Patent ID: 6798086
Filing Date: 2004-09-28
Classification: H02M,Y02B

Abstract:
An electronic apparatus comprising:an electricity supply device for supplying a first power; a first voltage converting circuit for converting the first power into a second power having a different voltage from the first power and outputting the second power; a second voltage converting circuit for converting the first power into a third power having a different voltage from the first power and outputting the third power; and a load circuit operated by a fourth power obtained based on the second power and the third power; wherein the first voltage converting circuit has a higher power supplying ability than the second voltage converting circuit, the second voltage converting circuit has a higher conversion efficiency than the first voltage converting circuit at a supply time of a low power, the load circuit has a first operating mode and a second operating mode having a smaller consumed electric current than that in the first operating mode, and the electronic apparatus generates the fourth power based on at least the second power in the first operating mode of the load circuit, and generates the fourth power based on only the third power by stopping an operation of the first voltage converting circuit in the second operating mode of the load circuit.