Power management system
First Claim
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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.
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Abstract
A method according to one embodiment may include selecting at least one power supply, among a plurality of different power supplies, and coupling at least one available power supply to a load. The method may also include selecting at least one charging mode, among a plurality of different charging modes, to charge a rechargeable battery. Of course, many alternatives, variations, and modifications are possible without departing from this embodiment.
73 Citations
24 Claims
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1. An apparatus comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 24)
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8. A method comprising:
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receiving a plurality of presence signals indicating the presence of a plurality of different power supplies; generating a current information signal indicating an input current flowing from at least one available power supply; selecting a power supply from said plurality of different power supplies and electrically coupling said power supply to a load and to a rechargeable battery in response to said plurality of presence signals and said current information signal to both deliver power to said load and charge said battery; selecting a charging mode from at least a switch mode and a linear mode to charge said battery; 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; and controlling a charging power to said battery in said switch mode and said linear mode according to said pulse signal and said linear control signal respectively. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A system comprising:
a portable electronic device comprising an integrated circuit and a load and coupled to a plurality of different types of power supplies and to a rechargeable battery, said integrated circuit operable for receiving a plurality of presence signals indicating the presence of said plurality of different power supplies and for generating a current information signal indicating an input current flowing from at least one available power supply, said integrated circuit further operable for selecting a power supply from said plurality of different power supplies and electrically coupling said power supply to both said load and said battery in response to said plurality of presence signals and said current information signal, said integrated circuit further operable for selecting a charging mode from at least a switch mode and a linear mode to charge said battery, said integrated circuit further 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 respectively controlling a charging power to said battery in said switch mode and said linear mode. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
Specification