WIRELESS POWER TRANSFER IN-BAND COMMUNICATION SYSTEM

摘要

A transmitter module is used in a wireless charging system, and is used for performing in-band communication with a receiver module in the wireless charging system to provide a message to the receiver module. The transmitter module has a matching network, a rectifier and an impedance component. The matching network has at least one input terminal coupled to a coil of the transmitter module and at least one output terminal. The rectifier is coupled to the output terminal of the matching network. The impedance component is selectively coupled to the output terminal of the matching network to vary a reflected impedance of the transmitter module seen by the receiver module. By varying the reflected impedance of the transmitter module seen by the receiver module, the transmitter module communicates with the receiver module to provide power control commands, status and/or foreign object detection information.

主权项

1. A transmitter module, used in a wireless charging system, for performing in-band communication with a receiver module in the wireless charging system to provide a message to the receiver module, the transmitter module comprising:
a matching network, having at least one input terminal coupled to a coil of the transmitter module and at least one output terminal; a rectifier, coupled to the output terminal of the matching network; and an impedance component, selectively coupled to the output terminal of the matching network to vary a reflected impedance of the transmitter module seen by the receiver module; wherein by varying the reflected impedance of the transmitter module seen by the receiver module, the transmitter module communicate with the receiver module to provide power control commands, status and/or foreign object detection information.