Wireless power transmitter circuit having OVP control for receiver circuit and control circuit and method thereof
US12348054B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 12, 2023 |
| Grant date | Jul 1, 2025 |
| Priority date | — |
| Expiry date | Oct 16, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B5/79
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.