Specific overvoltage protection

Discussion in 'The Projects Forum' started by millep, Jan 14, 2010.

  1. millep

    Thread Starter New Member

    Jan 14, 2010

    I would like to design a specific overvoltage protection.
    Here are the parameters:

    Input voltage:
    nominal 10 à 35V
    surtensions -> 120V

    Output : DC DC converter with a 10 to 40V input range.
    In case of overvoltage, the DC DC converter should work because even very short power cuts is problematic.

    The system consumes about 40mA under 5V and we can assume the efficiency of the converter 80%.

    Could you help me design this?
    Tell me if any information is missing!

    Thank you very much for your help!,

  2. BillB3857

    Senior Member

    Feb 28, 2009
    Normal overvoltage protection for DC circuits are set to a specific voltage trip point. I am confused by the requirement that the output must b DC to DC converter. Normal overvoltage protection is shutdown of the output with possible indication of the trip being cause of the shutdown. Exactly what are you trying to minitor?