SDAA048 July   2025 DRV8376

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Advantages and Challenges of Low-Side Current Sensing with DRV8376
    1. 2.1 Advantages of Low Side Current Sensing
      1. 2.1.1 Low Common Mode Voltage
      2. 2.1.2 Cost Effectiveness
    2. 2.2 Challenges of Low side Current Sensing
      1. 2.2.1 Gain Error
      2. 2.2.2 Temperature Drift
  6. 3DRV8376 Current Sense Amplifier (CSA) Architecture
    1. 3.1 Gain Error vs Temperature
    2. 3.2 Calibration Methods
  7. 4Summary
  8. 5References

Abstract

The DRV8376, a three-phase motor driver with integrated low-side current-sense amplifiers, enables efficient current monitoring for BLDC motor applications, supporting overcurrent protection, torque control, and commutation. However, gain error and temperature drift can reduce measurement accuracy, affecting motor performance. This application note examines the DRV8376’s current-sense amplifier architecture and error sources, proposing practical calibration methods, including room-temperature, multi-temperature, self-calibration, and software-based compensation, to verify precision across a wide temperature range.This application note offers engineers straightforward strategies to optimize current sensing with the DRV8376.