Controller aims to boost magnetic resonance wireless charging in laptops

January 05, 2017 // By Nick Flaherty
WiTricity is aiming to boost the development of wireless magnetic resonance charging with the launch of a controller being used in the first laptop.

The WT8800 Wireless Charging Controller incorporates WiTricity’s magnetic resonance technology and proprietary design techniques to allow consumer brands to build wirelessly-powered products that work at the same speed as wired chargers. It is being used in the Dell Latitude 7285 2-in-1 laptop (above) launched at the Consumer Electronics Show in Las Vegas this week.

"WiTricity's wireless charging technology makes it possible to integrate magnetic resonance in today's thin, iconic computing products,” said  said Neil Hand, VP Product Strategy and Innovation at Dell. "Dell continues their drive to be first to market with relevant new technology. This collaboration between Dell and WiTricity is making the wireless workplace a reality for customers around the globe," said Alex Gruzen, CEO of WiTricity. "The Dell Latitude 7285 accelerates establishment of a broader magnetic resonance-powered wireless charging ecosystem for a wide range of devices.”

Consumer demand is growing for wireless charging experiences that are flexible and efficient. Solutions currently on the market that require precise alignment between device and power source are not meeting that demand. WiTricity’s magnetic resonance technology enables spatial freedom, the ability to charge through materials and the charging of multiple devices with the same source.

The WT8800 controller brings its magnetic resonance technology to products, enabling wireless power transmitters with scalable output power, ranging from a few Watts to 100W for wearables, smartphones, laptops and other devices. The mixed signal System on Chip (SoC) architecture integrates the complete analogue and digital controller functions of a Power Transmitter Unit (PTU) compliant with the AirFuel Alliance's Resonant Wireless Charging Standard, ensuring compatibiity with the rest of the AirFuel ecosystem. The specific functions integrated include functionality to control the DC bus voltage, power amplifier and user interface. It also incorporates all appropriate safety features including current, voltage and temperature monitoring. The 10 x 10mm chip allows up to 30 W of power to a single coil measuring 15cm x 10cm, with 30mm of flexibility in the placement of the deivce to be charged.   

AirFuel-certified Wireless Power Transmitter system