TIDUEZ9B July   2022  – April 2023

 

  1.   Description
  2.   Resources
  3.   Features
  4.   Applications
  5.   5
  6. 1System Description
    1. 1.1 Isolated Current Measurement
    2. 1.2 Band-Pass Filter
    3. 1.3 Analog-to-Digital Conversion
    4. 1.4 Arc Detection Algorithm
    5. 1.5 Key System Specifications
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 Current Transformer Circuit
      2. 2.2.2 Analog Band-Pass Filter
      3. 2.2.3 Analog-to-Digital Conversion
      4. 2.2.4 Power Supply
      5. 2.2.5 Debugging and Status Indication Options
    3. 2.3 Highlighted Products
      1. 2.3.1 TPS259474
      2. 2.3.2 TPS562202
      3. 2.3.3 TPS745
      4. 2.3.4 OPAx322
      5. 2.3.5 ADS8363
      6. 2.3.6 REF5025
      7. 2.3.7 TMDSCNCD280049C
  8. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware and Software Requirements
      1. 3.1.1 Hardware
      2. 3.1.2 Software
        1. 3.1.2.1 Arc Detection Theory
        2. 3.1.2.2 Software Implementation
    2. 3.2 Test Setup
      1. 3.2.1 ControlCARD Configuration
      2. 3.2.2 Setup for Hardware and Software Validation
      3. 3.2.3 Setup for Arc Testing
    3. 3.3 Test Results
      1. 3.3.1 Test Results of Hardware and Software Validation
      2. 3.3.2 Testing With Arcs
  9. 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 Support Resources
    4. 4.4 Trademarks
  10. 5About the Author
  11. 6Revision History

2.2.5 Debugging and Status Indication Options

For debugging and status indication, there are a few different options in this design. First, there are three LEDs for the 5.25-V (D11), 5-V (D10), and 3.3-V (D12) supply voltages and four additional LEDs (D5, D6, D7, and D8) added, which are controlled via GPIOs of the C2000 controlCARD. Additionally, there are two DAC channels routed from the C2000 controlCARD to connector J6, which is used for the indicated different states as well. Additionally, there is one GPIO signal and GND connected to J6, where the GPIO is used for an external interrupt to start the arc detection or as an error output to a different part of the system. Resistors R100, R101, R102, and R103 can be populated in a different way to indicate different versions of the PCB to the software. These debugging and indication options are not implemented in the available software yet. Table 2-1 gives an overview of the debugging options and the related GPIOs and pin numbers they are connected to with a short summery of the function.

Table 2-1 Debugging and Status Indication Overview
PARTS GPIO NUMBER HSEC PIN NUMBER FUNCTION
D11 - - Status indication of 5.25-V supply
D10 - - Status indication of 5-V analog supply
D12 - - Status indication of 3.3-V supply
D5 GPIO37 58 Generic status LED (unused by default)
D6 GPIO35 60 Generic status LED (unused by default)
D7 GPIO39 62 Generic status LED (unused by default)
D8 GPIO23 64 Generic status LED (unused by default)
J6 Pin 1 - - GND
J6 Pin 2 - 11 DACA output (unused by default)
J6 Pin 3 - 9 DACB output (unused by default)
J6 Pin 4 GPIO34 86 External input with pulldown (unused by default)
R100, R102 GPIO5 70 Optional board indication. R100 is pullup R102 is pulldown. Both are DNP by default
R101, R103 GPIO4 68 Optional board indication. R101 is pullup R103 is pulldown. Both are DNP by default