SDAA154 October   2025 AMC0300D , AMC0300D-Q1 , AMC0300R , AMC0306M05 , AMC0306M05-Q1 , AMC0306M25 , AMC0306M25-Q1 , AMC131M03 , AMC131M03-Q1 , AMC3301 , AMC3301-Q1 , AMC3302 , AMC3302-Q1 , AMC3306M05 , AMC3306M05-Q1 , AMC3306M25 , AMC3306M25-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Detailed Description
    1. 2.1 Cost Optimized Power Supplies
      1. 2.1.1 Transformer Winding
      2. 2.1.2 Gate Driver Supply with Zener Diode
      3. 2.1.3 Gate Driver Supply with LDO
    2. 2.2 Simplified Power Supplies:
      1. 2.2.1 Integrated DC/DC Converter Power Supply
      2. 2.2.2 Discrete Transformer
    3. 2.3 Isolated Current Sensing Locations in High Voltage Power Conversion
      1. 2.3.1 Introduction
      2. 2.3.2 Rectifier (AC to DC Converter)
      3. 2.3.3 DC/DC
      4. 2.3.4 Inverter (DC to AC Converter)
  6. 3Summary
  7. 4References

Abstract

With the increase in electrification, the need for accurate and cost-efficient isolated current sensing has grown significantly. This document shows the five most common high-side power supply options used for Texas Instruments' isolated shunt current sensing devices: AMC0300D, AMC0300R, AMC0306M05, AMC0306M25, AMC3301, AMC3302, AMC3306M05, AMC3306M25, and AMC131M03, which are all available in industrial and automotive versions.