TIDUF73 September   2024

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 Design Theory
      2. 2.2.2 Resistor Selection
        1. 2.2.2.1 Transistor and Diode Selection
      3. 2.2.3 Overcurrent Detection – Short-Circuit Protection
    3. 2.3 Highlighted Products
      1. 2.3.1 TPSI3100-Q1
      2. 2.3.2 INA180-Q1
      3. 2.3.3 TPSI2140-Q1
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
      1. 3.1.1 External Hardware Requirements
    2. 3.2 Test Setup
    3. 3.3 Test Results
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
    2. 4.2 Tools
    3. 4.3 Documentation Support
    4. 4.4 Support Resources
    5. 4.5 Trademarks
  11. 5About the Author

Description

This reference design implements a common circuit in high-voltage DC buses – precharge – with newer, smaller, and more cost-efficient components. This design features the TPSI3100-Q1 isolated switch driver, which provides reinforced isolation between voltage domains and does not require a secondary side bias supply for driving field-effect transistors (FET). TPSI3100-Q1 also offers integrated digital comparators for fault detection which, in this design, is used for overcurrent protection. This design is rated for an 800V battery management system (BMS) but can also be implemented in 400V systems.