Patent ID: 7782018

Claim:
A method of maintaining a minimum system voltage in a battery operated system having a component preferably operated at a first current, but operable with currents less than the first current, comprising: 1) sensing system voltage; and, 2) when the system voltage falls below the predefined threshold, incrementally decreasing the current provided to the component; and 3) when the system voltage goes above the predefined threshold plus a hysteresis voltage, incrementally increasing the current provided to the component; and, 4) if the system voltage falls below the predefined threshold after a first predefined time period after the incremental decrease in current, again incrementally decreasing the current provided to the component; and, 5) if the system voltage goes above the predefined threshold plus the hysteresis voltage increment after a second predefined time period after the incremental increase in current, again incrementally increasing the current provided to the component; 6) repeating 4) and 5) multiple times.