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Help on PSU short circuit shut down

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LAN_403

JamesH

Tue Jun 14 2011, 07:27PM

Registered Member #579 Joined: Mon Mar 12 2007, 09:45AM
Location: Burntwood, Staffs, England
Posts: 46

I am building ( another) PSu and would like it to shut down when the output is shorted
I would like to use a relay that is tripped by the fault condition - as happens with my Maplin PSU
I have an idea of using a SCR and relay but cannot quite work out how to do it
Has any one a circuit or block diagram to do this plese
I expect to be using fixed out puts 9V 12V and 28V max current about 4amps

Arcstarter

Wed Jun 15 2011, 01:53AM

Registered Member #1225 Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253

Well what kind of PSU is it? Iron core transformer, or smps?

Would you prefer using no ICs to do it, or is an IC ok?

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