SBAU461 May   2024 INA790B , INA791B

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
    5. 1.5 General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines
  8. 2Hardware
    1. 2.1 Circuitry
      1. 2.1.1 Bypass Capacitors
      2. 2.1.2 Output Filter
      3. 2.1.3 Configurable Gain
      4. 2.1.4 Configurable Reference Voltage
      5. 2.1.5 Thermal Alert Function
      6. 2.1.6 Load Connectors
      7. 2.1.7 INA79x Current-Sense Amplifier
  9. 3Implementation Results
    1. 3.1 Operation
      1. 3.1.1 Measurements
      2. 3.1.2 Advanced Measurement Tips
  10. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layout
    3. 4.3 Bill of Materials
  11. 5Additional Information
    1. 5.1 Trademarks
  12. 6Related Documentation From Texas Instruments

3.1.1 Measurements

The following procedures are used to configure a measurement evaluation with an electronic load.

For low-side measurements:

  1. Connect the electronic load positive input terminal to the positive terminal of a supply capable of sourcing the desired amount of maximum load current.
  2. Connect the electronic load negative output terminal to the load sinking terminal of the EVM
  3. Connect the load sourcing terminal of the EVM (IS+ or IS–) to the external supply GND
  4. Turn on all the connected supplies
  5. Apply load with electronic load or actual system load
  6. Measure the output voltage at the OUT test point

For high-side measurements:

  1. Connect the electronic load positive input terminal to the load sourcing terminal (IS+ or IS–) of the EVM. For high-side measurement of forward current, IS– sources to the electronic load; for reverse current, IS+ sources to the load.
  2. Connect the electronic load negative output terminal to the external supply GND terminal
  3. Connect the external supply to the load sinking terminal of the EVM
  4. Turn on all the connected supplies
  5. Apply load with electronic load or actual system load
  6. Measure the output voltage at the OUT test point

Note:

Set VREF, Gain and load current direction so that the output voltage is within the linear range between GND and VS.