BQ51003 Wireless Power Receiver  - BQ51003

BQ51003 (ACTIVE)

BQ51003 Wireless Power Receiver



The bq51003 is an advanced, integrated, receiver IC for wireless power transfer in portable applications optimized for 2.5-W and below applications. The device provides the AC-DC power conversion while integrating the digital control required to comply with the Qi v1.2 communication protocol. Together with the bq500210 transmitter controller, the bq51003 enables a complete contact-less power transfer system for a wireless power supply solution. By using near-field inductive power transfer, the receiver coil embedded in the portable device receives the power transmitted by the transmitter coil through mutually coupled inductors. The AC signal from the receiver coil is then rectified and regulated to be used as a power supply for down-system electronics. Global feedback is established from the secondary to the transmitter to stabilize the power transfer process through back-scatter modulation. This feedback is established by using the Qi v1.2 communication protocol supporting up to 2.5-W applications.

The device integrates a low-impedance full synchronous rectifier, low-dropout regulator, digital control, and accurate voltage and current loops.


  • Integrated Wireless Power Supply Receiver Solution - Optimized for 2.5-W Applications
    • 93% Overall Peak AC-DC Efficiency
    • Full Synchronous Rectifier
    • WPC v1.2 Compliant Communication Control
    • Output Voltage Conditioning
    • Only IC Required Between Rx coil and Output
  • Wireless Power Consortium (WPC) v1.2 Compliant (FOD Enabled) Highly Accurate Current Sense
  • Dynamic Rectifier Control for Improved Load Transient Response
  • Dynamic Efficiency Scaling for Optimized Performance Over Wide Range of Output Power
  • Adaptive Communication Limit for Robust Communication
  • Supports 20-V Maximum Input
  • Low-power Dissipative Rectifier Overvoltage Clamp (VRECT-OVP = 15 V)
  • Thermal Shutdown
  • Multifunction NTC and Control Pin for Temperature Monitoring, Charge Complete and Fault Host Control

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Parametrics Compare all products in Wireless Power Solutions

Pout (Typ) (W)
Vrect (reg) (V)
Iout (Max) (A)
Vout (regulated) (V)
Operating Temperature Range (C)
BQ51003 BQ51010B BQ51013B BQ51020 BQ51021 BQ51050B BQ51221 BQ51222
Receiver    Receiver    Receiver    Receiver    Receiver    Receiver    Receiver    Receiver   
2.5    5    5    5    5    5    5    5   
WPC 1.1    WPC 1.1    WPC 1.1    WPC 1.1    WPC 1.1    WPC 1.1    WPC 1.1 and PMA    WPC 1.2 and PMA   
Dynamic    Dynamic    Dynamic    Dynamic    Dynamic    Tracks (Vbat+300mV)    Dynamic    Dynamic   
0.5    0.75    1.5    1    1    1.5    1    1   
5    7    5    8    8    4.2    8    8   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
-40 to 85    -40 to 85      -40 to 125    -40 to 125      -40 to 85    -40 to 125   
28DSBGA    28DSBGA    20VQFN
42DSBGA    42DSBGA    20VQFN