need automotive DC-DC converter with multiple outputs 1

[geekEE]

Anyone have a source suggestion for an off-the-shelf DC-DC converter for an automotive test environment that can take in the "12V" input (probably more like 11V-14.4V and with appropriate load-dump protection) and output +15V (1.8A), -15V (100mA), and +7V (100mA)? It would be nice if it had a "power good" output signal as well. Or, if you know a supply that will at least do the +15 and -15, then I can use a separate regulator to derive the +7.

Thanks in advance

 

[sreid]

You might consider using a 12 V to 120 VAC Marine Inverter to power 120 VAC in, +/- 15 VDC out Power Supplies.

 

[itsmoked]

That is a good idea. Anything else is a much bigger hassle. It would be crazy for a product but since this is only a test system. Good idea.

Keith Cress
kcress -

http://www.flaminsystems.com

 

[sreid]

This is a 15 V, 2 A power supply I am using.

http://eshop.phoenixcontact.com/pho...UID=852324138&parentUID=null&reloadFrame=true

 

[geekEE]

Well, I'll have to find out if the inverter will fit into the space that they've allowed for the power supply of this system. I know that they'd prefer it to be smaller, but I certainly like the fact that I can find a lot more bricks that buck mains down to 15V than I can find ones that boost 12V up to 15V.

sreid, is there some reason that you specifically said to use a Marine inverter?

 

[sreid]

I said Marine Inverter very quickly because it was the first thing that came to mind. I think most of those are 24 VDC in. Perhaps an RV Inverter would be a better choice. Search for "West Marine" and look for inverters to find the names of inverter manufacturers.

 

[LionelHutz]

Can't you use a couple of "brick" DC-DC converters? I would think a 15V, 30W and a 15V, 3W would work. Make sure they are isolated and connect the positive of the small one to the negative of the large one to get the +/-15V.

Then, just add some components to the front end to protect them from the automotive electrical system.

7V is likely not possible to find because it is an odd voltage so you'd have to make it.

ETA-USA is one company I have used in the past. There are lots of them out there.

 

[kf2hi]

Check out:

http://www.bgmicro.com/index.asp?PageAction=VIEWPROD&ProdID=12297

http://gamma.octopart.com/Cincon__EC6C06(ROHS).pdf

I think you could parallel two of them to get 2 amps. According to the datasheet you can trim the voltage 10%. That's enough so you can put schottkys on the outputs and trim away the voltage drop.
Might be more economical than using an inverter.