SLUUD44 June   2025 UCC57142

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  6. 2Hardware
    1. 2.1 Additional Images
    2. 2.2 Power Requirements
    3. 2.3 Setup for Different UCC57142 Variants
    4. 2.4 I/O Description
    5. 2.5 Jumper Information
    6. 2.6 DBV Package Compatibility
      1. 2.6.1 UCC27511 Modification
      2. 2.6.2 UCC27517 and UC27533 Modification
        1. 2.6.2.1 UCC27518, UCC27519, UCC27536, and UCC27537 Modification
      3. 2.6.3 UCC27531 and UCC27532 Modification
      4. 2.6.4 UCC44273 Modification
  7. 3Implementation Results
    1. 3.1 Equipment Setup
      1. 3.1.1 Power Supply
      2. 3.1.2 Function Generator
      3. 3.1.3 Oscilloscope
      4. 3.1.4 Digital Multimeter (DMM)
    2. 3.2 Bench Setup
    3. 3.3 Procedure and Results
    4. 3.4 Typical Performance Waveforms
      1. 3.4.1 Normal Operation
      2. 3.4.2 Overcurrent Protection Feature
  8. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  9. 5Compliance Information
  10. 6Additional Information
    1. 6.1 Trademarks

3.3 Procedure and Results

  1. Before powering up the test procedure, ensure that the connections are correct as shown as in section 6.
  2. Turn on PSU #1 and check the current on DMM #1. If the current shown is less than 1.25mA, then the initial setup is correct.
  3. Turn on function generator output and examine for the following conditions:
    1. The current on DMM #1 with the function generator ON should be 2.5mA±1.0mA.
    2. Check the FLTb and OUT signals. FLTb should be high and OUT should be stable. Refer to Figure 3-2 for details.
    3. Turn on PSU #2, and check the FLTb and OUT signals. Both signals should be low. Refer to Figure 3-3 for details. If the signals are not low, then please recheck PSU #2 connections.
    4. Turn off PSU #2 and recheck the FLTb and OUT signals. FLTb should be high and OUT should be stable. Refer to Figure 3-2 for details.
  4. Once testing is satisfied, power down the EVM by following the order:
    1. Disable function generator.
    2. Disable Power supply #2.
    3. Disable Power supply #1.
    4. Disconnect cables and probes.
UCC57142EVM Reference Waveforms For When PSU #2 is Off Figure 3-2 Reference Waveforms For When PSU #2 is Off
UCC57142EVM Reference Waveforms For When PSU #2 is On Figure 3-3 Reference Waveforms For When PSU #2 is On