Patent ID: 8125189

Claim:
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.