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.

  • Resolved

UCC28780: ucc28780

Genius 3170 points

Replies: 2

Views: 63

Part Number: UCC28780

WE NEED TO INSERT REMOTE SENSING IN A MODULE DESIGNED WITH UCC28780 CONTROLLER

Remote sense amp is INA826. We use it a lot .

But it has very high output impedance in low frequencies. Remote sensing is DC.

So will the circuit in the attached pdf not adversely impact feedback as shown?

Do we not need to use a buffer amp with unity gain but low output impedance in DC?

Or should we think about some other approachucc28780_remote_sensing_issue.pdf?

Appreciate any review of this situation.

robin

  • Robin

    You should be able to use INA826 as you show.  I am not sure if you need R? (1k) on the INA826 OUT pin since you have R18+R32 (32.4k+330) on the out pin already.

    There are many examples in the INA826 datasheet with a 10k load, so the 32.73k load you have should be sufficient.

    Best Regards,
    Eric

  • In reply to Eric Faraci:

    Thnx much Eric.

    we can close the post now.

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.