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bq51050B Wireless Power Receivers

Texas Instruments offers its bq51050B, high-efficiency, Qi v1.1-compliant, wireless power receivers and battery chargers

Image of Texas Instruments' bq51050B Wireless Power ReceiversTexas Instruments' bq51050B device is a high-efficiency, Qi-compliant, wireless power receiver with an integrated, Li-Ion/Li-Pol battery charge controller for portable applications. The bq51050B devices provide efficient AC-DC power conversion, integrate the digital controller required to comply with Qi v1.1 communication protocol, and provide all necessary control algorithms needed for efficient and safe Li-Ion and Li-Pol battery charging. Together with the bq500212A transmitter-side controller, the bq51050B enables a complete wireless power transfer system for direct battery-charger solutions. By using near-field inductive power transfer, the receiver coil embedded in the portable device can pick up the power transmitted by the transmitter coil. The AC signal from the receiver coil is then rectified and conditioned to apply power directly to the battery.  Global feedback is established from the receiver to the transmitter to stabilize the power transfer process.  This feedback is established by using the Qi v1.1 communication protocol.

The bq51050B devices integrate a low-impedance synchronous rectifier, low-dropout regulator (LDO), digital control, charger controller, and accurate voltage and current loops in a single package.  The entire power stage (rectifier and LDO) uses low-resistance N-MOSFETs (100 mΩ typical RDS(ON)) to ensure high efficiency and low power dissipation.

Features
  • 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
    • 4.2 V, 4.35 V, and 4.4 V output voltage options
    • Supports a charging current up to 1.5 A
    • 93% peak AC-DC charging efficiency
  • Compatible with WPC v1.1 Qi industry standard
  • Robust architecture
    • 20 V maximum input voltage tolerance, with input overvoltage protection
    • Thermal shutdown and overcurrent protection
    • Temperature monitoring and fault detection
  • Power stage output tracks rectifier and battery voltage to ensure maximum efficiency across the full charge cycle
  • Available in small DSGBA and VQFN packages

bq51050B Wireless Power Receivers

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
IC WIRELESS PWR RCVR 20QFNBQ51050BRHLTIC WIRELESS PWR RCVR 20QFN1642 - Immediate
10001 - Factory Stock
View Details
IC WIRELESS PWR RCVR 28DSBGABQ51050BYFPTIC WIRELESS PWR RCVR 28DSBGA1664 - Immediate
5750 - Factory Stock
View Details
IC WIRELESS PWR RCVR 28DSBGABQ51050BYFPRIC WIRELESS PWR RCVR 28DSBGA10001 - Factory StockView Details

Evaluation Board

ImageManufacturer Part NumberDescriptionTypeEmbeddedUtilized IC / PartAvailable QuantityView Details
EVAL BOARD FOR BQ51050BQ51050BEVM-764EVAL BOARD FOR BQ51050Power Management-BQ51050B5 - ImmediateView Details
Published: 2016-09-01