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Texas Instruments - BQ51222

Dual Mode 5-W (WPC v1.2 and PMA) Single Chip Wireless Power Receiver

The bq51222 device is a fully contained wireless power receiver capable of operating in both the Wireless Power Consortium (WPC) Qi and Power Matters Alliance (PMA) protocols which allows a wireless power system to work with both inductive charging standards. The bq51222 device provides a single device power conversion (rectification and regulation) as well as the digital control and communication for both standards. It also has autonomous detection of protocol and requires no additional active devices. The bq51222 device complies with the WPC v1.2 and PMA communication protocol. Together with the WPC or a PMA primary-side controller, the bq51222 device enables a complete wireless power transfer system for a wireless power supply solution. The receiver allows for synchronous rectification, regulation and control and communication to all exist in a market-leading form factor, efficiency, and solution size.


  • Robust 5-W Solution with 50% Lower Losses for Improved Thermals
    • Inductorless Receiver for Lowest Height Profile Solution
    • Adjustable Output Voltage (4.5 to 8 V) for Coil and Thermal Optimization
    • Fully Synchronous Rectifier with 96% Efficiency
    • 97% Efficient Post Regulator
    • 79% System Efficiency at 5 W
  • WPC v1.2 and PMA Compliant Communication
  • Patented Transmitter Pad Detect Function Improves User Experience
  • I2C Communication with Host

Target applications

  • Smart Phones, Tablets, and Headsets
  • Wi-Fi Hotspots
  • Power Banks
  • Other Handheld Devices

Key benefits

  • Allows flexibility supporting charging stations of both standards
  • Reduce power consumption and better thermal performance
  • Indicates to the host that the Rx is placed on the charging surface, even after charge is terminated
  • Allows customer to adjust output voltage as well as other key parameters for system flexibility


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