×

Charging system and charging method, and power adapter

  • US 10,122,201 B2
  • Filed: 11/03/2017
  • Issued: 11/06/2018
  • Est. Priority Date: 02/05/2016
  • Status: Active Grant
First Claim
Patent Images

1. A power adapter, comprising:

  • a first rectifier, configured to rectify a first alternating current and output a first voltage with a first ripple waveform;

    a switch circuit, configured to modulate the first voltage according to a control signal and output a modulated first voltage;

    a transformer, configured to output a plurality of voltages with ripple waveforms according to the modulated first voltage;

    a compositing circuit, configured to composite the plurality of voltages to output a second alternating current, wherein, for each cycle of the second alternating current, a peak voltage of a positive half is greater than an absolute value of a valley voltage of a negative half;

    a first charging interface, coupled to an output end of the compositing circuit, and configured to apply the second alternating current to a battery in a terminal via a second charging interface of the terminal when the first charging interface is coupled to the second charging interface, in which the second charging interface is coupled to the battery;

    a sampling circuit, configured to sample voltage and/or current at a primary winding of the transformer to obtain a voltage sampling value and/or a current sampling value;

    a control circuit, coupled to the sampling circuit and the switch circuit respectively, and configured to output the control signal to the switch circuit, and to adjust a duty ratio of the control signal according to the current sampling value and/or the voltage sampling value, such that the second alternating current meets a charging requirement of the terminal.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×