Semtech Corporation

Wen Cai

Feng Hou

Ross Eliot Teggatz

David John Baldwin

Petru Emanuel Stingu

Eric Christian Blackall

Francois Ricodeau

A system is disclosed that includes a wireless power receiver, a battery charging system coupled to the wireless power receiver and configured to charge a battery using power received from the wireless power receiver and a wireless data communication system coupled to the wireless power receiver and the battery charging system, the wireless data communication system configured to determine a power requirement and to transmit the power requirement using the wireless power receiver.

System for wireless power transmission and communication

A method for controlling power delivery from a transmitter to a receiver, comprising generating a control at a processor to actuate a distance measurement device. Transmitting the control to the distance measurement device. Activating the distance measurement device to measure a distance between a transmitter and a receiver. Transmitting a data packet from the distance measurement device to the processor that contains a plurality of data fields that have a value that represents the distance. Determining whether the distance is less than a predetermined threshold using the processor. Generating an error signal if the distance is less than the predetermined threshold to prevent the transmitter from generating an electromagnetic field that would cause damage to the receiver. Setting a ping signal strength as a function of the distance. Generating an electromagnetic field as a function of the ping signal strength.

Adaptive ping method for wireless charging system with wide charge distance

A wireless charging receiver that provides power delivered from a transmitter over a wireless path. The receiver includes a rectifier circuit, an LC circuit coupled to the rectifier circuit and the transmitter, a single switch modulation circuit coupled to the rectifier circuit and the LC circuit, an output circuit coupled to the rectifier circuit. The receiver further comprises an in-band controller coupled to the LC circuit and the single switch modulation circuit operational to detect a reflected parameter from incident RF power. A resistance value of the single switch modulation circuit can be set in response to a detected parametric value of the LC circuit. The resistance value can be set to cause the rectifier circuit to generate one of a stable RDCV value, an increased RDCV value, and a decreased RDCV value with respect to a normal PDC value in response to the received RF power.

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Plano, TX, United States of America

Wen Cai