On Wednesday 24 November 2004 12:28 pm, Olin Lathrop scribbled:
> Most likely possibility:  The capacitor was in backwards.  They do take it
> for a while, then BOOM.  I know you said you checked this.  Check it again.
> I still think it's the most likely explanation.

Re-verified, and it is correct.  I would've loved this to be the problem, as 
I'd have a simple fix.  :-(


> Second possibility:  The ripple current was way too high for the cap, which
> heated it up and eventually caused it to explode.
> 
> Definitely replace it.  It could look like an open, a short, or a toxic
> fume generator.

I'll replace and get a scope on it to see how much ripple is actually there.  
I was powering it off of an older switcher, which could have bad ripple.


> Not true.  Some commercial switching power supplies do indeed need a
> minimum load, but this is not inherent to switchers, only particular
> implementations.
> 
> If it has a minimum load, this should be in the data sheet.  If the data
> sheet doesn't mention it, then I would assume it has no minimum load
> requirement.

Okay ... assumption on my part.

Cheers,
-Neil.



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