SLUAAY2 December   2024 ISO5451 , ISO5451-Q1 , ISO5452 , ISO5452-Q1 , ISO5851 , ISO5851-Q1 , ISO5852S , ISO5852S-EP , ISO5852S-Q1 , UCC21710 , UCC21710-Q1 , UCC21717-Q1 , UCC21732 , UCC21732-Q1 , UCC21736-Q1 , UCC21737-Q1 , UCC21738-Q1 , UCC21739-Q1 , UCC21750 , UCC21750-Q1 , UCC21755-Q1 , UCC21756-Q1 , UCC21759-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Introduction
  5. 2 SiC and IGBT Characteristics
  6. 3 Failure Modes
  7. 4 Short-Circuit Protection Approaches
    1. 4.1 Short-Circuit Current-Based Protection Implementation
    2. 4.2 Short Circuit Voltage-Based Protection Implementation
  8. 5 DESAT Circuitry Design
    1. 5.1 DESAT Circuit Component Selection
    2. 5.2 Effect of Parasitic Elements
    3. 5.3 Effect of Rlim on DESAT Noise
  9. 6 Safe Shutdown
    1. 6.1 Safe Shutdown Mechanisms
    2. 6.2 Safe Shutdown Considerations
  10. 7 Short-Circuit Test Setup and Data
    1. 7.1 Short-Circuit Bench Measurement Setup
    2. 7.2 SC Board Setup for Data Collection
    3. 7.3 Different Circuit Configurations for SC Testing
    4. 7.4 Bench Measurement Results
    5. 7.5 Overall Summary of SiC vs IGBT Power Module SC Observation
  11. 8 Key Consideration in Designing SC Protection Circuit
  12. 9 Summary
  13. 10References

7.2 SC Board Setup for Data Collection

The following lab setup is used to collect data for both DESAT and OC-based implementation for both IGBT and SiC power modules, as shown in Figure 7-2.

UCC21750Q1 XM3® Evaluation Board With Half Bridge Driver EVM Connected Figure 7-2 XM3® Evaluation Board With Half Bridge Driver EVM Connected

The HVP054 EVM directly plugs into the XM3® evaluation board from Wolfspeed® as shown in Figure 7-2 to exercise SC event for the SiC power module.

BM3® evaluation board was used to test for the IGBT power module SC event. As the gate driver board is not compatible with the power module evaluation board, an interface board is used to convert the EVM to be compatible with the 62mm power module connection as shown in Figure 7-3.

UCC21750Q1 Interface Board to Connect Gate Driver EVM to BM3 Power Module Figure 7-3 Interface Board to Connect Gate Driver EVM to BM3 Power Module