SLUSCD3A August 2015  – October 2015

PRODUCTION DATA. 

  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. 7.3.1A11 Coil Specification
      2. 7.3.2Option Select Pins
      3. 7.3.3LED Modes
      4. 7.3.4Foreign Object Detection (FOD) and FOD Calibration
      5. 7.3.5Shut Down Through External Thermal Sensor or Trigger
      6. 7.3.6Fault Handling and Indication
      7. 7.3.7Power Transfer Start Signal
      8. 7.3.8Power-On Reset
      9. 7.3.9Trickle Charge and CS100
    4. 7.4Device Functional Modes
      1. 7.4.1Power Transfer
        1. 7.4.1.1Dynamic Power Limiting™
        2. 7.4.1.2Operating Frequency Limiting
      2. 7.4.2Communication
  8. Application and Implementation
    1. 8.1Application Information
    2. 8.2Typical Application
      1. 8.2.1Design Requirements
      2. 8.2.2Detailed Design Procedure
        1. 8.2.2.1Capacitor Selection
        2. 8.2.2.2Current Monitoring Requirements
        3. 8.2.2.3Input Voltage Monitoring
        4. 8.2.2.4Tank Voltage Monitoring
        5. 8.2.2.5All Unused Pins
        6. 8.2.2.6Input Regulation
        7. 8.2.2.7System Input Power Requirements
        8. 8.2.2.8LED Modes
      3. 8.2.3Application Curves
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1Layout Guidelines
      1. 10.1.1Layout Notes
    2. 10.2Layout Examples
  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. 11.3Community Resources
    4. 11.4Trademarks
    5. 11.5Electrostatic Discharge Caution
    6. 11.6Glossary
  12. 12Mechanical, Packaging, and 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 www.ti.com/wirelesspower 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)

PART NUMBERPACKAGEBODY SIZE (NOM)
bq500511VQFN (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

Efficiency

bq500511 D001_SLUSCD3.gif