TIDUFG2 December   2025

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Terminology
    2. 1.2 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 Sensor Selection
    3. 2.3 Highlighted Products
      1. 2.3.1 TLV387
      2. 2.3.2 TLV9054
      3. 2.3.3 MSPM0G5187-LP
      4. 2.3.4 LOG300
      5. 2.3.5 UCC28881
      6. 2.3.6 TPS709
  9. 3System Design Theory
    1. 3.1 Current Sensor
    2. 3.2 Hybrid Integrator
    3. 3.3 Band-Pass Filter
      1. 3.3.1 Log Amplifier
      2. 3.3.2 Current Low-Pass Filter
      3. 3.3.3 Non-isolated Voltage Sensing
      4. 3.3.4 Auto Labeling Circuit
        1. 3.3.4.1 Line Voltage Sensing
        2. 3.3.4.2 Arc Gap Voltage Sensing
        3. 3.3.4.3 Differential to Single-Ended Conversion
      5. 3.3.5 Power Supply
  10. 4Hardware, Software, Testing Requirements, and Test Results
    1. 4.1 Hardware Requirements
    2. 4.2 Software
    3. 4.3 Test Setup
      1. 4.3.1 Arc Testing Setup
    4. 4.4 Test Results
  11. 5Design and Documentation Support
    1. 5.1 Design Files
      1. 5.1.1 Schematics
      2. 5.1.2 BOM
    2. 5.2 Tools and Software
    3. 5.3 Documentation Support
    4. 5.4 Support Resources
    5. 5.5 Trademarks
  12. 6About the Author

4.3 Test Setup

Before powering the board verify that all connections are properly screwed down and that the LaunchPad connects with the ground and power pins matching the reference design. First verify the analog signal chain before high-voltage testing.

  1. Connect the LaunchPad to the interface below the board according to the connections in Section 2.1, Figure 2-2:
    TIDA-010971 Test Setup Diagram Figure 4-1 Test Setup Diagram
  2. Wire a 12AWG insulated wire through the Rogowski and connect to AC power supply and 12Ω power resistor rated for more than 50W to the parallel load connection.
  3. Plug in the USB cable to a USB power source and the LaunchPad. On power up, check that the LED D6 glows blue.
  4. The test pins are labeled Current-LPF, and LOG. Test with low voltage first, 12VAC, 1A 60Hz load. Have the low-pass and band-pass filter inputs AC coupled on the oscilloscope.
    1. Verify Current LPF output is 134mV peak to peak
    2. Verify Integrator output is 15mV peak to peak
    3. Verify LOG: output is 900mV – this can fluctuate depending on the environmental noise.