[RFI] 1.23V-30V DC DC Buck Converter Step Down Module

[qrv at kd4e.com]

It would be used around the radio area to fill the gap, home and
mobile/portable, where I needed a voltage I don't have handy.

Increasing the size and weight somewhat is not a significant matter,
not adding more RF-trash to the radio environment is.

I'd value any specific recommendations for the common mode chokes,
etc.  I am guessing .001 ceramics for the bypass caps?

Thanks!

David


> 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 at kd4e.com <qrv at kd4e.com> To: RFI List
>> <rfi at 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