Tuesday, June 27, 2017 - Thursday, June 29, 2017
PCIM Asia 2017 Conference
Location: Shanghai, China
Comparison of 6.78 MHz Amplifier Topologies for High Power, Highly Resonant Wireless Power Transfer
Presenter: Michael de Rooij, Ph.D., Vice President of Applications Engineering
Experimentally verified differential mode versions of the class E and ZVS class D topologies, built using eGaN® FETs, capable of highly resonant wireless power transfer to power and charge small laptop computers while operating at 6.78 MHz based on the AirFuel™ Class 4  standard at 33 W are compared. The results show greater than 85% amplifier efficiency over the entire full power load range capability can be achieved for either topology without exceeding 80% FET voltage rating or 100°C thermal limit while operating in a 25°C ambient.
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