Author Topic: Power Supply Part 3  (Read 10285 times)

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Offline EEVblog

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Re: Power Supply Part 3
« Reply #25 on: December 31, 2011, 06:41:39 am »
Your caps look a LOT larger than mine. Is that because they are low ESR? And I suppose that is very important? If so, that probably explains what is happening.

They are polyprop caps. Any ceramic cap will be low esr.
Mine was stable with just an old 10uF electro.

Dave.
 

Offline justanothercanuck

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Re: Power Supply Part 3
« Reply #26 on: April 28, 2013, 01:00:11 am »
Sorry for the ancient bump, but I had a few questions about the PS design (pre-microcontroller)...  I figured I might give it a go, and see if I can tweak it to my liking...

1) Does my schematic look right?  I scraped it off a framegrab, so I'm not sure if I missed something...
2) Are all the op-amps used TLC2272's (U1, U2)?
3) How are the op-amps for current (U1B, U2B) powered?  Straight off VIN (P1)?
4) How important is the 10 milliohm resistance if I were to parallelize the LT3080?  With the resistance being that low, could I just tie all the outputs together and ignore it?

Thanks

Maintain your old electronics!  If you don't preserve it, it could be lost forever!
 

Offline c4757p

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Re: Power Supply Part 3
« Reply #27 on: April 28, 2013, 01:18:44 am »
Read this thread and ditch the 3080.
No longer active here - try the IRC channel if you just can't be without me :)
 

Offline justanothercanuck

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Re: Power Supply Part 3
« Reply #28 on: April 28, 2013, 01:49:14 am »
Read this thread and ditch the 3080.

I'm not sure I follow...  All I got from that thread was that it doesn't like return power on the output...  That can be worked around.  :-//

Care to elaborate?  :-BROKE
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Online Rerouter

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Re: Power Supply Part 3
« Reply #29 on: April 28, 2013, 09:57:40 am »
set and output cannot stray more than 1V from one another without risking permanent damage, or at least that is what the datasheet and some testing have strongly implied until the thread hears back from the company,
 

Offline justanothercanuck

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Re: Power Supply Part 3
« Reply #30 on: April 29, 2013, 12:10:16 am »
I'm still not quite sure what that means for this particular usage, but I guess I can always step up to the LT3083...  Saves me from buying 5 LT3080's anyways (I can buy two LT3083's and get 6A max output)...  $10 a pop sounds like a lot, but what can you do I suppose...  :-//
Maintain your old electronics!  If you don't preserve it, it could be lost forever!
 


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