21 September 2017
EPC presenting GaN-based large-surface-area wireless power solution at Wireless Power Summit
At the Wireless Power Summit 2017 in the Embassy Suites Hotel Downtown, Denver, CO (5-6 October) , Efficient Power Conversion Corp (EPC) of El Segundo, CA, USA - which makes enhancement-mode gallium nitride on silicon (eGaN) power field-effect transistors (FETs) for power management applications - is exhibiting a wireless power tabletop highlighting the capability of GaN-based magnetic resonance technology to provide wireless power over a large surface area to many receiving devices (such as cell phones, laptop computers, and table lamps) simultaneously.
The future of wireless power and its eventual ubiquitous adoption is dependent on the ability of end users to place any electrical item on a surface and have it powered without having to ‘plug in’, says EPC. The fundamental technology to achieve this ‘drop-and-go’ power is defined by the AirFuel Alliance standard.
eGaN FETs and ICs, operating at 6.78MHz, are featured in the amplifiers that power the transmit coils of the wireless power surface and in the receive circuits used in the devices placed on the surface. eGaN technology is suitable for wireless power applications due to its ability to operate at high frequency, high voltage, and high power, says EPC. The wireless power table being demonstrated at the Summit is capable of delivering a total of 165W of power, enabling simultaneous powering of multiple devices.
Several eGaN products are critical to the wireless power table design. Specifically, the amplifier on the transmit side of the table uses the EPC9512 power amplifier. The amplifier takes advantage of the performance of the EPC8010 as the main power stage FET, the EPC2038 as the synchronous bootstrap FET and the EPC2019 is critical in the SEPIC pre-regulator. On the receive side, the EPC2019 is also used as a boost FET to accommodate the multiple power levels of the receive devices to be placed on the tabletop, which range from 5W for cell-phone charging to 25W to power the laptop.
The Wireless Power Summit will also provide wireless power industry forecasts, showcase the latest technologies, and give current insights into the wireless power market.