SLUUCX0 February   2024

 

  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 Recommended Power Requirements
    2. 2.2 I/O Description
    3. 2.3 Jumper Description
    4. 2.4 Setup for Different UCC57108 Variants
    5. 2.5 DESAT Setup
  7. 3Implementation Results
    1. 3.1 Out-The-Box Evaluation
    2. 3.2 Equipment Setup
      1. 3.2.1 Power Supply
      2. 3.2.2 Function Generator
      3. 3.2.3 Oscilloscope
      4. 3.2.4 Digital Multimeter (DMM)
    3. 3.3 Bench Setup
    4. 3.4 Procedure and Results
  8. 4Typical Performance Waveforms
    1. 4.1 DESAT Feature
    2. 4.2 Bipolar Feature of UCC57108B
  9. 5Hardware Design Files
    1. 5.1 Schematics
    2. 5.2 PCB Layouts
    3. 5.3 Bill of Materials
  10. 6Compliance Information
  11. 7Additional Information
    1. 7.1 Trademarks

2.5 DESAT Setup

The UCC57108EVM out-the-box evaluates the DESAT protection feature of the UCC57108 when the device is on. This is done with jumper J1 connecting the DESAT pin to the FET drain out-the-box. Because the EVM does not come with a FET, the DESAT input detects open voltage. This triggers the desaturation protection of the device when the user turns the device on and inputs a signal, which ultimately pulls the fault output signal low. Figure 5-1 shows this feature in practice.

If the user needs to evaluate the switching capabilities of the UCC57108 without a FET, then short the DESAT pin to ground by moving the jumper on J1 to connect the left and middle pin headers, as circled in Figure 3-2.

GUID-2FAF1F74-7C4B-4F35-A47C-CBC9C0B93278-low.pngFigure 2-2 UCC57108EVM Jumper J1 Adjustment to Ground DESAT