In 2018 Navitas Semiconductor announced what they define the world’s smallest, fastest-charging mobile adapter. Its schematic is built around a GaNFast power ICs delivering 5x greater power than standard smartphone chargers with 2x higher power density.
In the same year, Texas Instruments presented the design of a 70W AC/DC Flyback converter with a power density of about 30W per cubic inch. Practiacally, this would be a power adapter that is 4 times smaller than the 2018 Apple Powerbook wall power adapter.
In this repository you can find an open-source KiCad implementation of a very similar 70W Flyback converter.
Electronic Schematic
Printed Circuit Board
This is the 2 layer PCB designed.
All major developments into high-desity AC/DC flyback converters are done around fancy GaN Mosfets that are not so readly available. For instance, the Texas Intruments TIDA-01622 schematic is built around the Navitas Semiconductor NV6117 and the NV6115.
At the time of writing (04/2018) the only GaN Mosfet available to me is the Panasonic PGA26E07BA or the cheaper PGA26E19BA. Both GaN FET would probably require a driver, the Panasonic AN34092B.
The datasheet of all mentioned components are available in the /PDF folder.
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