Overvoltage protection circuit for wireless power receiver
US11056878B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2019 |
| Grant date | Jul 6, 2021 |
| Priority date | — |
| Expiry date | Jan 15, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/322
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A wireless power receiver has over-voltage protection (OVP) circuitry that performs different techniques for different over-voltage conditions. The OVP circuitry includes controllable resistive clamp circuitry (a resistor in series with a resistor control switch) and controllable capacitive clamp circuitry (a capacitor in series with a capacitor control switch). Based on an output-based feedback signal and a reference signal, comparison circuitry generates comparison signals, based on which a controller selectively enables (i) the resistive clamp circuitry intermittently for a relatively low over-voltage condition and continuously for a higher over-voltage condition and (ii) the capacitive clamp circuit to detune the receiver, both in order to decrease the rectified output voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.