TIDUFF7A October   2025  – March 2026

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Terminology
    2. 1.2 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 AM2612
      2. 2.3.2 DRV7167A
      3. 2.3.3 AMC0106M05
      4. 2.3.4 DP83826A
  9. 3System Design Theory
    1. 3.1 AM2612 Motor Control and Communication Interface
    2. 3.2 DC Link and Ground Configuration
    3. 3.3 Three-Phase Inverter With DRV7167A Half-Bridge GaN Motor Driver Power Stage
    4. 3.4 Inline Shunt Precision Phase-Current Sensing With AMC0106M05 Functionally Isolated, Delta-Sigma Modulator
    5. 3.5 System Power Management
    6. 3.6 Functional Safety Concept
    7. 3.7 Ethernet Physical Layer
    8. 3.8 Position Feedback Interface
  10. 4Hardware, Software, Testing Requirements, and Test Results
    1. 4.1 Hardware Requirements
      1. 4.1.1 TIDA-010979 PCB Overview
      2. 4.1.2 TIDA-010979 Hardware Setting
    2. 4.2 Software Requirements
    3. 4.3 Test Setup
    4. 4.4 Test Results
      1. 4.4.1 Power Management and System Power Up and Power Down
      2. 4.4.2 Half-Bridge GaN Motor Driver Power Stage Switch Node
      3. 4.4.3 Power Stage Thermal Measurements
      4. 4.4.4 Phase-Current Sensing and Position Feedback
      5. 4.4.5 EtherCAT® Communication
  11. 5Design and Documentation Support
    1. 5.1 Design Files
      1. 5.1.1 Schematics
      2. 5.1.2 BOM
      3. 5.1.3 Layout Prints
      4. 5.1.4 Altium Project
      5. 5.1.5 Gerber Files
      6. 5.1.6 Assembly Drawings
    2. 5.2 Tools and Software
    3. 5.3 Documentation Support
    4. 5.4 Support Resources
    5. 5.5 Trademarks
  12. 6About the Author
  13. 7Revision History

4.4.4 Phase-Current Sensing and Position Feedback

The AMC0106M05 modulator clock input is driven from one EPWM module and the modulator output data bitstream is decimated on AM2612 MCU through a Sinc3 filter running at oversampling ratios (OSR) from 32 to 256. For detailed test results on phase-current sensing with the functional isolated modulator AMC0106M05, see the High Resolution, Small Form Factor Phase Current Sense for 48V Robotics and Servo Drives application note. Figure 4-14 shows the phase A and phase B current waveform when reference current of Q axis is set to 20A. From the test results, observe that the peak current is matched well with the reference current given in software.

TIDA-010979 Phase-Current at 20A Peak Figure 4-14 Phase-Current at 20A Peak

Figure 4-15 showcases the position data gathering from encoder 1 which represents the mechanical motor rotating angle and the electrical angle which is used for FOC control loop. The electrical angle equals the motor mechanical angle multiplied by motor pole pairs. The EYOU motor has eight pole pairs.

TIDA-010979 Encoder Position Feedback Data Figure 4-15 Encoder Position Feedback Data