Wireless power overvoltage protection circuit with reduced power dissipation

摘要

Systems, methods, and apparatus for overvoltage protection in a wireless power receiver are disclosed. One aspect of the disclosure is a wireless power receiver apparatus. The apparatus includes an antenna circuit configured to wirelessly receive power, from a transmitter, at a level sufficient to power or charge a load, wherein the antenna circuit is electrically connected to an overvoltage protection circuit that is electrically connected between the antenna circuit and the load. The apparatus also includes a matching circuit electrically connected to the antenna circuit and a switching element electrically connected to the matching circuit. At least one of the matching circuit or the switching element is configured to control an amount of the received power flowing into the overvoltage protection circuit.

主权项

1. A wireless power receiver apparatus, comprising:
an antenna circuit configured to wirelessly receive power, from a transmitter, at a level sufficient to power or charge a load, wherein the antenna circuit is electrically connected to an overvoltage protection circuit that is electrically connected between the antenna circuit and the load comprising a rectifier; a matching circuit electrically connected to the antenna circuit; and a switching element electrically connected to the matching circuit, wherein at least one of the matching circuit or the switching element is configured to reduce an amount of the received power flowing into the overvoltage protection circuit in response to an overvoltage condition, wherein the matching circuit comprises at least two components, wherein the switching element is electrically connected between the at least two components, and wherein the matching circuit is configured to reduce the amount of the received power and provide the reduced amount of the received power to the switching element.