[sdiy] power switch bounce?

[Dave Leith]

I just found this link by googling. It's a pdf of an article from june
1994  Electronic Design Analog Applications and it covers some of the
PowerOne and clones issues. Not sure if this would still be current
though.

http://tinyurl.com/y8vbav7

D

On 3/8/10, jeff brown <guitaricon at verizon.net> wrote:
> Tony,
>
>  I'm interested as well. I have 3 PowerOne PSU's in my monster modular, and
> 2 of them do the exact same thing (intermittently), and I'm allready using
> the Ken Stone power delays.
>
>  Jeff
>
>  ----- Original Message ----- From: "mark verbos" <mverbos at earthlink.net>
>  To: <oakleylist at btinternet.com>
>  Cc: "Synth DIY" <synth-diy at dropmix.xs4all.nl>
>  Sent: Monday, March 08, 2010 2:45 PM
>  Subject: Re: [sdiy] power switch bounce?
>
>
>
>
> > Tony, I'd be willing to mod the supplies. Could you send me the  details
> of what you did to them?
> >
> > Mark
> >
> >
> >
> > On Mar 8, 2010, at 2:48 AM, Oakley Sound wrote:
> >
> >
> > > This is a known problem with Power One supplies - and their clones.  It
> is related to the current foldback limiting. Diodes on the rails  didn't
> seem to have much affect.
> > >
> > > I asked Power One about this - one chap got back to me and got all
> shirty and told me that there was nothing I could do but buy a  bigger
> supply and that no one would give me the schematic so why did  I bother
> asking. The amusing thing was that only minutes earlier  someone else in the
> same company replied with lots of useful  information and a schematic.
> > >
> > > Ultimately, the upshot of this was that I modded several Power Ones  for
> standard current limit and removed the foldback limiting  completely. Whilst
> not the most acceptable solution it was a  workable one given the relatively
> large heatsinks and low currents  that these supplies were capable of.
> > >
> > > If modding the PSU is not acceptable I'd second going for one of  Ken's
> sequenced power up modules.
> > >
> > > Also, keep any raw power supply decoupling on each module down to  less
> than 3uF unless used with a series resistor.
> > >
> > > Tony
> > >
> > > www.oakleysound.com
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> > >
> >
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