SLUSCD3A August   2015  – October 2015


  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 A11 Coil Specification
      2. 7.3.2 Option Select Pins
      3. 7.3.3 LED Modes
      4. 7.3.4 Foreign Object Detection (FOD) and FOD Calibration
      5. 7.3.5 Shut Down Through External Thermal Sensor or Trigger
      6. 7.3.6 Fault Handling and Indication
      7. 7.3.7 Power Transfer Start Signal
      8. 7.3.8 Power-On Reset
      9. 7.3.9 Trickle Charge and CS100
    4. 7.4 Device Functional Modes
      1. 7.4.1 Power Transfer
        1. Dynamic Power Limiting™
        2. Operating Frequency Limiting
      2. 7.4.2 Communication
  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. Capacitor Selection
        2. Current Monitoring Requirements
        3. Input Voltage Monitoring
        4. Tank Voltage Monitoring
        5. All Unused Pins
        6. Input Regulation
        7. System Input Power Requirements
        8. LED Modes
      3. 8.2.3 Application Curves
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Layout Notes
    2. 10.2 Layout Examples
  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 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

1 Features

  • Digital Controller Compatible with Wireless Power Consortium v1.2 A11 Specification
  • Designed to be Used with bq50002 Analog Front End
  • Suitable for WPC and Proprietary 5-V Wireless Power Transmitters
  • Supports Received Power up to 5 W
  • Two Chip Solution Enables High Efficiency Transmitter Designs of >75%
  • Ultra Low Standby Power, Even During Digital Ping (<30 mW)
  • Dynamic Power Limiting (DPL)™ Enables Operation from Inputs Sources with Limited Power
  • System LED Indication of Charging State and Fault Status
  • Accurate Foreign Object Detection Method (FOD) Prevents Heating of Objects Between Transmitter and Receiver Coils

2 Applications

  • WPC Compliant Wireless Chargers for Smart Phones and Wearable Applications
  • Proprietary Wireless Chargers
  • Medical and Industrial Applications
  • Car and Other Vehicle Accessories
  • See for More Information on TI’s Wireless Power Solutions

3 Description

The bq500511 is a wireless power transmitter controller that, when combined with the bq50002 analog front end device, integrates all functions required to create a Qi-compliant or proprietary 5-V transmitter. The bq500511 and bq50002 together provide a compact wireless charger solution. The bq500511 pings the surrounding environment for the receiver devices to be powered, safely engages the device, receives packet communication from the powered device and manages the power transfer according to WPC v1.2 specification.

To maximize flexibility in wireless power control applications, Dynamic Power Limiting™ (DPL) is featured on the bq500511. DPL enhances user experience by seamlessly optimizing the usage of power available from limited input supplies.

The system supports Foreign Object Detection (FOD) by continuously monitoring the efficiency of the established power transfer, protecting from power lost due to metal objects misplaced in the wireless power transfer field. Should any abnormal condition develop during power transfer, the bq500511 handles the condition and provides indication outputs. Comprehensive status and fault monitoring features enable a low cost yet robust Qi-certified wireless power system design.

The bq500511 is available in a thermally enhanced 6 mm x 6 mm, 40-pin VQFN package.

Device Information(1)

bq500511 VQFN (40) 6.00 mm x 6.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Schematic

bq500511 fbd_sluscd3.gif


bq500511 D001_SLUSCD3.gif