Accessory power management
First Claim
1. A method of operating an accessory, the method comprising:
- establishing a connection between the accessory and a portable computing device;
providing, by the accessory, a request to the portable computing device inquiring whether the accessory should use a first power source or a second power source to power the accessory;
receiving, by the accessory, an instruction indicating which power source to use to power the accessory; and
using, by the accessory, the indicated power source to power the accessory.
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Accused Products
Abstract
Methods, apparatus, and circuits for managing power among portable computing devices and one or more accessories. One example provides commands to improve power management between a portable computing device and one or more accessories. Other examples provide commands that may allow a portable computing device to charge at a maximum available current level while providing an accessory with sufficient current for its proper operation. Another may help prevent a portable computing device from drawing a high level of current that could be detrimental to an accessory, while others provide commands that may allow a battery pack to instruct a portable computing device to not charge its internal battery. Another example may allow a portable computing device to determine which power supply among multiple power supplies should be used to power an accessory, while others may allow an accessory to retrieve charging current parameters from a portable computing device.
62 Citations
25 Claims
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1. A method of operating an accessory, the method comprising:
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establishing a connection between the accessory and a portable computing device; providing, by the accessory, a request to the portable computing device inquiring whether the accessory should use a first power source or a second power source to power the accessory; receiving, by the accessory, an instruction indicating which power source to use to power the accessory; and using, by the accessory, the indicated power source to power the accessory. - View Dependent Claims (2, 3, 4, 5)
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6. An accessory, comprising:
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an interface to electrically communicate with a computing device; and a power managing element coupled to the interface and operable to; communicate, to the computing device, a request inquiring which of a plurality of power sources is to be used; receive, from the computing device, a response to the request, the response including an indication indicating a preferred power source from the plurality of power sources; and draw current from the preferred power source. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A method of operating a computing device, the method comprising:
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establishing a connection between the computing device and an accessory; receiving, from the accessory, a request inquiring whether the accessory should use a first power source or a second power source; determining whether the accessory should use the first power source or the second power source; and communicating, to the accessory, an instruction indicating which power source to use. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A computing device, comprising:
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an interface to electrically communicate with an accessory; and a power managing element coupled to the interface and operable to; receive, from the accessory, a request inquiring which of a plurality of power sources is to be used; determine, from the plurality of power sources, a preferred power source; and communicate, to the accessory, a response including an indication of the preferred power source. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification