[Noisebridge-discuss] DC-DC Power conversion - Cheapish finds!

[Taylor Alexander]

Funny, I was just talking with a friend yesterday who was using a much more
expensive pololu regulator. This may save him quite a bit of money since he
sells the things.


On Mon, Jan 7, 2013 at 1:19 PM, Garrett Mace <garrettmace at gmail.com> wrote:

>  On 1/7/2013 11:47 AM, Anders Nelson wrote:
>
> Hey all,
>
>  I found some awesome DC-DC non-isolated convertors on Digikey, perhaps
> you can benefit from my toils in their search fields. They are all really
> compact and handle a buttload of current. Input and output voltage ranges
> vary, but these were the cheapest and most available units I found.
>
>  You may ask "Why would I pay ten bucks for a switching convertor when I
> can pay fifty cents for an LDO?" The answer is heat dissipation and
> efficiency. If you don't want to burn people/things and/or literally reduce
> your battery life by half (in the case of 12v -> 6v conversion), you should
> use a switcher.
>
>  -3A: http://www.digikey.com/product-detail/en/PT6304N/PT6304N-ND/278552
>
>  -10A:
> http://www.digikey.com/product-detail/en/OKR-T%2F10-W12-C/811-2180-ND/2199630
>
>  -6A:
> http://www.digikey.com/product-detail/en/OKR-T%2F6-W12-C/811-2179-ND/2199629
>
>  -3A:
> http://www.digikey.com/product-detail/en/OKI-T%2F3-W32P-C/811-2287-1-ND/2708573
>
>  And here are some enclosures sized well to protect them:
>
>  http://www.boxenclosures.com/category/category_product.html?cats__id=612
>
>  You can, of course, build your own DC-DC convertor much cheaper. But
> when you haven't the time these can save your potato.
>
>  =]
> --
> Anders Nelson
>
> +1 (517) 775-6129
>
> www.erogear.com
>
>
> _______________________________________________
> Noisebridge-discuss mailing listNoisebridge-discuss at lists.noisebridge.nethttps://www.noisebridge.net/mailman/listinfo/noisebridge-discuss
>
>
> Actually, these are a fairly good deal even compared to building one
> yourself. In order to build one yourself (on the spur of the moment,
> anyway) you're pretty much limited to DIP components, which means chips
> like the LM2576 which are fairly low frequency and a few bucks on their
> own. And due to the low switching frequency, you need a pretty large
> external coil and capacitors. Overall, a self-built DC-DC converter will
> end up several times larger and heavier than these small DC-DC modules.
> I've used some of these as stopgap measures, before getting time to
> redesign with an on-board converter.
>
> --- Garrett
>
>
>
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