SLVSE24C November   2017  – August 2019 TPS25820 , TPS25821

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Schematic
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 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 Switching Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
      1. 7.1.1 USB Type C Basic
      2. 7.1.2 Configuration Channel
      3. 7.1.3 Detecting a Connection
    2. 7.2 Functional Block Diagrams
    3. 7.3 Feature Description
      1. 7.3.1 Configuration Channel Pins CC1 and CC2
      2. 7.3.2 Current Capability Advertisement and VBUS Overload Protection
      3. 7.3.3 FAULT Response
      4. 7.3.4 Thermal Shutdown
      5. 7.3.5 REF
      6. 7.3.6 Plug Polarity Detection
      7. 7.3.7 Sink Attachment Indicator
      8. 7.3.8 Device Enable Control
      9. 7.3.9 Undervoltage Lockout (UVLO)
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Type-C Source Port Implementation without BC 1.2 Support
        1. 8.2.1.1 Design Requirements
          1. 8.2.1.1.1 Input and Output Capacitance Considerations
          2. 8.2.1.1.2 System Level ESD Protection
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Type -C Source Port Implementation with BC 1.2 (DCP Mode) Support
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        3. 8.2.2.3 Application Curves
      3. 8.2.3 Implementing a USB 3.1 Type-C Charging Port with the TPS25820
        1. 8.2.3.1 Design Requirements
        2. 8.2.3.2 Detailed Design Procedure
        3. 8.2.3.3 Application Curves
      4. 8.2.4 Implementing TPS25821 in USB Car Chargers
        1. 8.2.4.1 Design Requirements
        2. 8.2.4.2 Detailed Design Procedure
        3. 8.2.4.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  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 Related Links
    4. 11.4 Receiving Notification of Documentation Updates
    5. 11.5 Community Resources
    6. 11.6 Trademarks
    7. 11.7 Electrostatic Discharge Caution
    8. 11.8 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

7.1.3 Detecting a Connection

Sources and DRPs fulfill the role of detecting a valid connection over USB Type-C. Figure 9 shows a Source to Sink connection made with Type-C cable. As shown in Figure 9, the detection concept is based on being able to detect terminations in the product which has been attached. A pull-up and pull-down termination model is used. A pull-up termination can be replaced by a current source.

  • In the Source-Sink connection the Source monitors both CC pins for a voltage lower than the unterminated voltage.
  • A Sink advertises Rd on both its CC pins (CC1 and CC2).
  • A powered cable advertises Ra on its VCONN pin.

TPS25820 TPS25821 detect_conn_slvse24.gifFigure 9. Source-Sink Connection Mechanism