SLVUCP4 November   2023

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 Power Requirements
    2. 2.2 Header Information
    3. 2.3 Jumper Information
    4. 2.4 Push Buttons
    5. 2.5 Debug Information
    6. 2.6 Test Points
    7. 2.7 Configuring the TPS25730EVM
      1. 2.7.1 Minimum Voltage Configuration
      2. 2.7.2 Maximum Voltage Configuration
      3. 2.7.3 Sink Current Configuration
      4. 2.7.4 Complete Example
  8. 3Hardware Design Files
    1. 3.1 Schematics
    2. 3.2 PCB Layouts
    3. 3.3 Bill of Materials (BOM)
  9. 4Additional Information
    1. 4.1 Trademarks

1.3 Specification

This section describes applications for the TPS25730.

The TPS25730 is a PD controller that enables the sinking of power to the system through a USB-C connector using the USB-PD specification, as shown in Figure 2-1. Due to the ability to configure power settings by voltage dividers at the ADCINx pins, no EEPROM is needed, which reduces BOM cost and saves board space. Additionally, no software or GUI is required, minimizing development time.

With the ADCINx pins configured the desired settings, as described in Section 2.7, the TPS25730 sinks the negotiated amount of power through the PPHV pin from a USB-PD capable source.

How this negotiation occurs is detailed in the Universal Serial Bus Power Delivery Specification. This specification can be accessed at USB Power Delivery.

In broad terms:

  1. The USB-C cable that is connected to a source is plugged into the USB-C port of the TPS25730EVM.
  2. A 5 V implicit Type-C contract is established.
  3. The source sends the capabilities as an ordered list to the sink, through the CC line.
  4. The sink makes a request for a specific Power Data Object (PDO) from the list.
  5. The source accepts this request and sends a PS_Ready message to indicate that the bus is ready to deliver power.
  6. Power is delivered from the source through the VBUS line of the USB cable, through the TPS25730 power path, and to the load through PPHV.
GUID-20231109-SS0I-06HP-DJTD-DRMGD02PRPPS-low.svg Figure 1-1 TPS25730EVM Block Diagram