Wireless Charging Using a Simple dsPIC

March 19, 2018 Rich Nass

Wireless charging is an area that doesn’t seem to get enough publicity, as it really can be a game-changer for charging. This was one of the technologies that was on display at the recent APEC show. One vendor who put a spotlight on it was Microchip, with its 15-W wireless power transmitter board (it’s actually a dev board, making it easy for you to design your own prototype).

The board is based on the company’s dsPIC digital signal controller and is compatible with Qi medium power receivers. The board enables a system efficiency of about 80% at full load and includes LEDs for both status power-level indication.

The dsPIC includes a CPU core, multiple PWM generators, and advanced analog modules. The multiple PWMs allow for control of the full bridge inverter and a front-end buck-boost converter (required for fixed frequency topologies). The dsPIC can also operate in environments where the final solution requires a proprietary protocol.

The bundled software structure can be setup such that basic kernel functions are packaged in library form; add-on/customized functions are provided as API interfaces.

About the Author

Rich Nass

Richard Nass is the Executive Vice-President of OpenSystems Media. His key responsibilities include setting the direction for all aspects of OpenSystems Media’s Embedded and IoT product portfolios, including web sites, e-newsletters, print and digital magazines, and various other digital and print activities. He was instrumental in developing the company's on-line educational portal, Embedded University. Previously, Nass was the Brand Director for UBM’s award-winning Design News property. Prior to that, he led the content team for UBM Canon’s Medical Devices Group, as well all custom properties and events in the U.S., Europe, and Asia. Nass has been in the engineering OEM industry for more than 25 years. In prior stints, he led the Content Team at EE Times, handling the Embedded and Custom groups and the TechOnline DesignLine network of design engineering web sites. Nass holds a BSEE degree from the New Jersey Institute of Technology.

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