SLUA963B June   2020  – October 2022 UCC21710-Q1 , UCC21732-Q1 , UCC5870-Q1

 

  1.   HEV/EV Traction Inverter Design Guide Using Isolated IGBT and SiC Gate Drivers
  2. 1Introduction
  3. 2HEV/EV Overview
    1. 2.1 HEV/EV Architectures
    2. 2.2 HEV/EV Traction Inverter System Architecture
    3. 2.3 HEV/EV Traction Inverter System Performance Impact
  4. 3Design of HEV/EV Traction Inverter Drive Stage
    1. 3.1  Introduction to UCC217xx-Q1
    2. 3.2  Designing a Traction Inverter Drive System Using UCC217xx-Q1
    3. 3.3  Description of Protection Features
    4. 3.4  Protection Features of UCC217xx-Q1
    5. 3.5  UCC217xx-Q1 Protection and Monitoring Features Descriptions
      1. 3.5.1 Primary and Secondary Side UVLO and OVLO
      2. 3.5.2 Over-Current (OC) and Desaturation (DESAT) Detection
      3. 3.5.3 2-Level and Soft Turn-Off
      4. 3.5.4 Power Switch Gate Voltage (VGE/VGS) Monitoring
      5. 3.5.5 Power Switch Anti-Shoot-Through
      6. 3.5.6 Integrated Internal or External Miller Clamp
      7. 3.5.7 Isolated Analog-to-PWM Channel
      8. 3.5.8 Short-Circuit Clamping
      9. 3.5.9 Active Pulldown
    6. 3.6  Introduction to UCC5870-Q1
    7. 3.7  Designing a Traction Inverter Drive System Using UCC5870-Q1
    8. 3.8  Description of Protection Features
    9. 3.9  Protection Features of UCC5870-Q1
    10. 3.10 UCC5870-Q1 Protection and Monitoring Features Descriptions
      1. 3.10.1  Primary and Secondary Side UVLO and OVLO
      2. 3.10.2  Programmable Desaturation (DESAT) Detection and Over-Current (OC)
      3. 3.10.3  Adjustable 2-Level or Soft Turn-Off
      4. 3.10.4  Active High-Voltage Clamp
      5. 3.10.5  Power Switch Gate Voltage (VGE/VGS) Monitoring
      6. 3.10.6  Gate Threshold Voltage Monitor
      7. 3.10.7  Power Switch Anti-Shoot-Through
      8. 3.10.8  Active Short Circuit (ASC)
      9. 3.10.9  Integrated Internal or External Miller Clamp
      10. 3.10.10 Isolated Analog-to-Digital Converter
        1. 3.10.10.1 Temperature Monitoring of Power Transistor
      11. 3.10.11 Short-Circuit Clamping
      12. 3.10.12 Active and Passive Pulldown
      13. 3.10.13 Thermal Shutdown and Temperature Warning of Driver IC
      14. 3.10.14 Clock Monitor and CRC
      15. 3.10.15 SPI and Register Data Protection
  5. 4Isolated Bias Supply Architecture
  6. 5Summary
  7. 6References
  8. 7Revision History

3.7 Designing a Traction Inverter Drive System Using UCC5870-Q1

The UCC5870-Q1 block diagram in the traction inverter system is shown in Figure 3-15. The legend specifies the Self-Test, Diagnostics, Protection and Driver Function blocks. In comparison to the UCC217xx-Q1 family of drivers, UCC5870-Q1 integrates many more diagnostic features such that external blocks are not longer required. Although this is beneficial to the system size and BOM reduction, it also results in the need for additional self-monitoring functions to ensure proper behavior. Thus, UCC5870-Q1 also has built-in monitoring functionality and user-commanded test features to ensure functionality of critical protection and monitoring circuits. This is done to prevent latent failures, which are those that cannot be detected by a protection mechanism.

GUID-29440E55-6BF9-4056-93FD-EBF183ACFDCA-low.gif Figure 3-15 Block Diagram of a Traction Inverter System with UCC5870-Q1