Patent ID: 7202634

Claim:
A circuit for controlling a charging parameter provided to a rechargeable battery, said circuit comprising: a power control circuit configured to provide a power control signal representative of a power output level of a DC source, said power control circuit comprising a first path configured to provide a first signal representative of a current level output of said DC source, a second path configured to provide a second signal representative of a voltage level output of said DC source, and a power conversion circuit configured to accept said first and second signal and provide said power control signal in response to said first and second signal, said power conversion circuit comprising a multiplier coupled to said first path and second path, said multiplier configured to accept said first signal and said second signal and provide a third signal, said third signal based on a product of said first and second signal, wherein said power control signal is based on said third signal; and a control signal generating circuit configured to reduce said charging parameter provided to said battery if said power output level exceeds a predetermined power threshold level.