Product details

Rating Catalog
Rating Catalog
DSBGA (YFP) 28 0 mm² 1.922 x 3.046
  • 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
  • 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

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 bq500212A 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.

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 bq500212A 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.

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Technical documentation

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Type Title Date
* Data sheet bq51003 Highly Integrated Wireless Receiver Qi (WPC v1.2) Compliant Power Supply datasheet (Rev. C) 30 Jul 2018
Technical article When to use rechargeable batteries in small battery applications 01 Oct 2019
Technical article Wireless power during the zombie apocalypse 28 Oct 2016
Test report Power Management Reference Design for a Wearable Device with Wireless Charging (Rev. A) 14 Apr 2016
Technical article Should I use a linear charger or a switching charger? 31 Oct 2015
Technical article The most popular battery charging solutions for wearables 20 Apr 2015
More literature Adapting Qi-compliant wireless-power solutions to low-power wearable products 06 Jun 2014
User guide bq51003EVM-764 Evaluation Module (WCSP Package) 23 Nov 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Calculation tool

Foreign Object Detection (FOD) Calibration/Tuning Tool (Rev. A)

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Reference designs

PMP11311 — Power Reference Design for a Wearable Device with Wireless Charging using the bq51003 and bq25120

Wearable devices require advanced power management to achieve long battery run times with always-on functionality.  Additionally, the devices need to use small rechargeable batteries and enable small footprint designs.  This application note shows the implementation of a scalable power (...)
Reference designs

TIDA-00881 — 50mA Wireless Charger with 19mm Coil BoosterPack Reference Design

The TIDA-00881 reference design is a booster pack that provides a wireless charger and an entire battery managment solution to power any low power TI Launchpad. This design is a  highly integrated power management solution that is well-suited for ultra-low power applications using an off the (...)
Reference designs

TIDA-00712 — Smartwatch Battery Management Solution Reference Design

This reference design is for smartwatch battery management solution (BMS). It is suitable for low-power wearable devices like smartwatch applications. The design includes an ultra-low current 1 cell Li-ion linear charger; a highly integrated Qi-compliant wireless power receiver; a (...)
Reference designs

TIDA-00668 — 50mA Wireless Charger Booster Pack Reference Design

The TIDA-00668 is a booster pack that provides a wireless charger and an entire battery managment solution to power any low power TI Launchpad. This design is a highly integrated power management solution that is well-suited for ultra-low power applications.

The primary method of storage is an (...)

Reference designs

TIDA-00318 — Qi (WPC) Compliant Wireless Charger for Low Power Wearable Applications

This reference design is suitable for low power wearable devices including a Qi-compliant wireless receiver (bq51003) and ultra-low current 1-cell Li-ion linear charger (bq25100). It features an ultra-small size (5 x 15 mm2), capable of low-charging currents down to 10 mA and up to 250 mA with (...)
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