eGaN® FETs in Low Power Wireless Energy Converters


ECS – PriME 2012
October 7 – 12, 2012

"eGaN® FETs in Low Power Wireless Energy Converters"
Speakers: Michael de Rooij, PhD; Director Applications Engineering, Efficient Power Conversion Corporation, Johan Strydom, PhD; Vice President, Applications, Efficient Power Conversion Corporation
Location: Honolulu, HI

Wireless power applications are gaining popularity in many commodity products such as charging of mobile phones. Many of the wireless power solutions have focused on induction coil solutions with operating frequencies around 200 kHz, and Class E, F and S amplifier converter topologies. Recently, however, there has been a push for operation in the lower ISM band at 6.78 MHz where traditional MOSFET technology is approaching the limit of its capability. eGaN FETs offer an alternative to MOSFETs as they can switch fast enough to be ideal for wireless applications. This article will focus on the experimental evaluation of an induction coil system using eGaN FETs in a half bridge topology wireless application operating at 6.78 MHz designed to be suitable for USB based charging with an output power up to 5 W.