Would it be possible to make a power supply that could be switched for 12, 18, and 24 volts and provide a current around or over 10amps?

I know there are components like the lm317, but they are only able to supply 1.5amps.

Thanks

 

It's absolutely possible, but not with any integrated regulators. It would have to be a discrete design.

 

Hello,

There are regulators with higher current.
There is the LT1085 for 3A,
the LT1084 for 5A,
and the LT1083 for 7.5 A.

If you want more current there are applications where 2 are set parallel in the datasheet.

Greetings,
Bertus

 

LT1038 is a 10Amp linear adjustable regulator.

 

Hi,
At 10A linear regulator will have too much power wastage causing too much heating and will require a huge heatsink and/or fan. For 10A a switching regulator would be a way better solution. You should consider the L4970.
Here's the datasheet:
http://www.st.com/stonline/products/literature/ds/1361/l4970a.pdf

 

I guess maybe i should be more specific in the use, to get more tailored feedback;

I have a couple of cordless tools (drill, saw, sawzall) that run on a 18v battery pack. My packs are all dead, or don't hold a charge at all. Obviously, I could just go get a new battery (which i will soon), but in the meantime, I was thinking it would be cool to be able to directly plug in the tools and use them as corded power tools. So the unit i would build would essentially be a 'fake battery'.

That being said, huge heat sinks or fans would be a bit bulky (but could be accomodated for, if neccessary). I will plan on having an external transformer, but not built onto the unit - perhaps in line with the cord.

Thanks all who have responded; I will look into those options.