Hi John,
I was speaking about noise on the Output side, which is I think the
reason why I can ear the HVPS of the circuit "singing", I don't really need
switchable output voltage, I have selected this one because I can easily reuse
it for another project in case it's to noisy :)
I'll have a look for the lowest Ripple one,
Thank you,
Julien
* John Rehwinkel <[email protected]> wrote:
> > It's almost done (hope I can share picture soon) ; the only issue is
> > coming from the wall wart I use which is a first price product and is
> > very noisy.
> >
> > Is there any certification or specification to ensure the product is
> > low noise ? I need a regulated 6V @2A (mainly because of the wifi
> > interface).
>
> Do you mean low noise on the mains side? If so, you'd probably look for
> EN55022/EN55024 compliance and possibly EN61000 (Europe) and/or FCC Part 15
> (USA). All of these contain several subsections and classes addressing
> various types and amounts of noise. There are also VCCI and CE noise specs.
>
> Or do you mean low noise on the output (6V DC) side? Then look for specs
> like max ripple and transient response.
>
> I suspect you're looking for something like this:
>
> http://www.volgen.com/datasheet/10WattSeries.pdf
>
> http://products.cui.com/CUI_EPSA060200U_Datasheet.pdf?fileID=3090
>
> Or if you don't want wall mounted, you want worldwide mains noise specs, and
> interchangeable cords for different styles of mains outlets, something like
> this:
>
> http://products.cui.com/CUI_ETSA060200U_Datasheet.pdf?fileID=5094
>
> These are all cheaper than the one you linked to (I'm not sure what a "first
> price product is"), but they don't have switchable output voltage (I don't
> know if this is important for your application).
>
> - John
>
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