TIDT291 June   2022

 

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

Description

This reference design uses the LM51551 as a secondary side regulated (SSR) flyback controller. It converts an input of 8–28.8 V to 24 V at a max power of 28.8 W. The supply starts up at a minimum input of 15.5 V and can operate down to 8-V input. The design also includes the synchronous buck converter, LMR33620, to step down 24 V to 5 V. This design features the option to evaluate either the TPS26631 eFuse or LM74700 ideal diode controller as input protection devices.