Resonant Full-Bridge Synchronous Rectifier Utilizing 15 V GaN Transistors for Wireless Power Transfer Applications Following AirFuel Standard Operating at 6.78 MHz

Christopher Have Kiaerskou Jensen, Frederik Monrad Spliid, Jens Christian Hertel, Yasser Nour, Tiberiu-Gabriel Zsurzsan, Arnold Knott

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

1101 Downloads (Pure)

Abstract

Connectivity in smart devices is increasingly realized by wireless connections. The remaining reason for using connectors at all is for charging the internal battery, for which wireless power transfer is an alternative. Two industry standards, AirFuel and Qi, exist to support compatibility between devices. This work is focusing on the AirFuel standard, as it is operating at a higher frequency (6.78 MHz), than the Qi standard, and therefore allows smaller passive components, including the coupling coils. Whereas gallium-nitride (GaN) devices are being widely used on the transmitter (Tx) side, this work uses low voltage GaN transistors on the receiver (Rx) side to allow synchronous rectification and soft switching, thereby achieving high efficiency. After analyzing adequate Class-DE rectifier topologies, a ClassDE full-bridge 5 W rectifier using 15 V GaN transistors are designed and implemented. The experimental results show an efficiency above 80 % over a wide operating range and a peak efficiency of 89 %, at an arbitrary alignment of Tx and Rx coils with 3 cm distance between them.
Original languageEnglish
Title of host publicationProceedings of 2018 IEEE Applied Power Electronics Conference and Exposition
Number of pages7
PublisherIEEE
Publication date2018
Pages3131-3137
DOIs
Publication statusPublished - 2018
Event2018 IEEE Applied Power Electronics Conference and Exposition - Henry B. Gonzalez Convention Center, San Antonio, United States
Duration: 4 Mar 20188 Mar 2018

Conference

Conference2018 IEEE Applied Power Electronics Conference and Exposition
LocationHenry B. Gonzalez Convention Center
CountryUnited States
CitySan Antonio
Period04/03/201808/03/2018

Keywords

  • Wireless power transfer
  • AirFuel
  • Synchronous rectification
  • Resonant circuit
  • soft-switching
  • GaN devices

Fingerprint Dive into the research topics of 'Resonant Full-Bridge Synchronous Rectifier Utilizing 15 V GaN Transistors for Wireless Power Transfer Applications Following AirFuel Standard Operating at 6.78 MHz'. Together they form a unique fingerprint.

Cite this