Innovative Power IC Design

The Nuvolta team combines advanced BCD processes and power switch engineering, and state-of-the-art high frequency mixed-signal designs to create system-oriented power ICs. Nuvolta’s proprietary ICs integrate power conversion, signal processing, and intelligent system control together to simplify system design and optimize the cost, size, and performance of wireless charging and other demanding applications. Critical system functions and system components, such as accurate current sensing and control for power switches, A/D and digital interface, and high frequency capacitors, can all be incorporated in the ICs.

Semiconductor Variable Capacitance

Based on advanced semiconductor technology and a proprietary topology, Nuvolta has developed a high-efficiency variable-capacitor technology and used it to improve the performance of resonators in wireless power and other applications. These capacitors can stand high voltages and high currents with very low distortion and good control resolution, and thus can be used in demanding applications such as in magnetic resonance wireless power transfer at 6.78MHz or higher frequencies.

System Design

Nuvolta’s proprietary actively-controlled resonant power conversion technology enables power switches to operate in an optimum soft-switching condition, thus significantly reducing their power loss, voltage/current stresses, and switching noise. This allows power MOSFET in silicon to operate at high switching frequencies efficiently and reliably, enabling high performance and low cost wireless power applications with magnetic resonance. With a strong capability of modelling all key components from resonator coils, power switches, to digital control, the Nuvolta team can utilize advanced component and IC designs to develop high-performance system solutions based on comprehensive electromagnetic simulation and analysis.

Controlled Resonance Power Architecture

Magnetic resonance technology allows spatial freedom in a wireless power system. Nuvolta’s Controlled Resonance power architecture modulates the resonant tanks in transmitters and receivers, so the right amount of power is transferred between them with highly desirable benefits:

• Minimizing power losses and stresses on active switches and passive components;

• Simplifying power regulation and eliminating unnecessary power processing stages;

• Reducing the cost and size of resonator coils and total solutions.

Implemented with the company’s proprietary ICs and coil designs, the controlled resonance power architecture can realize efficient and low cost wireless chargers from low power to high power, covering applications from wearable devices to electrical vehicles. Furthermore, wireless charging through metal barrier is possible with this architecture, giving system designers more freedom to optimize user experiences.