SLUUCZ9C January   2024  – December 2024

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Device Information
      1. 1.3.1 U1 Component Selection
      2. 1.3.2 UCC33420-Q1 Pin Definition
    4. 1.4 Specification
  7. 2Hardware
    1. 2.1 EVM Setup and Operation
      1. 2.1.1 Recommended Test Equipment
      2. 2.1.2 External Connections for Easy Evaluation
      3. 2.1.3 Powering the EVM
      4. 2.1.4 EVM Test Points
      5. 2.1.5 Oscilloscope Probes: Probing the EVM
  8. 3Implementation Results
    1. 3.1 Schematic
    2. 3.2 Performance Data
      1. 3.2.1 Efficiency Data
      2. 3.2.2 Regulation Data
      3. 3.2.3 Startup Waveforms
      4. 3.2.4 Inrush Current
      5. 3.2.5 AC Ripple Voltage
      6. 3.2.6 Load Transient
      7. 3.2.7 VCC Short-Circuit
      8. 3.2.8 Thermal Performance
  9. 4Hardware Design Files
    1. 4.1 Assembly and Printed Circuit Board (PCB)
    2. 4.2 Bill of Materials (BOM)
  10. 5Additional Information
    1. 5.1 Trademarks
  11. 6Revision History

3.2.3 Startup Waveforms

UCC33420Q1-EVM UCC33420-Q1 Start-up, sequence EN=5.0V → VINP=5.0V, VCC=5.0V, Iout=0mA Figure 3-6 UCC33420-Q1 Start-up, sequence EN=5.0V → VINP=5.0V, VCC=5.0V, Iout=0mA
UCC33420Q1-EVM UCC33020-Q1 Start-up, sequence EN=5.0V → VINP=3.3V, VCC=5.0V, Iout=0mA Figure 3-7 UCC33020-Q1 Start-up, sequence EN=5.0V → VINP=3.3V, VCC=5.0V, Iout=0mA
UCC33420Q1-EVM UCC33420-Q1 Start-up, sequence EN=5.0V → VINP=5.0V, VCC=5.0V, Rload=18Ω Figure 3-8 UCC33420-Q1 Start-up, sequence EN=5.0V → VINP=5.0V, VCC=5.0V, Rload=18Ω
UCC33420Q1-EVM UCC33020-Q1 Start-up, sequence EN=5.0V → VINP=3.3V, VCC=5.0V, Rload=50Ω Figure 3-9 UCC33020-Q1 Start-up, sequence EN=5.0V → VINP=3.3V, VCC=5.0V, Rload=50Ω