TIDT263 March   2022

 

  1.   Description
  2.   Features
  3.   Applications
  4. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Considerations
  5. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Load Regulation
    4. 2.4 Thermal Images
    5. 2.5 Bode Plot
  6. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Voltage Ripple
    3. 3.3 Load Transients
    4. 3.4 Short-Circuit Protection
    5. 3.5 Start-Up Sequence

Description

This reference design implements a Power over Ethernet (PoE) Power Device (PD) flyback converter with a 12-V, 2.1-A output. A TPS23731 PD, PWM controller provides all the necessary functions to implement the PoE PD control and the PWM control for the flyback converter. The TPS23731 device uses primary side regulation (PSR), eliminating the need for optocoupler feedback.