Development kit links transmitter and receiver coils to transfer data

Würth Elektronik eiSos and Infineon Technologies have partnered to offer a 200W development system for wireless power transfer. It is distinguished by the fact that the link between the transmitter and receiver coils can be used to transfer not only power but also data.

The 760308EMP-WPT-200W development kit comprises a power supply, a transmitter unit and a receiver unit, using products from Würth Elektronik and Infineon (MOSFETS, drivers, microcontrollers and voltage regulators).

The transmitter side consists of a full bridge and a resonant circuit made up of the wireless power transmission (WPT) coil and the resonant capacitors connected in series. Due to the phase shift between voltage and current in the resonant circuit, the system operates in zero voltage switching (ZVS) mode for a high level of efficiency, says Infineon.

On the receiver side, a synchronous rectifier with downstream filtering and sieving. Thanks to the AM modulation of the alternating field between transmitter and receiver, any data can be sent from the receiver side to the transmitter side. The kit can be used for a mobile device that sends sensor data to a basestation during the charging process. All the data needed to implement this kind of proprietary system is offered for free download.

Verena Lackner, global application marketing for wireless charging at Infineon, said: “Wireless charging is a key topic for Infineon, and together with Würth Elektronik we can use this system solution to effectively support customers in various design challenges”.

The 200-W-WPT will be available from Q3 2018.

Würth Elektronik eiSos is a manufacturer of electronic and electromechanical components for the electronics industry, with manufacturing facilities in Europe, Asia and North America. The company’s product portfolio covers EMC components, inductors, transformers, HF components, varistors, capacitors, power modules, LEDs, connectors, power elements, wireless power coils, switches, assembly technology and fuse holders.

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