Energy efficient method to wake host system for charging battery powered portable devices via bus powered external i/o ports
First Claim
1. A peripheral device battery charging circuit, comprising:
- a signal converter that is coupled between an input port and a controller that is coupled to an IHS battery, wherein the signal converter is operable to sense the coupling of a peripheral device battery to the input port and, in response, send a signal to the controller, and wherein in response to the signal, the controller is operable to change an advanced configuration and power interface (ACPI) state of an information handling system (IHS) and allow power from the IHS battery in the IHS to be supplied to the input port to charge the peripheral device battery, and wherein the signal converter is also operable to restrict the controller from changing the ACPI state of the IHS multiple times for a given coupling of the peripheral device battery to the input port; and
a ground loop detector that is coupled in parallel with the signal converter between the input port and the controller and that is operable to allow the controller to determine that the peripheral device battery has maintained being coupled to the input port upon the IHS changing ACPI states and entering a run time ACPI state.
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Accused Products
Abstract
Optimized bus powered peripheral battery charging includes a circuit to initiate a change in an advanced configuration and power interface (ACPI) state in a controller allowing charging of a peripheral device battery, the circuit including a signal converter coupled between an input port and the controller to sense when a the peripheral device battery is coupled to an input port and to restrict the controller from changing ACPI state multiple times for a given peripheral device battery coupling; and a ground loop detector coupled in parallel to the signal converter between the input port and the controller to allow the controller to know that the peripheral device battery has maintained being coupled to the input port.
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Citations
20 Claims
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1. A peripheral device battery charging circuit, comprising:
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a signal converter that is coupled between an input port and a controller that is coupled to an IHS battery, wherein the signal converter is operable to sense the coupling of a peripheral device battery to the input port and, in response, send a signal to the controller, and wherein in response to the signal, the controller is operable to change an advanced configuration and power interface (ACPI) state of an information handling system (IHS) and allow power from the IHS battery in the IHS to be supplied to the input port to charge the peripheral device battery, and wherein the signal converter is also operable to restrict the controller from changing the ACPI state of the IHS multiple times for a given coupling of the peripheral device battery to the input port; and a ground loop detector that is coupled in parallel with the signal converter between the input port and the controller and that is operable to allow the controller to determine that the peripheral device battery has maintained being coupled to the input port upon the IHS changing ACPI states and entering a run time ACPI state. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An information handling system (IHS), comprising:
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a processor; an IHS battery coupled to the processor; a controller coupled to the processor; an input port coupled to the processor; a signal converter that is coupled between the input port and the controller and that is operable to sense when a peripheral device battery is coupled to the input port and, in response, send a signal to the controller, wherein in response to the signal, the controller is operable to change an advanced configuration and power interface (ACPI) state of the IHS and allow power from the IHS battery to be supplied to the input port to charge the peripheral device battery, and wherein the signal converter is also operable to restrict the controller from changing the ACPI state of the IHS multiple times for a given coupling of the peripheral device battery to the input port; and a ground loop detector that is coupled in parallel with the signal converter between the input port and the controller and that is operable to allow the controller to determine that the peripheral device battery has maintained being coupled to the input port upon the IHS changing ACPI states and entering a run time ACPI state. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A peripheral device battery charging method, comprising:
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providing an information handling system (IHS) including an IHS battery and an input port coupled to the IHS battery; detecting the coupling of a peripheral device battery to an input port and, in response, changing an advanced configuration and power interface (ACPI) state of an information handling system (IHS) and allowing power from the IHS battery to be supplied to the input port to charge the peripheral device battery; restricting the changing of the ACPI state of the IHS multiple times for a given coupling of the peripheral device battery to the input port; and determining that the peripheral device battery has maintained being coupled to the input port upon an IHS changing ACPI states to a run time ACPI state. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification