SLVUCP8A September   2024  – June 2025 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 Power Requirements
    2. 2.2 Setup
      1. 2.2.1 Flashing Firmware Configuration to the TPS26750EVM
      2. 2.2.2 Stand Alone Testing
      3. 2.2.3 Dead Battery Safe Mode
      4. 2.2.4 Dead Battery Always Enable Sink
      5. 2.2.5 TPS26750 and BQ25756
    3. 2.3 Header Information
    4. 2.4 Jumper Information
    5. 2.5 Push Buttons
    6. 2.6 Interfaces
    7. 2.7 Debug Information
    8. 2.8 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 Use With the BQ25756EVM
      1. 4.1.1 Hardware Setup with BQ25756EVM
      2. 4.1.2 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
  13. 7Revision History

2.2.3 Dead Battery Safe Mode

TPS26750EVM Dead Battery Safe ModeFigure 2-4 Dead Battery Safe Mode

The portions of the EVM highlighted in red, are powered upon TPS26750 boot up when testing the device in Dead Battery Safe Mode, as shown in Figure 2-4. This mode occurs when the VIN_3V3 pin of the TPS26750 is unpowered and a USB-PD capable source is connected to the DUT Type C (J4) connector, when jumper J15 is populated. During Dead Battery Safe Mode, the Bidirectional Power Switch (U10) remains open during the period of time that the TPS26750 boots and loads the configuration. In this mode, the TPS26750 can only operate as a sink and can sink between 5V and 48V (both SPR and EPR capable). After the configuration is loaded and the device is finished booting, the Bidirectional Power Switch closes (or remains open) based upon the configuration loaded and the capabilities of the attached source.

To successfully test the USB-PD Extended Power Range (EPR) with the TPS26750EVM and successfully negotiate an EPR contract (a USB-PD contract with a voltage greater than 20V), a USB-IF compliant 240W rated USB-C to USB-C cable must be used.

The example setup in Figure 2-5 shows a 140W 3 Port PD3.1 Supported Wall Adapter, whose USB-C1 port is capable of providing 140W (28V at 5A) of power, connected to a USB-C to USB-C 240W capable cable, which is in turn connected to the Power Type C port (J3) of the TPS26750EVM. This example setup is capable of sinking 28V of power (as the wall adapter can provide at maximum 28V; the TPS26750EVM is not limited to 28V) to the DUT Type C port (J4), which is in the USB-PD Extended Power Range.


TPS26750EVM Dead Battery Safe Mode Example Hardware Setup

Figure 2-5 Dead Battery Safe Mode Example Hardware Setup
Note:

This figure depicts a previous version of the TPS26750 EVM (RevA2), but the information remains accurate and applicable to the current version.