SPRUJE8 December   2024 AM2754-Q1

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Preface Read This First
      1. 1.2.1 Important Usage Notes
    3. 1.3 Kit Contents
    4. 1.4 Device Information
      1. 1.4.1 Security
    5. 1.5 Audio Expansion Connectors
  6. 2Hardware
    1. 2.1  Component Identification
    2. 2.2  Power Requirements
      1. 2.2.1 Power Input Using USB Type-C Connector
      2. 2.2.2 Power Status LEDs
      3. 2.2.3 Power Tree
      4. 2.2.4 Power Sequence
      5. 2.2.5 PMIC
    3. 2.3  Reset
    4. 2.4  Clock
    5. 2.5  Boot Mode Selection
    6. 2.6  Header Information
    7. 2.7  Push Buttons
    8. 2.8  Switches
    9. 2.9  Interfaces
      1. 2.9.1 Ethernet Interface
        1. 2.9.1.1 Ethernet Add-on Connectors
      2. 2.9.2 Audio Interfaces
        1. 2.9.2.1 Audio Clocking
        2. 2.9.2.2 McASP
        3. 2.9.2.3 MLB
    10. 2.10 AEC Mapping
      1. 2.10.1 Audio Expansion Connector 1
      2. 2.10.2 Audio Expansion Connector 2
    11. 2.11 Test Points
  7. 3Hardware Design Files
  8. 4Additional Information
    1. 4.1 If You need Assistance
    2. 4.2 Trademarks
  9. 5References
    1. 5.1 Reference Documents
    2. 5.2 Other TI Components Used This Design
  10. 6Revision History

2.2.1 Power Input Using USB Type-C Connector

The AM275x is powered through either of the two USB Type-C connections. The USB Type-C source is capable of providing power delivery of more than 15W (3A at 5V). On this EVM, the channel configuration pins, CC1 and CC2, from either of the two the USB Type-C connector are interfaced to the Type C DUAL Power Delivery (PD) Controller (TPS65988DHRSHR). The PD controller monitors the USBC_CONNx_CC1 and USBC_CONNx_CC2 pins of either of both USB-C connectors to detect port attach/detach, attached device type (source, sink, or dual role power), cable orientation, and cable capacity. When a power source device is connected, the PD controller detects the device and identifies its role (source, sink, or dual role power). The PD controller then uses the PD protocol over the USBC_CONNx_CC1 and USBC_CONNx_CC2 pins to negotiate power requirements with the power source.

The minimum power requirement of the AM275x EVM is 15W (5V at 3A). When the power negotiation is unsuccessful and the source is not capable of providing the required power, then the output at the OR gate remains low which means the VMAIN Load switch (TPS22810DRVT) is disabled. Therefore, if the power requirement is not met, all power supplies remains in the off state. The board gets powered on completely only when the source can provide a minimum of 15W (5V at 3A).

The AM275x EVM includes a power supply based on a Burton (TPS6522430) Power Management Integrated Chip (PMIC) for each of the power rails. During the initial stage of the power supply, A minimum 5V supplied by the Type-C USB connector is used to generate all of the necessary voltages required by the PMIC and subsequently the rest of the board via the PMIC LDO outputs. For more information about the PMIC, refer to Section 2.2.5.