SLUSBD6D July 2013  β€“ July 2016


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

Package Options

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, 7‑mm × 7‑mm VQFN package.

Device Information(1)

bq500212AVQFN (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