SWRU550A February   2019  – May 2019

 

  1.   MMWAVEPOEEVM Power Over Ethernet Solution
    1.     Trademarks
    2. 1 Key Features
    3. 2 Kit Contents
    4. 3 Applications
    5. 4 System Overview
      1. 4.1 Block Diagram
      2. 4.2 MSP432E401Y
      3. 4.3 TPS23753A
      4. 4.4 TPD2E2U06
      5. 4.5 TLV431A
      6. 4.6 TPS737
    6. 5 Hardware
      1. 5.1 Hardware Overview
        1. 5.1.1 Test Points, Connectors, Jumpers, Switches, and LEDs
        2. 5.1.2 Power-Up
        3. 5.1.3 Downloading the Binary
        4. 5.1.4 Connecting the MMWAVEICBOOST
      2. 5.2 Testing and Results
    7. 6 Design Files and Software Tools
      1. 6.1 Software, Development Tools, and Example Codes
      2. 6.2 Schematics
      3. 6.3 Bill of Materials
      4. 6.4 PCB Layout Recommendations
      5. 6.5 REACH Compliance
  2.   Revision History

4.3 TPS23753A

The TPS23753A is a combined PoE powered device (PD) interface and current-mode DC-DC controller optimized specifically for isolated converter designs. The PoE implementation supports the IEEE 802.3at standard as a 13-W, type 1 PD. The requirements for an IEEE 802.3at type 1 device are a superset of IEEE 802.3-2008 (originally IEEE 802.3af).

The TPS23753A supports a number of input-voltage ORing options including highest voltage, external adapter preference, and PoE preference.

The PoE interface features an external detection signature pin that can also be used to disable the internal hotswap MOSFET. This allows the PoE function to be turned off. Classification can be programmed to any of the defined types with a single resistor.

The DC-DC controller features a bootstrap start-up mechanism with an internal, switched current source. This provides the advantages of cycling overload fault protection without the constant power loss of a pullup resistor.

The programmable oscillator may be synchronized to a higher-frequency external timing reference. The TPS23753A features improvements for uninterrupted device operation through an ESD event.