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Systems for charging a battery in a closed loop configuration

  • US 8,125,189 B2
  • Filed: 04/11/2008
  • Issued: 02/28/2012
  • Est. Priority Date: 04/18/2005
  • Status: Active Grant
First Claim
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1. 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:

  • 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 controls a resistance of a protection circuit between the AC adapter output and the battery and/or system power bus to regulate the second parameter in response to the at least 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.

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