SBAA666 February   2025 AMC0106M05 , AMC0106M25

1.   1
2.   Abstract
3.   Trademarks
4. 1Introduction
5. 2Design Challenges
6. 3Design Approach
   1. 3.1 AMC0106Mxx Functionally Isolated Modulators
   2. 3.2 Circuit Design and Layout
   3. 3.3 Sinc3 Filter Design
7. 4Test and Validation
   1. 4.1 Test Setup
   2. 4.2 Digital Interface
   3. 4.3 DC Accuracy, Noise, and Effective Number of Bits
   4. 4.4 PWM Rejection
      1. 4.4.1 DC Phase Current Measurement Over One PWM Cycle
      2. 4.4.2 AC Phase Current Measurement at 100kHz PWM
   5. 4.5 Bootstrap Supply Validation and AVDD Ripple Rejection Tests
      1. 4.5.1 LMG2100R044 Bootstrap Supply With Low Voltage-Ripple
      2. 4.5.2 Discrete Bootstrap Supply With High Voltage-Ripple
8. 5Summary
9. 6References

High Resolution, Small Form Factor Phase Current Sense
for 48V Robotics and Servo Drives