SLUUCK0A September   2023  – June 2026 ISO5451 , ISO5451-Q1 , ISO5452 , ISO5452-Q1 , ISO5851 , ISO5851-Q1 , ISO5852S , ISO5852S-EP , ISO5852S-Q1 , UCC21710 , UCC21710-Q1 , UCC21732 , UCC21732-Q1 , UCC21736-Q1 , UCC21739-Q1 , UCC21750 , UCC21750-Q1 , UCC21759-Q1

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specifications
    4. 1.4 General TI High Voltage Evaluation User Safety Guidelines
  6. 2Hardware
    1. 2.1 Module and Gate Driver Compatibility
      1. 2.1.1 Supported Wolfspeed Modules and Evaluation Platforms
      2. 2.1.2 Supported Gate Drivers
    2. 2.2 System Overview and Functions
      1. 2.2.1 PCB Pinout
      2. 2.2.2 Block Diagram
        1. 2.2.2.1 Primary-Side Power
        2. 2.2.2.2 Primary-Side I/O and Diagnostics
        3. 2.2.2.3 Secondary-Side Bias Supply
        4. 2.2.2.4 Output Stage Gate Loop
        5. 2.2.2.5 Current Booster
        6. 2.2.2.6 Short-Circuit Detection System
          1. 2.2.2.6.1 Short-Circuit Detection - DESAT
          2. 2.2.2.6.2 Short-Circuit Detection - OC
        7. 2.2.2.7 Temperature-Sense System
    3. 2.3 Test Setups and Procedures
      1. 2.3.1 Equipment List
      2. 2.3.2 Power-On and Bias Supply Check
      3. 2.3.3 Output Switching
      4. 2.3.4 AIN-APWM Test
  7. 3Implementation Results
    1. 3.1 EVM Example Measurements
      1. 3.1.1 Short-Circuit Testing
        1. 3.1.1.1 OC Variant: Normal Switching vs Short Circuit Soft Turn-Off
        2. 3.1.1.2 DESAT Variant: Normal Switching vs Short Circuit Soft Turn-Off
      2. 3.1.2 Analog Sensing
    2. 3.2 EVM Tuning
      1. 3.2.1 Adjust Power Supplies
        1. 3.2.1.1 Adjust VDD Bias Supply
        2. 3.2.1.2 Adjust VEE Bias Supply
        3. 3.2.1.3 Switch to Unipolar Bias Supply
        4. 3.2.1.4 Bypass VDD LDO
      2. 3.2.2 Adjust Drive Strength
        1. 3.2.2.1 Without Booster
        2. 3.2.2.2 Enabling/Disabling Booster Stage
      3. 3.2.3 Adaptations for Other ISO5x5x / UCC217xx Variants
        1. 3.2.3.1 Adapting EVM for UCC21732/39
        2. 3.2.3.2 Adapting EVM for UCC21737
        3. 3.2.3.3 Adapting EVM for ISO5451/ISO5851
  8. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  9. 5Additional Information
    1. 5.1 Trademarks
  10. 6Revision History

3.2.2.2 Enabling/Disabling Booster Stage

If a higher drive strength is required, populate an on-board booster stage. To populate the booster stage, remove R47 and R51, populate Q1 with PHPT60410NYX, and populate Q2 with PHPT60410PYX for the low-side gate driver. Remove R81 and R85, populate Q4 with PHPT60410NYX, and populate Q5 with PHPT60410PYX for the high-side driver. Other BJTs with the same package are also useable.

The booster stage can impede the soft turn-off feature. To realize soft turn-off after enabling the booster stage, a damper circuit, the R56/C46 combination for low-side driver and the R89/C61 combination for high-side driver, can be used. Without the damper circuit, the OUTL pin tries to sink the soft turn-off current from the base of the booster stage. The booster stage amplifies this current and result in a larger turn-off current for the IGBT/SiC MOSFET and a higher Vds overshoot. The capacitor in the damper circuit can help mediate this issue by supplying current to the OUTL pin during a soft turn-off event, thus resulting in lower current being pulled from the base of the booster stage and lower turn-off current for the SiC MOSFET/IGBT.