SLUSFJ0B June   2024  – June 2025 BQ51013C-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Description (continued)
  6. 5 Device Comparison Table
  7. 6 Pin Configuration and Functions
  8. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Details of a Qi Wireless Power System and BQ51013C-Q1 Power Transfer Flow Diagrams
      2. 8.3.2  RILIM Calculations
      3. 8.3.3  Input Overvoltage
      4. 8.3.4  Adapter Enable Functionality and EN1/EN2 Control
      5. 8.3.5  End Power Transfer Packet (WPC Header 0x02)
      6. 8.3.6  Status Outputs
      7. 8.3.7  WPC Communication Scheme
      8. 8.3.8  Communication Modulator
      9. 8.3.9  Adaptive Communication Limit
      10. 8.3.10 Synchronous Rectification
      11. 8.3.11 Temperature Sense Resistor Network (TS)
      12. 8.3.12 3-State Driver Recommendations for the TS/CTRL Pin
      13. 8.3.13 Thermal Protection
      14. 8.3.14 WPC v1.3 Compliance – Foreign Object Detection
    4. 8.4 Device Functional Modes
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 BQ51013C-Q1 Wireless Power Receiver Used as a Power Supply
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Using The BQ51013C-Q1 as a Wireless Power Supply: (See Figure 1-1 )
          2. 9.2.1.2.2 Series and Parallel Resonant Capacitor Selection
          3. 9.2.1.2.3 Recommended RX Coils
          4. 9.2.1.2.4 COMM, CLAMP, and BOOT Capacitors
          5. 9.2.1.2.5 Control Pins and CHG
          6. 9.2.1.2.6 Current Limit and FOD
          7. 9.2.1.2.7 RECT and OUT Capacitance
      2. 9.2.2 Dual Power Path: Wireless Power and DC Input
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
        3. 9.2.2.3 Application Curves
      3. 9.2.3 Wireless and Direct Charging of a Li-Ion Battery at 400 mA
        1. 9.2.3.1 Design Requirements
        2. 9.2.3.2 Detailed Design Procedure
        3. 9.2.3.3 Application Curves
  11. 10Power Supply Recommendations
  12. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  13. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
      2. 12.1.2 Development Support
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  14. 13Revision History
  15. 14Mechanical, Packaging, and Orderable Information

8.3.14 WPC v1.3 Compliance – Foreign Object Detection

The BQ51013C-Q1 is a WPC v1.3 compatible device. In order to enable a Power Transmitter to monitor the power loss across the interface as one of the possible methods to limit the temperature rise of Foreign Objects, the BQ51013C-Q1 reports its Received Power to the Power Transmitter. The Received Power equals the power that is available from the output of the Power Receiver plus any power that is lost in producing that output power (the power loss in the Secondary Coil and series resonant capacitor, the power loss in the Shielding of the Power Receiver, the power loss in the rectifier). In the WPC2.0 specification, foreign object detection (FOD) is enforced. This means the BQ51013C-Q1 will send received power information with known accuracy to the transmitter.

WPC v1.3 defines Received Power as “the average amount of power that the Power Receiver receives through its Interface Surface, in the time window indicated in the Configuration Packet”.

To receive certification as a WPC v1.3 receiver, the Device Under Test (DUT) is tested on a Reference Transmitter whose transmitted power is calibrated, the receiver must send a received power such that:

Equation 4. 0 > (TX PWR)REF – (RX PWR out)DUT > –375 mW

This 375-mW bias ensures that system will remain interoperable.

WPC v1.3 Transmitter is tested to see if it can detect reference Foreign Objects with a Reference receiver.

WPC v1.3 Specification will allow much more accurate sensing of Foreign Objects.