Hello,

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!,

A+,
Fr

 

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?