims
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1. An information handling system comprising:
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a chassis; plural processing components disposed in the chassis and operable to process information; a battery disposed in the chassis and operable to power the processing components; a power adapter external to the chassis and operable to interface with and power the processing components and to interface with and charge the battery, the power adapter having a predetermined power rating; and a power manger interfaced with the processing components, the battery and the power adapter, the power manger operable to detect that power drawn by the processing components approaches the power adapter power rating, the power manager further operable to manage operation of the processing components to maintain power drawn by the processing components at less than the power adapter rating; wherein the processing components have a battery optimized mode of operating, the battery optimized mode reducing power consumption of the processing components while operating on power provided by the battery, the power manager further operable to manage operation of the processing components to maintain power drawn by the processing components at less than the power adapter rating by selectively commanding the battery optimized mode. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for managing power drawn by an information handling system from an external power adapter having a power rating, the method comprising:
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detecting that power drawn by the information handling system falls within a predetermined limit of the power rating; incrementally reducing power drawn by the information handling system to charge a battery; and incrementally reducing power drawn by one or more processing components to maintain power drawn by the information handling system at less than the power adapter power rating. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A system for managing power drawn by an information handling system from an external power adapter, the system comprising:
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an input current sensor operable detect current drawn from the adapter; a comparator interfaced with the input current sensor, the comparator operable to compare the current drawn from the adapter with a maximum current and to issue a trip signal if the current drawn from the adapter falls within a predetermined limit of the maximum current; and a power incrementer interfaced with the comparator, the power incrementer operable to incrementally alter the operation of one or more processing components of the information handling system in response to the trip signal, the altering of the operation of the one or more processing components to reduce power consumed by the one or more processing components so that the current drawn from the adapter remains below the maximum current. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification