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Old 4th February 2013, 08:15 PM   #1
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Default +&- 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

Last edited by Graemedench; 4th February 2013 at 08:46 PM. Reason: Try to make it sound less "do it for me"
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Old 4th February 2013, 11:39 PM   #2
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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.
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Old 4th February 2013, 11:58 PM   #3
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Are you looking for +/-45V @ 25A ?

That'll require at least 200A from your 12V supply.
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Old 5th February 2013, 12:21 AM   #4
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Quote:
Originally Posted by Graemedench View Post
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!]
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Old 5th February 2013, 12:25 AM   #5
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Quote:
Originally Posted by KatieandDad View Post
Are you looking for +/-45V @ 25A ?

That'll require at least 200A from your 12V supply.
perhaps 20 truck batteries in //
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Old 5th February 2013, 01:37 AM   #6
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Or just 8 in series.
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Old 5th February 2013, 01:45 AM   #7
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Quote:
Originally Posted by KatieandDad View Post
Or just 8 in series.

hahahhahaha

BUT it is not regulated AND

you still need to // to get the current
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Old 5th February 2013, 01:47 AM   #8
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Whatever, it's still a lot of power to source from a 12V supply.
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Old 5th February 2013, 06:56 AM   #9
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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
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Old 5th February 2013, 10:39 AM   #10
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Quote:
Originally Posted by KMossman View Post
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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