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Features

  • 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 and PMA Compliant Communication
  • Patented Transmitter Pad Detect Function
    Improves User Experience
  • I2C Communication with Host
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Description

The bq51221 device is a fully contained wireless power receiver capable of operating in both the WPC and PMA protocols which allows a wireless power system to work with both WPC and PMA inductive charging standards. The bq51221 device provides a single device power conversion (rectification and regulation) as well as the digital control and communication for both standards. It also has autonomous detection of protocol and requires no additional active devices. The bq51221 device complies with the WPC v1.1 and PMA communication protocol. Together with the WPC or a PMA primary-side controller, the bq51221 device enables a complete wireless power transfer system for a wireless power supply solution. The receiver allows for synchronous rectification, regulation and control and communication to all exist in a market-leading form factor, efficiency, and solution size.

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Technical documentation

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Type Title Date
* Datasheet bq51221 Dual Mode 5-W (WPC and PMA) Single Chip Wireless Power Receiver datasheet (Rev. A) Jul. 11, 2014
Technical articles When to use rechargeable batteries in small battery applications Oct. 01, 2019
Technical articles Should I use a linear charger or a switching charger? Oct. 30, 2015
Technical articles The challenge of implementing higher-power wireless charging Jun. 11, 2015
Technical articles Wireless charging finally goes mainstream! Mar. 11, 2015
Application note Test and Troubleshoot a Wireless Power Receiver Aug. 06, 2014
User guide Dual Mode (WPC and PMA) Integrated Wireless Receiver Power Supply (Rev. B) Jun. 05, 2014
Application note Layout Guidelines for Wireless Power Receiver (Generation 3 Mar. 28, 2014

Design & development

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

Software development

GUI FOR EVALUATION MODULE (EVM) Download
SLUC575.ZIP (1027 KB)

Design tools & simulation

CALCULATION TOOL Download
SLUC577A.ZIP (60490 KB)
GERBER FILE Download
SLUC560.ZIP (366 KB)

Reference designs

REFERENCE DESIGNS Download
Miniature Dual Mode Wireless Receiver
TIDA-00243 This board is a SFF (Small Form Factor) complete miniature wireless receiver solution. The output is 5Vdc @1A and you can use it to power, or charge your battery operated device using any industry standard WPC or PMA compliant transmitter.
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