77% Efficient 20W Flexible Wireless Power Solutions

NuVolta Technologies Inc. has developed high efficiency 20W wireless power solutions based on its integrated transmitter power management IC NUT1000. These solutions operate at 6.78MHz with NuVolta's proprietary controlled magnetic resonance technology, and achieve high efficiency with small receiver coils suitable for integrating into various mobile devices ranging from smart phones, tablets to laptop computers. With an AirFuel class-3 sized transmitter coil, a NuVolta wireless power solution can maintain well over 60% efficiency for 5V outputs over a wide charging area and at a z-distance of over 25mm (1 inch).

This allows system designers to create flexible and high efficiency user experiences never possible before. The NuVolta solutions can also power custom transmitter and receiver coils optimized for a particular application. For example, with a 43mm diameter TX coil and a 43mm diameter RX coil, both implemented as PCB windings, a NuVolta solution can reach an efficiency of 77% at 20W at an output of 19V, enough for most demanding smart phones and tablets, as well as low power laptop computers. NuVolta’s wireless power solutions will be on exhibition at CES 2016 in Las Vegas in the AirFuel Booth (#SL-4, South Hall).

NUT1000 is a power management IC integrating all key functional blocks to implement proprietary controlled magnetic resonance architecture in a power transmitter, including Power MOSFETs, gate drivers, current sensing, and I2C interface. It is in a 5mmx5mm QFN package, and can support an input voltage between 4.5V to 28V. This IC can be used for a wide range of applications, ranging from wearable devices with a fraction of a Watt to smart phones and laptop computers with tens of Watts.

“Today’s mobile devices require fast and flexible charging. Our novel technology significantly improves the efficiency, power capability and cost of wireless charging under practical charging scenarios,” explained Dr. Hengchun Mao, CTO and a founder of the Silicon Valley startup. “With a wide range of TX and RX coil shape and size, wireless chargers can be designed with high efficiency and low cost, and meet stringent power requirements of mobile devices. With a systematic consideration for a wide input voltage range, and a wide and controlled output voltage range, we make sure our wireless power solutions work very well with new power technologies such as quick charge and USB power delivery for easy and flexible user charging experience. ”

“We believe a technology breakthrough is needed to create better wireless charging experience for end customers in consumer space.” said Michael Wang, CEO and a founder of the company. “Our highly integrated ICs remove all the big hurdles hindering the adoption of magnetic resonance wireless chargers for consumer devices, and enable wireless charging to achieve the same speed as wired charging. Our solutions give customers more choices in charging experiences, including wireless charging with spatial freedom and with metal cases.”