Patent ID: 7064521

Claim:
A charging circuit for controlling a system charging parameter provided to a host of batteries by a DC to DC converter, wherein said host of batteries comprises at least a first battery and second battery that may be coupled in parallel, said charging circuit compnsing: a first pat configured to monitor a first battery charging current provided to said first battery; a second path configured to monitor a second battery charging current provided to said second battery; a third path configured to monitor a first battery charging voltage provided to said first battery; a fourth path configured to monitor a second battery charging voltage provided to said second battery; and a regulating circuit configured to reduce said system charging parameter provided to said host of batteries by providing a control signal to said DC to DC converter if said first battery charging current exceeds a first maximum charging current level or said second battery charging current exceeds a second maximum charging current level or said first battery charging voltage exceeds a first maximum charging voltage level, or said second battery charging voltage exceeds a second maximum charging voltage level, said first and second maximum charging current levels and said first and second maximum charging voltage levels provided to at least one input terminal of said charging circuit by a host power management unit.