over voltage protection

Discussion in 'General Electronics Chat' started by bug13, Jul 1, 2013.

  1. bug13

    Thread Starter Well-Known Member

    Feb 13, 2012
    Hi guys

    I want to add a 50V over voltage protection in my constant current load, my current design is a 50W constant current load with 5A max capability.

    what would be a good low cost design? thanks
  2. Dodgydave

    Distinguished Member

    Jun 22, 2012
    Use an op amp comparator and pot it down to to say 10 volts using a resistor divider, then feed the output to Mosfet switch, or use a thyristor and zener as a crowbar.

    Can you post your circuit for better advice.
    bug13 likes this.