[Arm-netbook] eoma68 router pcb

[Christopher Thomas]

>
> On Wed, Nov 13, 2013 at 6:34 PM, luke.leighton <luke.leighton at gmail.com>wrote:
>
>> On Wed, Nov 13, 2013 at 11:16 PM, luke.leighton <luke.leighton at gmail.com>
>> wrote:
>> > http://rhombus-tech.net/community_ideas/router/news/
>> >
>> > uh... am i reading this right - that this router design could be up to
>> > 20 watts??  4x USB2 @ 500mA (10W), 1x RTL8366 (3W) and an EOMA68 CPU
>> > Card (4W).  That's.... a hell of a lot.
>> >
>> > anyone any experience at dealing with that much power on small boards
>> > (4 amp @ 5V) ?
>>
>>  LM1084?  any guidance on PCB layout anyone aware of?
>>
>>  l.
>>
>
>
> Well, this will obviously be a 4 layer board, but I can say with the
> MEBv2, we had tremendous problems with thermal dissipation of the LM2576 at
> 9-12vdc, at 6vdc is was manageable, but the MEBv2++ are 2 layer boards, and
> with the addition of a secondary power plane, it would probably have been
> fine. For the most recent versions, we are using an AP6503a, and so far at
> 6, 9,12 vdc the heat is non-existent. Not to mention, the local price of
> the AP6503 was .60c cheaper than the LM2576, and is 85-95% more heat
> efficient.
>
>
My point in mentioning the LM2576, is that they are functionally similar to
the LM1084, and both Linear.


-- 
Christopher Thomas
Firemoth Industries, LLC - Owner
christopher at firemothindustries.com
214-458-5990
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