SLVUCP8 September   2024 TPS26750

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Additional Images
    2. 2.2 Power Requirements
    3. 2.3 Setup
    4. 2.4 Header Information
    5. 2.5 Jumper Information
    6. 2.6 Push Buttons
    7. 2.7 Interfaces
    8. 2.8 Debug Information
    9. 2.9 Test Points and LEDS
  9. 3Software
    1. 3.1 Software Description
    2. 3.2 Software Installation
      1. 3.2.1 Web Browser
      2. 3.2.2 Native Application
    3. 3.3 Software Development
    4. 3.4 Using the Application Customization Tool
      1. 3.4.1 Default View
      2. 3.4.2 Selecting a Configuration
      3. 3.4.3 Filling Out the Questionnaire
      4. 3.4.4 Advanced Configuration Mode
      5. 3.4.5 Flashing Configuration to TPS26750
      6. 3.4.6 Additional Settings
        1. 3.4.6.1 Generating a New Configuration
        2. 3.4.6.2 Exporting and Importing Settings
        3. 3.4.6.3 Generating the Binary
        4. 3.4.6.4 Generating the VIF File
  10. 4Application Specific Use Cases
    1. 4.1 Liquid Detection and Corrosion Mitigation Overview
      1. 4.1.1 Liquid Detection and Corrosion Mitigation Hardware Setup
      2. 4.1.2 Liquid Detection and Corrosion Mitigation Software Setup
      3. 4.1.3 Liquid Detection Detailed Implementation
        1. 4.1.3.1 Liquid Detection Config Register (0x98)
    2. 4.2 Use With the BQ25756EVM
      1. 4.2.1 Hardware Setup with BQ25756EVM
      2. 4.2.2 Software Setup with the BQ25756EVM
  11. 5Hardware Design Files
    1. 5.1 Schematics
    2. 5.2 PCB Layouts
    3. 5.3 Bill of Materials (BOM)
  12. 6Additional Information
    1. 6.1 Trademarks
    2. 6.2 Electrostatic Discharge Caution
    3. 6.3 Terminology
    4. 6.4 Device Support
      1. 6.4.1 Third-Party Products Disclaimer
      2. 6.4.2 Supplemental Content
    5. 6.5 Documentation Support
    6. 6.6 Receiving Notification of Documentation Updates
    7. 6.7 Support Resources

4.1.1 Liquid Detection and Corrosion Mitigation Hardware Setup

Out of the box, the hardware on the TPS26750EVM is set up for Liquid Detection and Corrosion Mitigation. R27 and R28 are populated to connect J4 Type-C SBU pins to TPS26750 GPIO4 and GPIO5 for liquid detection. R77 and R78, used for BC1.2, are not populated. TPD4S480 (U12) is in between the TPS26750 and the J4 Type-C port for short protection.

Resistors R27 and R28 are located to the left of U2, located in the EPR Implementation box. Pads for resistors R77 and R78 are located to the left of J4, in the EPR Implementation box. For location details, refer to Figure 4-2.

TPS26750EVM Liquid Detection Resistor Location Figure 4-2 Liquid Detection Resistor Location
Note: Liquid Detection or Corrosion Mitigation and BC1.2 cannot be configured in the same system. Make sure R77, R78 and R27, R28 are not both populated at the same time.

On the TPS26750EVM, the hardware is set to use specific GPIOs for MOSFET control and Liquid Detection feature. For user applications, some GPIOs can be configured differently while some are required for all designs. For details on specific test point and the configurability for custom designs, refer to Table 4-1. To setup liquid detection evaluation on the TPS26750EVM, refer to Section 4.1.2.

Table 4-1 Liquid Detection Test Points
Test Point on EVM Description Configurability
GPIO4 Connected to SBU1 for Liquid Detection 1 (LD1) Not configurable for custom designs
GPIO5 Connected to SBU2 for Liquid Detection 2 (LD2) Not configurable for custom designs
SBU1 Connected to GPIO4 for Liquid Detection 1 (LD1) Not configurable for custom designs
SBU2 Connected to GPIO5 for Liquid Detection 2 (LD2) Not configurable for custom designs
GPIO6 Connected to PFET (QP1 and QP2) to enable pull-up, when enabled PD is detecting short to GND Configurable for custom designs
GPIO7 Connected to NFET (QN1 and QN2) to enable pull-down, when enabled PD is detecting short to VBUS/CC Configurable for custom designs
GPIO1 When Liquid Detect support is turned on in the questionnaire, this GPIO is the default output for the liquid_detected GPIO event. See TPS26750 Technical Reference Manual for details. Configurable for custom designs