• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 30 subscribers
  • Views 388 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Current Sense High or Low Side

Murat_
Prodigy 150 points

Hello,

TI generrally prefers low side current sense in evaluation boards. 

Is it better to use low side or high side current sense (from motor phase)? 

  • 0
    TI__Expert 8885 points

    Murat,

    Low side current sense is preferred to get  best solution in terms of cost and less noise. Motor phase sensing  comes with high common mode noise which requires costly Hall-sesnor or other  isolated  sigma delta current sensors such as AMC130x  to remove the common mode noise from sensing.

    High side sensing is used in High voltage (typically 300V and above)  and at higher power such as AC drives in 10s of kW range, in  such system cost of current sensing is small compared to over-all system cost. Most of TI EVMs are target for low voltage segment within 48Volt/1kW, in such system addtional cost due to current sensor is not justifiable therefore TI's EVMs uses low side current sensing to give cost -efffective solution.

    In fact HV motor control kit also uses low side current sense.

    Best Regards

    Milan-Motor Application Team