GaN Wireless Power Handbook 2nd Edition

By EPC 52

GaN Wireless Power Handbook 2nd Edition

Since Nikola Tesla first experimented with wireless power, there has been a quest to “cut the cord” of electrical power and go wireless. Now, over 100 years later, the technological capability to achieve Tesla’s vision is here.

Highly resonant wireless power transfer, based on the generation of magnetic fields, has proven to be a viable path. Magnetic fields are considered safe and offer other necessary requisites, such as ease-of-use and robustness.

A major challenge for implementing wireless power is the design of the amplifier. From experimental results presented in EPC's Wireless Power Handbook, it is clear that the ZVS class D topology, fitted with eGaN® power transistors, provides the best solution. With their low capacitance, zero reverse recovery, and low on-resistance, eGaN FETs ensure low operating losses leading to higher amplifier efficiency and help keep EMI generation low. These devices have a very small footprint and low profile, which is important for mobile and medical applications.

The aim of this handbook is to understand the many challenges to designing an amplifier for wireless power, such as radiated EMI, multi-mode systems, and ways to improve efficiency.

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