Re: undervoltage lockout for flyback powersupply input

Jamie Morken wrote:

Hi,

I have a flyback powersupply that operates from about 20V to 450V+ (AC or DC input) and I would like to reduce the operation to 75V to 450V,
what is a possible circuit to use on its input to keep it from starting
up until this threshold is reached?

cheers,
Jamie



here is the schematic:

http://rocketresearch.nekrom.com/new/flyback/flyback5.jpg

cheers,
Jamie
.