TIDUEY1C November   2020  – June 2025 BQ25798

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 TPS25751D
      2. 2.3.2 BQ25798
    4. 2.4 System Design Theory
      1. 2.4.1 TPS25751D PD Controller
      2. 2.4.2 BQ25798 Battery Charger
      3. 2.4.3 TPS54531 Buck Converter
      4. 2.4.4 TLV75533 LDO
      5. 2.4.5 USB Type-C® Receptacle
      6. 2.4.6 Supporting Components for Programming
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware and Software Requirements
    2. 3.2 Application Customization Tool
    3. 3.3 Test Setup
    4. 3.4 Test Results
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
      3. 4.1.3 Altium Project
    2. 4.2 Software
    3. 4.3 Documentation Support
    4. 4.4 Support Resources
    5. 4.5 Trademarks
  11. 5About the Author
  12. 6Revision History

2.4.1 TPS25751D PD Controller

The TPS25751D features two I2C ports: one as a controller port that connects directly to the battery charger. The latter communicates proper configurations for charging mode, charging current, OTG mode, and so forth. The controller port also connects to the I2C EEPROM that contains a patch and configuration bundle which the TPS25751 loads from on boot. The controller port can be used with header J7 to communicate to the BQ25798. The second I2C port, or the target port, can be used to directly program the TPS25751, and program the BQ25798 through the host microcontroller (MCU), or program both, and is available on J3.


TIDA-050047 TPS25751D Schematic

Figure 2-4 TPS25751D Schematic