BQ51021 5-W (WPC) Single-Chip Wireless Power Receiver with I2C |

BQ51021 (ACTIVE)

5-W (WPC) Single-Chip Wireless Power Receiver with I2C

5-W (WPC) Single-Chip Wireless Power Receiver with I2C - BQ51021


The bq5102x device is a fully contained wireless power receiver capable of operating with the WPC v1.1 protocol which allows a wireless power system to deliver up to 5 W to the system when used with a Qi inductive transmitter. The bq5102x device provides a single device power conversion (rectification and regulation) as well as the digital control and communication for WPC specification. With market-leading efficiency and adjustable output voltage, the bq5102x device allows for unparalleled efficiency and system optimization. I2C also allows system designers to implement interesting new features such as aligning a receiver on the transmitter surface, or detecting foreign objects on the receiver. The receiver allows for synchronous rectification, regulation and control and communication to all exist in a market leading form factor, efficiency, and solution size.

For all available packages, see the orderable addendum at the end of the data sheet.


  • 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 v1.1 Compliant Communication
  • Patented Transmitter Pad Detect Function Improves User
  • Alignment Feature Through I2C Allows for User
    Training to Find Best Position on Surface of TX

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Parametrics Compare all products in Battery charger ICs

Operating temperature range (C)
Package Group
Package size: mm2:W x L (PKG)
BQ51021 BQ51003 BQ51013B BQ51221 BQ51222
Receiver     Receiver     Receiver     Receiver     Receiver    
Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 125     -40 to 85     0 to 125     -40 to 85     -40 to 125    
DSBGA | 42     DSBGA | 28     DSBGA | 28
VQFN | 20    
DSBGA | 42     DSBGA | 42    
See datasheet (DSBGA)     See datasheet (DSBGA)     See datasheet (DSBGA)
20VQFN: 16 mm2: 3.5 x 4.5 (VQFN | 20)    
See datasheet (DSBGA)     See datasheet (DSBGA)