SBAU488 June   2025 AMC23C15 , AMC3302

 

  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
  8. 2Hardware
    1. 2.1 Hardware Overview
    2. 2.2 Assembly Instructions
    3. 2.3 Interfaces
      1. 2.3.1 Analog Input
      2. 2.3.2 Isolated Amplifier (AMC3302) Analog Output
      3. 2.3.3 Isolated Comparator (AMC23C15) Analog Output
    4. 2.4 Power Requirements
      1. 2.4.1 VDD2 Input
    5. 2.5 Test Points
    6. 2.6 Lug Information
    7. 2.7 Best Practices
  9. 3Implementation Results
    1. 3.1 Evaluation Procedure
      1. 3.1.1 Equipment Setup
      2. 3.1.2 Test Procedure
      3. 3.1.3 Full Signal Chain Evaluation Procedure
    2. 3.2 Performance Data and Results
      1. 3.2.1 Shunt Selection Calculations
      2. 3.2.2 Filter Selection
  10. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  11. 5Additional Information
    1. 5.1 Trademarks
  12. 6Related Documentation

3.2.1 Shunt Selection Calculations

Consider desired input range and power dissipated when selecting a shunt resistor for high current applications.

  • The following equation calculates the ideal shunt resistance:
    .    RSHUNT=VI=50mV(Input Range of AMC3302)200A(Current Range)=250μΩ
  • The following equation calculates the amount of power dissipated:
    .    P=I2R=200A2×250μΩ=10W

Power dissipated must be ⅔ of the shunt resistor power rating for heat dissipation at high currents. See application note, Shunt Resistor Selection for Isolated Data Converters, for more information.