NU1028

高度集成、高效率、 高功率的无线充电发射芯片

概述

NU1028 is a family of highly integrated full-bridge power stage IC optimized for wireless power transmitter solutions. The device integrates all critical functions, such as high-efficiency power FETs, low-EMI FET drivers, bootstrap circuit, 5V integrated DC/DC power supply, 3.3V (2.5V configurable) LDO and lossless current measurement. The proprietary current-measurement circuit provides the accurate current reading used for the FOD (Foreign Object Detection) power measurement, in-band communication, Q factor detection, and digital demodulation.

The IC also includes protection functions such as input under-voltage lockout, over-voltage protection, over current protection, and thermal shutdown. These provisions further enhance the reliability of the total system solution.

I2C interface is used for communication with the controller and can easily be extended to multi-coil solutions. The device is housed in a thermally enhanced 4mm×4mm QFN package.


放大

关键特性
  •       Wide Input Voltage: 4V to 28V

          Integrated High-Efficiency Full- Bridge FETs

          Integrated FET Driver Optimized for Low EMI

          Integrated 5V DC/DC for IC power supply

          Integrated 3.3V (2.5V configurable) LDO to Bias External Circuit and Provide Reference Voltage

          High-Accuracy, Lossless Current Measurement for FOD and In-Band Communication

          Integrated Lossless Q Factor Detection

          Integrated Low-Error-Rate Digital Demodulation

          Input UVLO and OVP

          Over-Current Protection

          Thermal Shutdown

          I2C Interface

          4mm´4mm QFN Package


应用
  • • Wireless Power Transmitter Compliant with WPC V1.2.4 Extended Power Profile (EPP)
  • • Wireless Power Transmitter for Consumer, Industrial, Automotive Aftermarket, and Medical Applications
  • • Motor Drivers