Evaluation board for 6W wireless power
Eggtronic has developed an evaluation board based on a RISC-V controller to prototype efficient, low-component count wireless power transfer designs for low-power applications.
The Eggtronic WaveEgg LP EVB simplifies design and reduces component for small form factor, cable-free charging of low-power devices up to 6 W
The EVB is built on Eggtronic’s proprietary, high-frequency WaveEgg architecture, which optimises performance and efficiency and reduces component count and form factor in high-performance power converter and wireless power transmission systems.
The board is aimed at wireless charging to power small, smart devices and IoT products between 0.5 W and 30W using high frequencies from some MHz to tens of MHz, including the ISM unregulated band at 6.78 – 13.56 – 27.12 MHz.
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WaveEgg offers end-to-end efficiency that is significantly higher than traditional systems, while allowing overall bill of materials (BoM) to be reduced.
At an output of 6W and a switching frequency of 2 MHz, WaveEgg achieves an efficiency of 85%. The requirement for fewer components than conventional designs further contributes to efficiency by reducing losses from non-ideal component behaviour. Additional component count reduction is possible for battery charging applications as the receiver is also capable of charging a battery through a step-down converter implementing a CC/CV mode algorithm, eliminating the need for a battery charger controller.
The EVB supports high low-load to full-load efficiency using fewer components than standard class D, class-E, class F, class Phi, and other resonant wireless power transfer standards such as Qi, and Airfuel technologies.
“Wireless power transfer technology based on conventional designs has limitations in relation to size, bill of materials and efficiency at reduced loads that limits its use for IoT and small smart devices,” says Igor Spinella, Eggtronic’s founder and CEO. “WaveEgg addresses the historical challenges of efficiency and component count for powers up to 30 W and the WaveEgg 6W LP evaluation board provides a platform for engineers to quickly and easily realise practical and commercially viable low-power wireless designs.”
WaveEgg is based on the RISC-V based Eggtronic Power Integrated Controller (EPIC) that supports control of both standard and proprietary power conversion architectures. High efficiency over the whole load range is achieved through a proprietary design that achieves zero-voltage-switching (ZVS) and quasi-zero-current-switching (quasi-ZCS) on the transmission side and ZVS+ZCS on the receiving side.
www.eggtronic.com/wireless-power/waveegg/
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