SLUUBD5D September   2019  – February 2022 UCC12040 , UCC12050 , UCC12051-Q1

 

  1.   Trademarks
  2. 1Introduction
  3. 2Description
  4. 3Typical Application Circuit and Top Component View
  5. 4Pin Configuration and Pin Functions
    1. 4.1 Pin Functions
  6. 5EVM Setup and Operation
    1. 5.1 U1 Component Selection
    2. 5.2 External Connections for Easy Evaluation
    3. 5.3 High Voltage Isolation
    4. 5.4 Enabling and Disabling the UCC12050
    5. 5.5 SYNC and SYNC_OK Functionality
    6. 5.6 Output Voltage Selection
    7. 5.7 Test Points: TP1, TP2 & TP3
    8. 5.8 Board Level EMI Mitigation Techniques
  7. 6List of Materials
  8. 7Schematic
  9. 8Layout Diagrams
  10. 9Revision History

5.7 Test Points: TP1, TP2 & TP3

Test points for VINP, VISO, and SYNC are provided on the EVM.

To get the cleanest measurement of output ripple using an oscilloscope, use probe tip with a ground spring.

This reduces the added noise that is introduced when using the longer alligator clip style ground lead. Figure 5-1 shows a picture illustrating how these test points are best used.

Comparison scope shots between the two grounding methods are shown in Figure 5-2.

GUID-B8C1D50E-1420-4317-8EB8-869869308188-low.jpgFigure 5-1 Using the Pig Tail Test Points: TP1, TP2, TP3
GUID-16932BD5-4F4F-43B7-B3D7-09830E93AF5F-low.png Figure 5-2 Comparison Between Voltage Measured by a Alligator Clip (Left) Versus Ground Spring (Right)