TIDT336 may   2023

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Considerations
    4. 1.4 Dimensions
    5. 1.5 Test Setup
  6. 2Testing and Results
    1. 2.1 Efficiency Graph
    2. 2.2 Efficiency Data
    3. 2.3 Static Output Voltage Variation vs Load Current and VIN
      1. 2.3.1 24-V Output Voltage
      2. 2.3.2 3.3-V Output Voltage
      3. 2.3.3 U2 Input Voltage
  7. 3Waveforms
    1. 3.1 Switching Waveforms on Pin 1 of U1 (SW), Anodes of D1 and D4, at Full Load
      1. 3.1.1 18-V Input Voltage
      2. 3.1.2 24-V Input Voltage
      3. 3.1.3 32-V Input Voltage
    2. 3.2 Output Voltage Ripple
    3. 3.3 Load Transients
    4. 3.4 Start-Up Sequence
      1. 3.4.1 No Load
      2. 3.4.2 Full Load
    5. 3.5 Shutdown Sequence

Description

This 26.54 mm × 11.68 mm × 5.6-mm height board is optimized to leverage the performance of the LM5181 PSR Flyback converter. The board operates over an input voltage range of 18 V to 32 V to deliver a 24-V and 3.3-V outputs at currents up to 40 mA and 15 mA, respectively. Operating without an auxiliary winding or optocoupler, the LM5181 provides very tight output voltage regulation. The LM5181 offers several protection features, like undervoltage lockout to provide proper operation during voltage-sag conditions, programmable soft-start to reduce inrush current, hiccup-mode overcurrent protection, and thermal shutdown.