A Synchronous eGaN® FET Class E Rectifier for a 30 W Highly Resonant Wireless Power Receivers

Conference: PCIM Asia 2018 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
06/26/2018 - 06/28/2018 at Shanghai, China

Proceedings: PCIM Asia 2018

Pages: 6Language: englishTyp: PDF

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Rooij, Michael de; Zhang, Yuanzhe (Efficient Power Conversion, USA)

6.78 MHz highly resonant wireless power receivers based on the AirFuel(TM) standard experience high rectifier losses when using Schottky diodes and can fail to meet the thermal limit requirements for many products such as laptops. This work introduces a rectifier based on a synchronous switch eGaN FET in a class E topology for use in 30 W highly resonant wireless power receivers. Results show that the proposed class E rectifier achieved 20% lower loss in system power stage and higher system efficiency compared to a Schottky diode full-bridge rectifier.