WIRELESS POWER TRANSMITTER CIRCUIT HAVING OVP CONTROL FOR RECEIVER CIRCUIT AND CONTROL CIRCUIT AND METHOD THEREOF

A wireless power transmitter circuit includes: a power stage circuit including plural switches coupled to a resonant transmitter circuit, wherein the resonant transmitter circuit includes a transmission coil and a resonant capacitor which are coupled to each other; and a transmission control circuit controlling the power stage circuit to convert an input power to a driving power according to a pulse width modulation (PWM) control signal when a corresponding wireless power receiver circuit is near by the resonant transmitter circuit. The driving power drives the resonant transmitter circuit to generate a wireless transmitting power, which is supplied to the corresponding wireless power receiver circuit. When a variation rate of a driving current of the driving power with respect to time exceeds a variation rate threshold, an operation parameter of the power stage circuit is adjusted to reduce a power level of the wireless transmitting power.