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

3.3 Test Setup

To test TIDA-050047 after the configuration has been programmed, a few connections need to be made before powering on.

A bidirectional power supply can be connected to the BATT socket(J2) to emulate a battery. Depending on the cell configuration jumper settings for JP1–JP3, set the voltage on the power supply accordingly. 1A is sufficient for testing, but can be modified as needed. The JP4 jumper also needs to be populated for the default thermistor settings.

Once the connections are properly made, the power supply can be turned on. The power supply on BATT, powers on the BQ25798 and the necessary 5V and 3.3V buck converter and LDO that connects to the TPS25751D. Once the PD controller is powered on, the controller loads the project configurations that are programmed on the Flash IC to operate based on the selected options in the Application Customization Tool.

The TIDA-050047 is now ready to be connected to a port partner via a USB Type-C cable to either source power or the sink power as negotiated.

Power is supplied on the BATT pin only for sink-only testing modes like dead battery simulation. The connection setup remains the same. Therefore, once the correct jumpers are set, when the USB Type-C cable connects to a port partner that offers source capabilities, the TPS25751D powers on using VBUS and loads the proper configurations from the flash to program the BQ25798 for charging the battery.