• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 41 subscribers
  • Views 422 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

PMP22650: PMP22650

izubitur
Prodigy 60 points
Part Number: PMP22650

Can you elaborate on the purpose of the ' ACTIVE EMI SENSE' circuits?. Is it some kind of insulation monitoring device with a safety related purpose?. 

Thanks in advance

  • +1
    TI__Intellectual 1545 points

    Hi, thanks for your question.

    In a typical high-voltage application, common-mode(CM) noise dominates the EMI filter size. The origin of the CM noise is the parasitic capacitance of the switching node to the chassis. This results in voltage swings on the chassis that are synched with the converter's switching transitions (PWM). The concept of Discrete-Time Canceller based Active EMI Filter (DCAEF) is to use the timing information of the PWM signals to apply corresponding reverse voltage swings to the chassis which helps in effectively canceling the voltage swings and thus reducing the common mode EMI