System and method for powering and charging a mobile communication device
First Claim
Patent Images
1. A mobile communication device, comprising:
- a rechargeable battery for powering the mobile communication device;
a Universal Serial Bus (USB) interface for connecting the mobile communication device to a USB host device;
a charging subsystem coupled to the rechargeable battery and the USB interface, the charging subsystem being operable to charge the rechargeable battery with power received by the USB interface from the USB host device;
means for requesting a power allotment from the USB host device, the power allotment controlling a maximum amount of power that the charging subsystem can draw from the USB host device; and
means for determining if the power allotment received from the USB host device is less than a requested value, and if the power allotment is less than the requested value then resetting a USB connection between the mobile communication device and the USB host device in order to receive a new power allotment from the USB host device.
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Abstract
A system for powering and charging a mobile communication device includes a processing device, a rechargeable battery, a Universal Serial Bus (USB) interface, and a charging subsystem. The rechargeable battery is configured to supply power to the processing device. The USB interface is configured to connect to a USB port via a USB cable. The charging subsystem is coupled to the USB interface, and is configured to charge the rechargeable battery using power received from the USB interface.
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Citations
44 Claims
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1. A mobile communication device, comprising:
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a rechargeable battery for powering the mobile communication device;
a Universal Serial Bus (USB) interface for connecting the mobile communication device to a USB host device;
a charging subsystem coupled to the rechargeable battery and the USB interface, the charging subsystem being operable to charge the rechargeable battery with power received by the USB interface from the USB host device;
means for requesting a power allotment from the USB host device, the power allotment controlling a maximum amount of power that the charging subsystem can draw from the USB host device; and
means for determining if the power allotment received from the USB host device is less than a requested value, and if the power allotment is less than the requested value then resetting a USB connection between the mobile communication device and the USB host device in order to receive a new power allotment from the USB host device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of charging a rechargeable battery in a device having a charging subsystem, a USB interface and a processing device, the USB interface having Vbus and GND lines connected to the charging subsystem and D+ and D−
- lines electrically connected to the processing device, the charging subsystem connected to the rechargeable battery, the method comprising the steps of;
receiving a charge configuration from the USB interface;
signaling the charge configuration to the charging subsystem;
requesting a power allotment from the USB host device, the power allotment controlling a maximum amount of power that the charging subsystem can draw from the USB host device;
determining if the power allotment received from the USB host device is less than a requested value, and if the power allotment is less than the requested value then resetting a USB connection between the mobile communication device and the USB host device in order to receive a new power allotment from the USB host device;
deriving power from the Vbus and GND lines at the charging subsystem; and
charging the rechargeable battery using the derived power using the charging subsystem. - View Dependent Claims (19, 20, 21, 22)
- lines electrically connected to the processing device, the charging subsystem connected to the rechargeable battery, the method comprising the steps of;
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23. A method of charging a mobile communication device having a rechargeable battery and a charging subsystem, the mobile communication device connected via a unified data and power bus to a host system, the method comprising the steps of:
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obtaining a charge configuration from the unified bus;
applying the charge configuration to the charging subsystem;
requesting a power allotment from the USB host device, the power allotment controlling a maximum amount of power that the charging subsystem can draw from the USB host device;
determining if the power allotment received from the USB host device is less than a requested value, and if the power allotment is less than the requested value then resetting a USB connection between the mobile communication device and the USB host device in order to receive a new power allotment from the USB host device;
and charging the rechargeable battery using power derived from the unified bus. - View Dependent Claims (24, 25, 26, 27)
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28. A mobile communication device, comprising:
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a rechargeable battery for powering the mobile communication device;
a Universal Serial Bus (USB) interface for connecting the mobile communication device to a USB host device;
a charging subsystem coupled to the rechargeable battery and the USB interface, the charging subsystem being operable to charge the rechargeable battery with power received by the USB interface from the USB host device;
a processing device for requesting a power allotment from the USB host device, the power allotment controlling a maximum amount of power that the charging subsystem can draw from the USB host device;
the processing device being operable to determine if the power allotment received from the USB host device is less than a requested value, and if the power allotment is less than the requested value then the processing device resets a USB connection between the mobile communication device and the USB host device in order to receive a new power allotment from the USB host device. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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Specification