SLUSBB1B December   2012  – June 2016

 

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 Recommended Operating Conditions
    3. 6.3 Thermal Information
    4. 6.4 Electrical Characteristics
    5. 6.5 Typical Characteristics Curves
  7. 7 Detailed Description
    1. 7.1 Overview
      1. 7.1.1 Fundamentals
      2. 7.1.2 Wireless Power Consortium (WPC)
      3. 7.1.3 Power Transfer
      4. 7.1.4 Communication
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Dynamic Power Limiting™
      2. 7.3.2  Option Select Pin
      3. 7.3.3  LED Indication Modes
      4. 7.3.4  Parasitic Metal Object Detect (PMOD) and Foreign Object Detection (FOD)
      5. 7.3.5  Shut Down via 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  External Reset, RESET Pin
      10. 7.3.10 Trickle Charge and CS100
      11. 7.3.11 Current Monitoring Requirements
      12. 7.3.12 Overcurrent Protection
      13. 7.3.13 MSP430G2001 Low Power Supervisor
        1. 7.3.13.1 MSP430 Low Power Supervisor Details
      14. 7.3.14 All Unused Pins
  8. 8 Application and Implementation
    1. 8.1 Typical Application
      1. 8.1.1 Detailed Design Procedure
        1. 8.1.1.1 Coils and Matching Capacitors
        2. 8.1.1.2 Input Regulator
        3. 8.1.1.3 Power Train
        4. 8.1.1.4 Low Power Supervisor
        5. 8.1.1.5 Disabling Low Power Supervisor Mode
  9. 9 Layout
    1. 9.1 Layout Guidelines
  10. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Community Resources
    3. 10.3 Trademarks
    4. 10.4 Electrostatic Discharge Caution
    5. 10.5 Glossary
  11. 11Mechanical, Packaging, and Orderable Information

Package Options

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

1 Features

  • Intelligent Control of Wireless Power Transfer
  • 5-V Operation Conforms to Wireless Power Consortium (WPC) Type A5 and Type A11 Transmitter Specifications
  • WPC1.1 Compliant, Including Foreign Object Detection (FOD)
  • Enhanced Parasitic Metal Detection (PMOD) Assures Safety
  • Dynamic Power Limiting™ for USB and Limited Source Operation
  • Digital Demodulation Reduces Components
  • LED Indication of Charging State and Fault Status

2 Applications

  • WPC 1.1 Compliant Wireless Chargers For:
    • Qi-Certified Smart Phones and other Handhelds
    • Hermetically Sealed Devices and Tools
    • Cars and Other Vehicles
    • Tabletop Charge Surfaces
  • See www.ti.com/wirelesspower for More Information on TI's Wireless Charging Solutions

3 Description

The bq500211A is a second generation digital wireless power controller that integrates all functions required to control wireless power transfer to a single WPC compliant receiver. It is WPC1.1 compliant and designed for 5-V systems as either a WPC type A5 transmitter with a magnetic positioning guide or as a WPC type A11 transmitter without the magnetic guide. The bq500211A 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. To maximize flexibility in wireless power applications, Dynamic Power Limiting™ (DPL) is featured on the bq500211A. DPL enhances user experience by seamlessly optimizing the usage of power available from limited input supplies. The bq500211A supports both Foreign Object Detection (FOD) and Parasitic Metal Object Detection (PMOD) by continuously monitoring the efficiency of the established power transfer, protecting from power lost due to metal objects misplaced in the wireless power transfer bath. Should any abnormal condition develop during power transfer, the bq500211A handles it and provides indicator outputs. Comprehensive status and fault monitoring features enable a robust system design.

The bq500211A is available in a 48-pin, 7 mm x 7 mm QFN package and operates over a temperature range from –40°C to 110°C.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
bq500211A VQFN (48) 7.00 mm × 7.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Functional Diagram

bq500211A flo_lusbb1.gif

Efficiency vs System Output Power

bq500211A eff_v_pout_lusao2.png