text.skipToContent text.skipToNavigation


Integrated Wireless Power Li-Ion Charger Receiver, Qi (WPC) Compliant


Package | PIN: YFP | 28
Temp: S (0 to 125)
Carrier: Cut Tape
Qty Price
1-9 $3.55
10-24 $3.19
25-99 $2.98
100-249 $2.67
250-499 $2.49
500-749 $2.17
750-999 $1.88
1000+ $1.84


  • Single-Stage Wireless Power Receiver
    and Li-Ion/Li-Pol Battery Charger
    • Combines Wireless Power Receiver,Rectifier, and Battery Charger in a Single, Small Package
    • 4.20-V, 4.35-V, and4.40-V Output VoltageOptions
    • Supports a Charging Current up to 1.5 A
    • 93% PeakAC-DC Charging Efficiency
  • Robust Architecture
    • 20-V Maximum Input Voltage Tolerance,
      With Input Overvoltage Protection
    • Thermal Shutdown and OvercurrentProtection
    • Temperature Monitoring and Fault Detection
  • Compatible With WPC v1.2 Qi Industry Standard
  • Power Stage Output Tracks Rectifier and Battery Voltage to Ensure Maximum Efficiency Across the Full Charge Cycle
  • Available in Small DSGBA and VQFN Packages

All trademarks are the property of their respective owners.

Texas Instruments  BQ51051BYFPT

The bq5105x device is a high-efficiency, Qi-compliant wireless power receiver with anintegrated Li-Ion/Li-Pol battery charge controller for portable applications. The bq5105xB devicesprovide efficient AC-DC power conversion, integrates the digital controller required to comply withQi v1.2 communication protocol, and provides all necessary control algorithms needed for efficientand safe Li-Ion and Li-Pol battery charging. Together with the bq500212A transmitter-sidecontroller, the bq5105x enables a complete wireless power transfer system for direct batterycharger solutions. By using near-field inductive power transfer, the receiver coil embedded in theportable device can pick up the power transmitted by transmitter coil. The AC signal from thereceiver coil is then rectified and conditioned to apply power directly to the battery.  Globalfeedback is established from the receiver to the transmitter to stabilize the power transferprocess.  This feedback is established by using the Qi v1.2 communication protocol.

The bq5105xB devices integrate a low-impedance synchronous rectifier, low-dropoutregulator (LDO), digital control, charger controller, and accurate voltage and current loops in asingle package.  The entire power stage (rectifier and LDO) use low-resistance N-MOSFETs (100-mΩtypical Rdson) to ensure high efficiency and low power dissipation.