SLUSEE3 July   2021 BQ51013B-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Device Comparison Table
  7. 7 Pin Configuration and Functions
  8. 8 Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Typical Characteristics
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1  Details of a Qi Wireless Power System and BQ51013B-Q1 Power Transfer Flow Diagrams
      2. 9.3.2  Dynamic Rectifier Control
      3. 9.3.3  Dynamic Efficiency Scaling
      4. 9.3.4  RILIM Calculations
      5. 9.3.5  Input Overvoltage
      6. 9.3.6  Adapter Enable Functionality and EN1/EN2 Control
      7. 9.3.7  End Power Transfer Packet (WPC Header 0x02)
      8. 9.3.8  Status Outputs
      9. 9.3.9  WPC Communication Scheme
      10. 9.3.10 Communication Modulator
      11. 9.3.11 Adaptive Communication Limit
      12. 9.3.12 Synchronous Rectification
      13. 9.3.13 Temperature Sense Resistor Network (TS)
      14. 9.3.14 3-State Driver Recommendations for the TS/CTRL Pin
      15. 9.3.15 Thermal Protection
      16. 9.3.16 WPC v1.2 Compliance – Foreign Object Detection
      17. 9.3.17 Receiver Coil Load-Line Analysis
    4. 9.4 Device Functional Modes
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Applications
      1. 10.2.1 BQ51013B-Q1 Wireless Power Receiver Used as a Power Supply
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedure
          1. 10.2.1.2.1 Using The BQ51013B-Q1 as a Wireless Power Supply: (See Figure 1-1 )
          2. 10.2.1.2.2 Series and Parallel Resonant Capacitor Selection
          3. 10.2.1.2.3 Recommended RX Coils
          4. 10.2.1.2.4 COMM, CLAMP, and BOOT Capacitors
          5. 10.2.1.2.5 Control Pins and CHG
          6. 10.2.1.2.6 Current Limit and FOD
          7. 10.2.1.2.7 RECT and OUT Capacitance
        3. 10.2.1.3 Application Curves
      2. 10.2.2 Dual Power Path: Wireless Power and DC Input
        1. 10.2.2.1 Design Requirements
        2. 10.2.2.2 Detailed Design Procedure
        3. 10.2.2.3 Application Curves
      3. 10.2.3 Wireless and Direct Charging of a Li-Ion Battery at 800 mA
        1. 10.2.3.1 Design Requirements
        2. 10.2.3.2 Detailed Design Procedure
        3. 10.2.3.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Device Support
      1. 13.1.1 Third-Party Products Disclaimer
      2. 13.1.2 Development Support
    2. 13.2 Receiving Notification of Documentation Updates
    3. 13.3 Support Resources
    4. 13.4 Trademarks
    5. 13.5 Electrostatic Discharge Caution
    6. 13.6 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information
10.2.1.2.4 COMM, CLAMP, and BOOT Capacitors

For most applications, the COMM, CLAMP, and BOOT capacitance values will be chosen to match the BQ51013BEVM-764.

The BOOT capacitors are used to allow the internal rectifier FETs to turn on and off properly. These capacitors are from AC1 to BOOT1 and from AC2 to BOOT2 and must have a minimum 25-V rating. A 10-nF capacitor with a 25-V rating is chosen.

The CLAMP capacitors are used to aid in the clamping process to protect against overvoltage. These capacitors are from AC1 to CLAMP1 and from AC2 to CLAMP2 and must have a minimum 25-V rating. A 0.47-µF capacitor with a 25-V rating is chosen.

The COMM capacitors are used to facilitate the communication from the RX to the TX. This selection can vary a bit more than the BOOT and CLAMP capacitors. In general, a 22-nF capacitor is recommended. Based on the results of testing of the communication robustness in the final solution, a change to a 47-nF capacitor may be in order. The larger the capacitor the larger the deviation will be on the coil which sends a stronger signal to the TX. This also decreases the efficiency somewhat. In this case, a 22-nF capacitor with a 25-V rating is chosen.