Patent ID: 7615965
Filing Date: 2009-11-10
Classification: H02J

Abstract:
1. An apparatus comprising: a power source selector coupled to a plurality of different types of power supplies and to a rechargeable battery, said power source selector operable for selecting and electrically coupling a power supply of said plurality to a load and to said battery to both deliver power to said load and charge said battery, said selecting in response to a plurality of presence signals indicating presence of said plurality of different power supplies and in response to a current information signal indicating an input current flowing from said power supply; and a charger controller coupled to said power source selector and operable for generating said current information signal and for selecting a charging mode from at least a switch mode and a linear mode to charge said battery, wherein said charger controller is also operable for controlling a duty cycle of a pulse signal and a level of a linear control signal according to said plurality of presence signals and said current information signal, thereby controlling a charging power to said battery in said switch mode and said linear mode.