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<p>I've not found this to be an issue in practice - the Cincon 15W I
use suggests max 550u - my modules have 220u on power entry &
the frame will happily run any combination I've tried (max 2400u).<br>
</p>
<div class="moz-cite-prefix">On 08/11/2019 21:28, Ben Barwise wrote:<br>
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<div dir="ltr">Apart from ripple, a small problem I have found
with DC/DC converters is that there is a maximum capacitive
load. Correct me if I am wrong but I think what tends to happen
is it trips the short circuit protection when the module is
powering up because of the inrush current. I have seen them get
stuck in a hiccup like loop (this was in a non synth project
with a lot of caps!). Could be an issue if you are powering a
lot of mixed modules in a modular. For example the <span
class="gmail-im">ECLB40W-24D12 has ma</span>ximum 1650μF load,
that's quite generous, but its a spec to watch out for. <br>
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<div dir="ltr" class="gmail_attr">On Fri, 8 Nov 2019 at 11:55,
mark verbos <<a href="mailto:markverbos@gmail.com"
moz-do-not-send="true">markverbos@gmail.com</a>> wrote:<br>
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<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">I
put a regulator diode on the input side, to protect against
reverse voltage frying it, but I’m not sure if that is
necessary. The “15 VDC” comes in on a 2.1mm barrel connector
from an external brick. It goes through a switch, a diode and
a cap to ground before the DC-DC converter. The advantage is
that it is 90% efficient, weighs less, can be plugged in
anywhere in the world without a converter, doesn’t get hot,
hardly takes up any space, maybe more….<br>
<br>
I had to replace the transformer in a TR-909 this year because
someone plugged a Japanese one into a European outlet. Inside,
it’s just a jumper to change it, but the owner didn’t know
that. It makes me wonder if replacing the transformer with a
SMPS would be a better solution. I didn’t, but I wonder.<br>
<br>
Mark<br>
<br>
<br>
<br>
<br>
<br>
> On Nov 8, 2019, at 6:00 AM, Michael Zacherl <<a
href="mailto:sdiy-mz01@blauwurf.info" target="_blank"
moz-do-not-send="true">sdiy-mz01@blauwurf.info</a>>
wrote:<br>
> <br>
> <br>
>> On 7 Nov 2019, at 12:51, mark verbos <<a
href="mailto:markverbos@gmail.com" target="_blank"
moz-do-not-send="true">markverbos@gmail.com</a>> wrote:<br>
>> <br>
>> I use the ECLB40W-24D12 which is a 40W metal can one.
It will take pretty much any DC you throw at it (9V-36V per
the datasheet). I put some big caps to ground on the output of
them.<br>
> <br>
> <br>
> Hi Mark, so, how does your input side look like? <br>
> ATM that implementation appears like the (aforementioned)
hybrid version to me where I can’t really see its advantage
over a linear PSU. Only reason, maybe, I can’t find a +/-
SMPSU using mains voltage?<br>
> m.<br>
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