TIDUEY6 April   2021

 

  1.   Description
  2.   Resources
  3.   Features
  4.   Applications
  5.   5
  6. 1System Description
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 C2000 MCU F2838x
      2. 2.3.2 UCC5870-Q1 Gate Driver
  8. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
      1. 3.1.1 Hardware Overview
        1. 3.1.1.1 Control Module
          1. 3.1.1.1.1 Control Mother Board
            1. 3.1.1.1.1.1 Inverter Safing - UCC5870 ASC and Fault Control
            2. 3.1.1.1.1.2 DC-DC Safing
            3. 3.1.1.1.1.3 DC-DC Converter Secondary PWM Selection
            4. 3.1.1.1.1.4 Blower Fan Control
            5. 3.1.1.1.1.5 Voltage Monitor
            6. 3.1.1.1.1.6 Resolver Interface Control
            7. 3.1.1.1.1.7 Test Points on Control Module
            8. 3.1.1.1.1.8 General Purpose Ports
            9. 3.1.1.1.1.9 Connectors and Headers on Control Mother Board
          2. 3.1.1.1.2 Power Supplies
            1. 3.1.1.1.2.1 Power Supply 5V /5A
            2. 3.1.1.1.2.2 Power Supply 12-V/1-A
            3. 3.1.1.1.2.3 Power Supply 15-V/0.5-A
          3. 3.1.1.1.3 TCAN4550 module
          4. 3.1.1.1.4 Dual TCAN Module
          5. 3.1.1.1.5 Analog Back End Module
          6. 3.1.1.1.6 Resolver Analog Front End Module
        2. 3.1.1.2 Inverter Module
          1. 3.1.1.2.1 Inverter Mother Board
            1. 3.1.1.2.1.1 Connectors and Headers on Inverter Mother Board
            2. 3.1.1.2.1.2 Jumper and Test Points on Inverter Module
          2. 3.1.1.2.2 Inverter Gate Driver Module
            1. 3.1.1.2.2.1 Inverter Gate Drive Power Supply Module
          3. 3.1.1.2.3 Inverter Current Sense Module
          4. 3.1.1.2.4 Inverter Voltage Sense Module
        3. 3.1.1.3 DC-DC Bidirectional Converter Module
          1. 3.1.1.3.1 DC-DC Converter Mother Board
          2. 3.1.1.3.2 DC-DC Gate Driver Module
    2. 3.2 Resource Mapping
    3. 3.3 Test Setup
    4. 3.4 Test Results
  9. 4General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines
  10. 5Design and Documentation Support
    1. 5.1 Design Files
      1. 5.1.1 Schematics
      2. 5.1.2 BOM
    2. 5.2 Software
    3. 5.3 Documentation Support
    4. 5.4 Support Resources
    5. 5.5 Trademarks
  11. 6About the Author
3.1.1.3.2 DC-DC Gate Driver Module

Isolated gate drive module for DC-DC is designed as a separate daughter card to drive a high voltage half-bridge. This is to reduce contact lengths between power supplies and gate driver secondary circuits and reduce routing complexity. This module is designed using UCC21530-Q1 isolated half bridge gate driver and SN6505-Q1 isolated power supply driver. The UCC21530 supports enable function which allows the MCU to disable power stage independent of PWM output. The isolated power supply is designed with a second layer of enable and designed to generate gate drive voltages of +15 V and -4 V for the SiC MOSFET selected for the primary full bridge. The power supply is designed based on a regulated 5 V input with no secondary regulation. A picture of the board is shown in Figure 3-28.

GUID-20201203-CA0I-VLFW-JWNW-GW19MQDZQT4P-low.jpg Figure 3-28 DC-DC Isolated Gate Driver