System and method for managing power consumption of an information handling system
First Claim
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1. An information handling system comprising:
- plural components that consume power to process information, the plural components including at least a central processor unit;
a power subsystem operable to provide direct current voltage to the plural components;
a power adapter operable to convert alternating current to direct current and to provide the direct current to the power subsystem;
an adapter manager integrated with the adapter and operable to adjust the adapter direct current voltage output between a first voltage level and a second voltage level; and
a power manager associated with the power subsystem and interfaced with the adapter manager, the power manager operable to command the first direct current voltage if the central processor unit has a first power consumption state in which the central processor unit consumes a first amount of power and the second direct current voltage if the central processor unit has a second power consumption state in which the central processor unit consumes no power, wherein at least some of the plural components consume power in both the first and second power consumption states.
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Abstract
An AC-to-DC power adapter provides DC power to an information handling system at a first higher DC voltage or a second lower DC voltage based upon a power state of the information handling system. For example, approximately 19 Volts DC power is provided if the information handling system is in an on state or if the information handling system is charging a battery. Approximately 13 Volts DC power is provided if the information handling system is in a reduced power state, such as an ACPI S3 state, with a battery having a substantially full charge.
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Citations
17 Claims
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1. An information handling system comprising:
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plural components that consume power to process information, the plural components including at least a central processor unit; a power subsystem operable to provide direct current voltage to the plural components; a power adapter operable to convert alternating current to direct current and to provide the direct current to the power subsystem; an adapter manager integrated with the adapter and operable to adjust the adapter direct current voltage output between a first voltage level and a second voltage level; and a power manager associated with the power subsystem and interfaced with the adapter manager, the power manager operable to command the first direct current voltage if the central processor unit has a first power consumption state in which the central processor unit consumes a first amount of power and the second direct current voltage if the central processor unit has a second power consumption state in which the central processor unit consumes no power, wherein at least some of the plural components consume power in both the first and second power consumption states. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for managing power applied to an information handling system, the method comprising:
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determining at the information handling system a first power state or a second power state, the first power state having a central processor unit powered on, the second power state having the central processor unit powered off and a random access memory powered on and storing an operating system for access by the central processor upon power up of the central processor; commanding an AC-to-DC adapter to provide a first direct current voltage if the first power state is determined or a second direct current voltage if the second power state is determined, the first direct current voltage greater than the second direct current voltage; and outputting either the first or second direct current voltage from the AC-to-DC adapter in response to the commanding. - View Dependent Claims (11, 12, 13, 14)
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15. An AC-to-DC power adapter comprising:
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a converter circuit operable to convert an AC voltage to either a first or a second DC voltage and to provide the first or the second DC voltage to a device, the first DC voltage greater than the second DC voltage; and an adapter manager operable to receive power state information from the device and to apply the power state information to select output of either the first or second DC voltage, the power state information including at least whether a central processor unit of the device is powered on or powered off; wherein the adapter manager applies the first DC voltage if the processor is powered on and the second DC voltage if the processor is powered off, the selection of the first or second DC voltage made independent of a battery charge state of the device. - View Dependent Claims (16, 17)
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Specification