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-   -   +&- 45VDC from 12-15VDC @25A output (http://www.diyaudio.com/forums/power-supplies/229346-45vdc-12-15vdc-25a-output.html)

Graemedench 4th February 2013 08:15 PM

+&- 45VDC from 12-15VDC @25A output
 
Looking for help

As above

I've never built or even looked at DC-DC converters, A lot of audio circuits though.

How hard will this be? Can anyone point me in the direction of circuits, Or info on theory so I can learn :)

nigelwright7557 4th February 2013 11:39 PM

A DC-DC converter will be the most efficient way to convert.

That's quite a hefty current so care will need to be taken.

KatieandDad 4th February 2013 11:58 PM

Are you looking for +/-45V @ 25A ?

That'll require at least 200A from your 12V supply.

KMossman 5th February 2013 12:21 AM

Quote:

Originally Posted by Graemedench (Post 3356013)
I've never built or even looked at DC-DC converters, A lot of audio circuits though.

25A !!!! there are a number of commercial products [google is your friend].

Several of the major IC companies make dc-to-dc boost chips - several have 'interactive' design guides on their website

It is not hard for low current [say <2A] boosters - both using discrete and IC approaches [again, google is your friend!]

KMossman 5th February 2013 12:25 AM

Quote:

Originally Posted by KatieandDad (Post 3356250)
Are you looking for +/-45V @ 25A ?

That'll require at least 200A from your 12V supply.

perhaps 20 truck batteries in //

KatieandDad 5th February 2013 01:37 AM

Or just 8 in series.

KMossman 5th February 2013 01:45 AM

Quote:

Originally Posted by KatieandDad (Post 3356354)
Or just 8 in series.


hahahhahaha

BUT it is not regulated AND

you still need to // to get the current

KatieandDad 5th February 2013 01:47 AM

Whatever, it's still a lot of power to source from a 12V supply.

Graemedench 5th February 2013 06:56 AM

Thanks chaps I'll look into the manufactures sites. Didn't think they'd be as helpful as that. I should have checked :)

I'll keep you uptodate with my plans

FoMoCo 5th February 2013 10:39 AM

Quote:

Originally Posted by KMossman (Post 3356363)
hahahhahaha

BUT it is not regulated AND

you still need to // to get the current

Series-Parallel? Followed by a linear regulator?


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