×

Wireless power transmitter circuit and control circuit and control method thereof

  • US 10,447,082 B2
  • Filed: 05/19/2017
  • Issued: 10/15/2019
  • Est. Priority Date: 01/22/2017
  • Status: Active Grant
First Claim
Patent Images

1. A wireless power transmitter circuit, comprising:

  • a power inverter circuit which includes at least a first switching device, and is configured to operably convert a first DC power to an AC output power, wherein the AC output power includes an AC output current;

    a resonant transmitter circuit which includes at least a transmitter coil and a variable capacitor circuit, and is configured to operably convert the AC output power to a resonant wireless power, wherein the resonant wireless power includes a resonant current; and

    a control circuit, configured to operably generate an impedance control signal according to a difference between a current reference signal and a resonant current related signal, for controlling an impedance of the variable capacitor circuit to regulate the resonant current or the AC output current substantially at a predetermined current level, wherein the resonant current related signal is a signal related to the resonant current.

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