SLUSBD6D July   2013  – July 2016


  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  6. Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Principles of Operation
        1. Fundamentals
        2. Wireless Power Consortium (WPC)
        3. Power Transfer
        4. Communication
      2. 7.3.2 Dynamic Power Limiting
      3. 7.3.3 Shut Down Through External Thermal Sensor or Trigger
      4. 7.3.4 Fault Handling and Indication
      5. 7.3.5 Power Transfer Start Signal
      6. 7.3.6 Power On Reset
      7. 7.3.7 External Reset, RESET Pin
      8. 7.3.8 Trickle Charge and CS100
    4. 7.4 Device Functional Modes
      1. 7.4.1 LED Indication Modes
      2. 7.4.2 Low Power Mode
    5. 7.5 Programming
      1. 7.5.1 Option Select Pins
      2. 7.5.2 Current Monitoring Requirements
      3. 7.5.3 All Unused Pins
  8. Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. PMOD, FOD, and FOD Calibration
        2. Coils and Matching Capacitors
        3. Design Checklist for WPC1.1 Compliance With the bq500212A
        4. Input Regulator
        5. Power Train
      3. 8.2.3 Application Curves
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Community Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • Proven, Qi-Certified Value Solution for Transmit-Side Application
  • Lowest Device Count for Full WPC1.1 5-V Solution
  • 5-V Operation Conforms to Wireless Power Consortium (WPC1.1) Type A5 or A11 Transmitter Specification
  • Fully WPC Compliant, Including Improved Foreign Object Detection (FOD) Method
  • Permits X7R Type Resonant Capacitors for Reduced Cost
  • Dynamic Power Limiting™ for USB and Limited Source Operation
  • Digital Demodulation Reduces Components
  • LED Indication of Charging State and Fault Status
  • Low Standby and High Efficiency

2 Applications

  • Wireless Power Consortium (WPC1.1) Compliant Wireless Chargers for:
    • Qi-Certified Smart Phones and Other Handhelds
    • Car and Other Vehicle Accessories
  • See for more information on TI's Wireless Charging Solutions

3 Description

The bq500212A is a Qi-certified value solution that integrates all functions required to control wireless power delivery to a single WPC1.1 compliant receiver. It is WPC1.1 compliant and designed for 5-V systems as a wireless power consortium type A5 or A11 transmitter. The bq500212A pings the surrounding environment for WPC compliant devices to be powered, safely engages the device, receives packet communication from the powered device and manages the power transfer according to WPC1.1 specification. To maximize flexibility in wireless power control applications, Dynamic Power Limiting (DPL) is featured on the bq500212A. Dynamic Power Limiting enhances user experience by seamlessly optimizing the usage of power available from limited input supplies.

The bq500212A supports both foreign object detection (FOD) and enhanced parasitic metal object detection (PMOD) for legacy product by continuously monitoring the efficiency of the established power transfer, protecting from power loss due to metal objects misplaced in the wireless power transfer field. The bq500212A handles any abnormal condition development during power transfer and provides indicator outputs. Comprehensive status and fault monitoring features enable a low cost yet robust, Qi-certified wireless power system design.

The bq500212A is available in a 48-pin, 7mm × 7mm VQFN package.

Device Information(1)

bq500212A VQFN (48) 7.00 mm × 7.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

System Diagram

bq500212A fig1_v13117_lusbd6.gif

Efficiency vs System Output Power

bq500212A D002_SLUSBD6D.gif