SYSTEMS FOR CHARGING A BATTERY IN A CLOSED LOOP CONFIGURATION
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Abstract
A system is provided for charging a battery with an AC adapter. The system includes a first closed loop electrical path between the battery and the AC adapter. The first closed loop electrical path includes a first monitoring circuit for monitoring at least one first parameter of the system and a control circuit for dynamically adjusting the AC adapter output to the battery in response to the at least one first parameter exceeding an associated predetermined threshold. The system includes a second closed loop electrical path between the battery and the AC adapter. The second closed loop electrical path includes a second monitoring circuit for monitoring at least one second parameter of the system and a protection circuit responsive to the at least one second parameter exceeding an associated predetermined threshold for protecting the system until the AC adapter reaches a predetermined value.
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Citations
40 Claims
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1-20. -20. (canceled)
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21. A system that controls an AC adapter output of an AC adapter for charging a battery and providing power to a system power bus, the system comprising:
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a first closed control loop that includes a first monitoring circuit that monitors at least one first parameter associated with charging of the battery and/or powering the system power bus and a control circuit that transmits a control signal to the AC adapter to cause adjustment to the AC adapter output in response to the at least one parameter exceeding an associated first predetermined threshold; and a second closed control loop that includes a second monitoring circuit that monitors transients associated with at least one second parameter associated with charging of the battery and/or powering the system power bus and increases a resistance of a protection circuit between the AC adapter output and the battery and/or system power bus in response to the at least one parameter exceeding an associated second predetermined threshold to protect the battery and/or system power bus, until the first closed control loop adjusts the AC adapter output to a predetermined value. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A portable electronic device having a battery, the portable electronic device adapted to have the battery charged by an AC adapter output of and AC adapter, the portable electronic device comprising:
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a system power bus coupled to the AC adapter output and the battery through a resistive element; a first closed control loop that includes a first monitoring circuit that monitors at least one first parameter associated with charging of the battery and/or powering the system power bus and provides an error signal to a control circuit that transmits a control signal to the AC adapter to cause adjustment to the AC adapter output in response to the at least one parameter exceeding an associated first predetermined threshold; and a second closed control loop that includes a second monitoring circuit that monitors transients associated with at least one second parameter associated with charging of the battery and/or powering the system power bus and generates an error signal that increases a resistance of the resistive device between the AC adapter output and the battery and/or system power bus in response to the at least one second parameter exceeding an associated second predetermined threshold to protect the battery and/or system power bus, until the first closed control loop adjusts the AC adapter output to a predetermined value. - View Dependent Claims (32, 33, 34, 35, 36)
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37. A system for charging a battery with an AC adapter, the system including a system power bus operatively connected to the AC adapter, the system comprising:
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a first monitoring means for monitoring a parameter associated with charging of the battery and/or powering of the system power bus; a control means for dynamically adjusting AC adapter output when the parameter monitored by the first monitoring means exceeds an associated first predetermined threshold; a second monitoring means for monitoring transients of the parameter associated with charging of the battery and/or powering of the system power bus; and protection means responsive to the second monitoring means when the parameter monitored by the second monitoring means exceeds a second predetermined threshold, wherein the protection means activates to protect the battery and/or system power bus, until the first monitoring means and the control means adjust the AC adapter output to the second predetermined threshold. - View Dependent Claims (38, 39, 40)
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Specification