[sdiy] P-p-power!!!

Ullrich Peter Peter.Ullrich at kapsch.net
Tue Apr 16 07:53:53 CEST 2019


Nice, but be aware - the datasheet says: input reverse polarity protection: no


Von: Synth-diy <synth-diy-bounces at synth-diy.org> Im Auftrag von ulfur hansson
Gesendet: Dienstag, 16. April 2019 03:17
An: Tim Ressel <timr at circuitabbey.com>
Cc: SYNTH DIY <synth-diy at synth-diy.org>
Betreff: Re: [sdiy] P-p-power!!!

I've been using this CUI DC-DC converter for recent projects. no additional caps or circuitry needed, plus it has overcurrent/reverse polarity protection.


it is super sleek!

mán., 15. apr. 2019 kl. 21:09 skrifaði Tim Ressel <timr at circuitabbey.com<mailto:timr at circuitabbey.com>>:

I am putting together a power supply for my new 5U case. At first I just
have 7815 and 7915 regulators. But then it occurred to me: would it not
be indeed nice to have both rails fold back if one over currents? to
answer my own question, why yes, yes it would.

So now to make it work. I thought of using LM317 and LM337s and do a
cross-over thing. Use an op-amp to servo off of a virtual ground set up
with a voltage divider. I am not sure if that will do what I want. I
guess I can try it with the 'L' versions; easier to put into foldback.

I also thought of using LM723s but that gets complicated in a hurry.
More than I want.


--Tim (musing aloud) Ressel

--Tim Ressel
Circuit Abbey
timr at circuitabbey.com<mailto:timr at circuitabbey.com>

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