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

1.5 Key System Specifications

Table 1-1 details the key system specifications.

Table 1-1 Key System Specifications
PARAMETER SPECIFICATION COMMENT
Maximum DC voltage 1000 V
Maximum DC current 10 A Limited by CT current capability and saturation behavior
Frequency band for arc detection 10 kHz to 100 kHz Modifiable with analog filter and software
Sampling rate per channel 250 kSPS Can be modified for higher frequency bands
Number of channels 1 to 4 Depends on C2000 controlCARD used
ADC resolution 16-bit (ADS8363) Optional a C2000 internal ADC can be used
Auxiliary supply voltage 8 V to 16 V
Interface ADS8363 to C2000 1 SPI module per 2 active channels Custom SPI, as described in the Interfacing to the ADS8363 Pseudo-Differential Operating Mode application note

GUID-E6E50D60-2200-40DA-9902-3DC3155245EF-low.gif
CAUTION:

Do not leave the design powered when unattended.
GUID-0A112DE2-4780-43B9-B438-8187C5499087-low.png
WARNING:

High voltage! Accessible high voltages are present on the board. Electric shock is possible. The board operates at voltages and currents that may cause shock, fire, or injury if not properly handled. Use the equipment with necessary caution and appropriate safeguards to avoid injuring yourself or damaging property. For safety, use of isolated test equipment with overvoltage and overcurrent protection is highly recommended.

TI considers it the user's responsibility to confirm that the voltages and isolation requirements are identified and understood before energizing the board or simulation. When energized, do not touch the design or components connected to the design.

GUID-D9BEBC20-188D-4CBD-A202-356FDC060593-low.gif
WARNING:

Hot surface! Contact may cause burns. Do not touch!

Some components may reach high temperatures > 55°C when the board is powered on. Do not touch the board at any point during operation or immediately after operating, as high temperatures may be present.
GUID-E6E50D60-2200-40DA-9902-3DC3155245EF-low.gif
WARNING:

TI intends this reference design to be operated in a lab environment only and does not consider it to be a finished product for general consumer use. The design is intended to be run at ambient room temperature and is not tested for operation under other ambient temperatures.

TI intends this reference design to be used only by qualified engineers and technicians familiar with risks associated with handling high-voltage electrical and mechanical components, systems, and subsystems.

There are accessible high voltages present on the board. The board operates at voltages and currents that may cause shock, fire, or injury if not properly handled or applied. Use the equipment with necessary caution and appropriate safeguards to avoid injuring yourself or damaging property.