CrazyEngineers
CrazyEngineers

  • TL431 shunt regulator

    Er_Mahendran

    Er_Mahendran

    @er-mahendran-ghvIBl
    Updated: Aug 17, 2009
    Views: 1.1K
    Hello,
    How to calculate the input resistance to be connected in TL431 shunt regulator. What is the maximum input voltage that can be applied?
    Thanks!
    0
    Replies
Howdy guest!
Dear guest, you must be logged-in to participate on CrazyEngineers. We would love to have you as a member of our community. Consider creating an account or login.
Replies

  • reachrkata

    Member • Aug 21, 2009

    1) The input resistance depends on the Load current - because the load current causes a voltage drop across the resistor. Therefore it should be chosen such that the drop does not cause TL431 to come out of its regulator mode.

    2) Now having chosen the input resistor, the maximum input voltage that can be applied is that which does not increase the current through TL431 more than its max rating.

    - Karthik
    😁
    Are you sure? This action cannot be undone.
    Cancel
Home Channels Search Login Register