[sdiy] Opinions on Switchmode PSUs for analog synths?

[Tom Bugs]

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).

On 08/11/2019 21:28, Ben Barwise wrote:
> 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 
> ECLB40W-24D12 has maximum 1650μF load, that's quite generous, but its 
> a spec to watch out for.
>
> On Fri, 8 Nov 2019 at 11:55, mark verbos <markverbos at gmail.com 
> <mailto:markverbos at gmail.com>> wrote:
>
>     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….
>
>     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.
>
>     Mark
>
>
>
>
>
>     > On Nov 8, 2019, at 6:00 AM, Michael Zacherl
>     <sdiy-mz01 at blauwurf.info <mailto:sdiy-mz01 at blauwurf.info>> wrote:
>     >
>     >
>     >> On 7 Nov 2019, at 12:51, mark verbos <markverbos at gmail.com
>     <mailto:markverbos at gmail.com>> wrote:
>     >>
>     >> 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.
>     >
>     >
>     > Hi Mark, so, how does your input side look like?
>     > 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?
>     > m.
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