NewEdge Technologies, Inc. NE8051

Description

The NE8051 is a highly-integrated single-chip WPC-compliant wireless power transmitter IC for power transmitter design A6/A11/A28. The device operates with the input voltage 5V or 12V, and supplies one set of external full bridge or three sets of external half-bridge inverters or three sets of external full-bridge inverters for DC/AC conversion. It controls the transferred power by modulating the switching frequency, duty-cycle and phase specified by the WPC specification for A6/A11/A28. It contains mixed-signal circuits required to demodulate and decode WPC-compliant message packets sent by the mobile device to adjust the transferred power.The NE8051 is an intelligent device that periodically pings the area surrounding the base station to detect a mobile device for charging while minimizing idle power. Once the mobile device is detected and authenticated, the NE8051 continuously monitors all communications from the mobile device, and adjusts the transmitted power accordingly by varying the switching frequency, duty cycle or phase of the inverter.The device includes over-temperature/current protection and a Foreign Object Detection (FOD) method to protect the base station and mobile device from overheating in the presence of a metallic foreign object. It manages fault conditions associated with power transfer and controls status LEDs to indicate operating modes.NE8051 shall be able to transmit power up to 5W and shall be compliant with version 1.2 standard. The NE8051 is available in an area saving 40-PIN, 5mm x 5mm QFN.

Features

 Single-Chip up to 5W solution or Wireless Power Consortium (WPC) “Qi” compliant Low power Transmitter design for A6/A11/A28

• Conforms to WPC specification 1.2 specifications
• Over-Temperature /Current protection
• Embedded MCU
• Foreign Object Detection (FOD)
• Demodulates WPC-Compliant Message Packets from Receiver

Typical applications

• Wireless Power Transmitters in: Cars and other vehicles,Furniture Built-In Wireless Chargers,Toy Power Supplies and Chargers
• WPC-Compliant Wireless Chargers for:Mobile and Start Phones,MP3 Players,Global Positioning Devices,Digital Cameras