SLVUC36 April   2021 TPS23882B

 

  1.   Trademarks
  2. 1Description
    1. 1.1 Features
    2. 1.2 Applications
  3. 2Quick Start
    1. 2.1 Input Power
      1. 2.1.1 Input Power (Labeled VPWR)
      2. 2.1.2 Local 3.3 V (Labeled 3.3 V)
      3. 2.1.3 External 3.3 V (Labeled 3.3 V_USB)
    2. 2.2 PoE Port Interfaces
      1. 2.2.1 IEEE802.3bt 2-Pair Ports
    3. 2.3 I2C Interfaces
      1. 2.3.1 USB2ANY
      2. 2.3.2 MSP-EXP430FR5969
    4. 2.4 Basic Test Setup Using Autonomous Mode
    5. 2.5 Basic Test Setup Using USB2ANY for I2C Interface (Auto Mode or Semi-Auto Mode Operation with I2C Monitoring)
    6. 2.6 Advanced Test Setup Using MSP-EX430FR5969 LaunchPad
  4. 3General Use Features
    1. 3.1 EVM Input/Output Connectors and Switches
    2. 3.2 EVM LEDs
    3. 3.3 EVM Test Points
    4. 3.4 EVM Test Jumpers
  5. 4TPS23882B1 GUI Setup
    1. 4.1 TPS23882B1 GUI Installation
    2. 4.2 TPS23882B1GUI Operation
    3. 4.3 MSP-EXP430FR5969 Details
      1. 4.3.1 Basic CCS and Terminal Setup
    4. 4.4 MSP430 Reference Code
      1. 4.4.1 Overview
      2. 4.4.2 Auto Mode
      3. 4.4.3 Semi Auto Mode
  6. 5EVM Schematic, Layout Guidelines, PCB Assembly and Layer Plots
    1. 5.1 Schematic
    2. 5.2 Layout Guidelines
      1. 5.2.1 Supply Voltage Decoupling
      2. 5.2.2 Port Current Kelvin Sensing
      3. 5.2.3 Ground Plane Spacing and Isolation (GND, GND1, and EARTH nets)
    3. 5.3 PCB Drawings
  7. 6Bill of Materials

2.1.2 Local 3.3 V (Labeled 3.3 V)

Local 3.3 V for local devices (labeled as 3.3 V) is provided by the onboard LM5019 buck converter. The LM5019 provides a basic power-on sequence and provides a well-controlled and consistent start-up. In addition to 54 V, the TPS23882B1 requires 3.3 V for the digital circuitry and this is routed up to TPS23882B1EVM-008 over the connector interface. The current consumption is 6-mA typical and 12-mA maximum.