How can I step up from 12V to 14V for about 80 W?

Former Member over 13 years ago

I want to run a projector from my 12V circuit.

The projector is 14V and 3.5 Amp -

I don't really want to use an inverter.

Is there a simple way to step up 12V to 14V ?

thanks v. much

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Catwell over 13 years ago +1

Matt, Here you go, Use an LM3481MM/NOPB LM3481MM/NOPB : http://www.newark.com/national-semiconductor/lm3481mm-nopb/ic-n-ch-controller-msop-10/dp/84M8119?in_merch=Popular%20Power%20Management%20Products…

0 michaelkellett over 13 years ago

What sort of projector and what sort of 12V circuit ?

If the projector wants 14V DC it might work OK from 12V - check with the supplier (or just try it if you're feeling lucky).

There is no way to efficiently convert 12V DC to 14V DC at 3.5A without using some kind of switching circuits - by the time you add all the necessary protection and emc precautions it won't be very simple.

Michael Kellett
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0 Catwell over 13 years ago

Matt,

Here you go, Use an LM3481MM/NOPBLM3481MM/NOPB : http://www.newark.com/national-semiconductor/lm3481mm-nopb/ic-n-ch-controller-msop-10/dp/84M8119?in_merch=Popular%20Power%20Management%20Products

2553.contentimage_175029.jpg

Cabe
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0 Former Member over 13 years ago

If you just want an off-the-shelf solution you may want to try to get a DC-to-DC converter from a company like Vicor. Look at: http://cdn.vicorpower.com/documents/datasheets/ds_vi-j00.pdf
which offers up to 100W supplies in a half brick. However, many times these companies offer many different outputs and inputs, but do not stock non-standard one, but it may be worth a try.
If you want to build your own as one replier suggested, ti.com or linear.com both have chips, circuits and on-line software to design supplies. Try National's (recently bought by Texas Instruments) WEBENCH at http://www.national.com/ and input the data into Webench Designer. With your input and output requirements they have about 7 or 8 different solutions including the LM3481MM/NOPBLM3481MM/NOPB from another replier.
Lee
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0 WVPhysicist over 12 years ago in reply to Former Member

Why don't they make these nice new parts as through hole or better yet monsterous so an old hog like me can bolt them to a 2x4 and solder house wiring to the pins?
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0 Former Member over 12 years ago

try to find ac/dc charger for battery or diy self made ac/dc voltage control 220 ac to 14 dc
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