TIDUF88 October   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 Accuracy of Bus Voltage Measuring
      2. 2.2.2 Shunt Current Measuring
      3. 2.2.3 Insulation Impedance Monitor
    3. 2.3 Highlighted Products
      1. 2.3.1 BQ79731-Q1
      2. 2.3.2 TPSI2140-Q1
      3. 2.3.3 ISO7841
      4. 2.3.4 SN6507
      5. 2.3.5 TPS7B6950
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Test Setup
    3. 3.3 Test Results
      1. 3.3.1 Bus Voltage Accuracy
      2. 3.3.2 Current Sensing Accuracy
      3. 3.3.3 Insulation Impedance Accuracy
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
    2. 4.2 Tools and Software
    3. 4.3 Documentation Support
    4. 4.4 Support Resources
    5. 4.5 Trademarks
  11. 5About the Author

3.2 Test Setup

Figure 3-1 shows the HMU test setup.

TIDA-010272 HMU Test Setup Figure 3-1 HMU Test Setup

Use the following procedures before running this design board. The design was constructed with a 1500V rack configuration. The board was tested using a high-voltage DC source to provide the total rack. The test points RACK– and BAT– are connected to the negative terminal of the DC source. The test point BAT+ is connected to the positive terminal of the DC source.

  1. Connect the shunt simulator to the current sensing negative terminal (SRN) and current sensing positive terminal (SRP) of CSADC1
  2. Use 50kΩ and 10MΩ high-voltage resistors as RisoP and RisoN