The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 01, 2025
Filed:
Oct. 12, 2023
Richtek Technology Corporation, Zhubei, TW;
Fu-Chi Lin, Hsinchu, TW;
RICHTEK TECHNOLOGY CORPORATION, Zhubei, TW;
Abstract
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.