The answer to your question is partly controlled by your intended
application. What do you wish to do with it, if you bought one?
A few things are obvious: it is a "bare card", so you would need a
conductive housing and INPUT/OUTPUT filtering for starters. Note that the
switching frequency is given as 150 kHz and output ripple as 30 mV, max.
Keep in mind that they are saying 30 mV of ripple @ either 150 or 300 kHz
(depends upon whether or not they use full wave rectification). They also
don't say if the 30 mV is Pk-to-Pk or RMS. The ripple is also most likely
to be as measured differentially (between the pair of output leads), not
between an earth ground and either lead (common mode).
You could make this work by using a suitable size minibox chassis (with
vent holes) and common mode chokes (placed within the chassis) and by-pass
caps on the input and output leads. All of that will increase size,
weight, and cost, so again - what's the intended app? Maybe you can live
with a "screamer".
73,
Dale Svetanoff, WA9ENA
Sr EMC Engineer
E-N-A Systems, LLC
Specializing in shielding applications, system grounding, and lightning
protection
> [Original Message]
> From: qrv@kd4e.com <qrv@kd4e.com>
> To: RFI List <rfi@contesting.com>
> Date: 1/5/2013 3:52:15
> Subject: Re: [RFI] 1.23V-30V DC DC Buck Converter Step Down Module
>
> Corrected post & link ...
>
> What are the chances that this 4V-35V IN to
> 1.23v - 30v OUT 3A DC-DC buck converter is
> a RFI nightmare?
>
> http://www.ebay.com/itm/110950894139
>
>
> --
>
> Thanks! & 73, KD4E.com
> David Colburn nevils-station.com
> I don't google I SEARCH! duckduckgo.com
> Network: groups.yahoo.com/group/qrv
> Restored to design-spec at Heaven's gate 1Cor15:22
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