Schottky diode as rectifier - Page 2 - Electronic Circuits Projects Diagrams Free

Roff · 5th January 2008, 04:00 AM

Quote:

Originally Posted by speakerguy79

FWIW, I experimentally discovered my 1N5822's will actually do 50% more PIV than they're rated for. Failed short though - is that normal?

Yeah, they usually get longer.

speakerguy79 · 5th January 2008, 04:11 AM

I should neg rep you for that

Roff · 5th January 2008, 04:34 AM

Quote:

Originally Posted by speakerguy79

I should neg rep you for that

I know. I just couldn't resist.
I got a thanks and a balanced rep for this thread. What does a balanced rep mean? I suppose it is open to interpretation by the repper.

speakerguy79 · 5th January 2008, 05:30 AM

No one ever pos reps me here

And I've got almost 400 posts. Hrmph.

On my other forum I've got mad rep. I got +3 in one day in recognition for calling the Iowa caucuses dead on (it's a politics/religio-stuff forum, so I won't mention any more here).

But seriously, do Schottky's generally fail as a dead short? My power supply was current limiting at 12.5A at a few tenths of a volt after it went.

**Nigel Goodwin** · 5th January 2008, 02:11 PM

Quote:

Originally Posted by speakerguy79

But seriously, do Schottky's generally fail as a dead short? My power supply was current limiting at 12.5A at a few tenths of a volt after it went.

Most diodes usually fail dead short, not just Schottky's.

Styx · 5th January 2008, 04:21 PM

most discrete silicon have a failure mode of short-cct

mvs sarma · 5th January 2008, 06:23 PM

Quote:

Originally Posted by Roff

I know. I just couldn't resist.
I got a thanks and a balanced rep for this thread. What does a balanced rep mean? I suppose it is open to interpretation by the repper.

perhaps he would have meant balanced reputation i thought , but now i understand balanced report only

mvs sarma · 5th January 2008, 06:30 PM

Quote:

Originally Posted by speakerguy79

No one ever pos reps me here

And I've got almost 400 posts. Hrmph.

On my other forum I've got mad rep. I got +3 in one day in recognition for calling the Iowa caucuses dead on (it's a politics/religio-stuff forum, so I won't mention any more here).

But seriously, do Schottky's generally fail as a dead short? My power supply was current limiting at 12.5A at a few tenths of a volt after it went.

i too have seen shorted Schottky diodes and even zenor diodes are notorius for shrting under spiky supplies or inductive back emf spikes.

speakerguy79 · 5th January 2008, 06:43 PM

Well, this was me putting 60VDC on a 40V diode, so in this case the blame lays squarely with me

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5th January 2008, 04:11 AM	(permalink)
speakerguy79	I should neg rep you for that

5th January 2008, 05:30 AM	(permalink)
speakerguy79	No one ever pos reps me here And I've got almost 400 posts. Hrmph. On my other forum I've got mad rep. I got +3 in one day in recognition for calling the Iowa caucuses dead on (it's a politics/religio-stuff forum, so I won't mention any more here). But seriously, do Schottky's generally fail as a dead short? My power supply was current limiting at 12.5A at a few tenths of a volt after it went. Last edited by speakerguy79; 5th January 2008 at 05:33 AM.

5th January 2008, 04:21 PM	(permalink)
Styx	most discrete silicon have a failure mode of short-cct __________________ Nothing is impossible. Once a problem is realised, the rest is just details

5th January 2008, 06:43 PM	(permalink)
speakerguy79	Well, this was me putting 60VDC on a 40V diode, so in this case the blame lays squarely with me