Patent ID: 7763994

Claim:
A power source system operable to supply a load circuit with electrical power, said power source system comprising: a power-supplying source comprising a plurality of power source terminals that differ in output voltage from each other, said power-supplying source being operable to supply the electrical power through said plurality of power source terminals; a power source terminal-selecting unit operable to select one of said plurality of power source terminals; a plurality of voltage converting units connected to said power source terminal-selecting unit, said plurality of voltage converting units being operable to convert electrical voltage; a voltage converting unit-selecting unit operable to select one of said plurality of voltage converting units; and a control unit operable to control a selection to be made by each of said power source terminal-selecting unit and said voltage converting unit-selecting unit, wherein said control unit comprises a consumption value-measuring unit operable to measure a consumption value in the load circuit, and to provide a measurement result, and wherein based on the measurement result, said control unit exercises control over a selection to be made by each of said power source terminal-selecting unit and said voltage converting unit-selecting unit.