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System method for rapidly charging USB device's battery wherein USB device requests charging the battery at a higher power level

  • US 7,631,111 B2
  • Filed: 08/17/2006
  • Issued: 12/08/2009
  • Est. Priority Date: 08/17/2006
  • Status: Active Grant
First Claim
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1. A method for charging a device, comprising:

  • a hub detecting coupling of the device, wherein the device comprises a battery;

    the hub determining if the device should receive high-power charging of the battery, wherein determining if the device should receive high-power charging is based on a request received from the device when the device should receive the high-power charging;

    the hub receiving power from a power source other than a host device;

    the hub providing power to the device at a first power level to charge the battery if the device should receive the high-power charging of the battery, wherein the first power level is greater than a maximum enumeration power level, wherein, prior to and during charging, the device is not enumerated, and wherein at least a portion of the power at the first power level is provided from the power source; and

    if the device should not receive high-power charging of the battery, the hub enumerating the device with respect to the host device and providing power to the device at a second power level lower than the first power level.

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