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Quick charging method, power adapter and mobile terminal, bidirectional communication using USB interface

  • US 10,404,083 B2
  • Filed: 05/13/2015
  • Issued: 09/03/2019
  • Est. Priority Date: 05/13/2015
  • Status: Active Grant
First Claim
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1. A quick charging method, the method comprising:

  • coupling a power adapter to a mobile terminal via a Universal Serial Bus (USB) interface, a power line of the USB interface being used for the power adapter to charge the mobile terminal, the power adapter supporting a normal charging mode and a quick charging mode, a charging current corresponding to the quick charging mode being greater than a charging current corresponding to the normal charging mode;

    transmitting, by the power adapter, a clock signal to the mobile terminal via a first data line of the USB interface when the power adapter becomes coupled to the mobile terminal, wherein the clock signal indicates a communication sequence between the power adapter and the mobile terminal;

    conducting, by the power adapter, a bidirectional communication with the mobile terminal via a second data line of the USB interface under control of the communication sequence, so as to query the mobile terminal for an indication of whether to activate the quick charging mode and to determine to charge the mobile terminal in the quick charging mode when the indication indicates to activate the quick charging mode; and

    adjusting, by the power adapter, a charging current of the power adapter to the charging current corresponding to the quick charging mode to charge the mobile terminal.

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