Running a 12V computer from the automative electical system

Thread Starter

alloverio

Joined Jan 3, 2018
3
I am looking at traveling and I need to run a small fanless computer on board. I am looking at this ...

http://www.qotom.net/goods-126-Q180S++Q190S+(S02)+Bay+Trail+Mini+PC.html

These unites are 12V, 10W average, but I think they burst up to 30W. Their power supplies are rated 12V 4A.

What options do I have and what might be the best option to provide a regulated 12V, 4A power output from the variable automotive electrical system?

Thank you.
 

ian field

Joined Oct 27, 2012
6,539
I am looking at traveling and I need to run a small fanless computer on board. I am looking at this ...

http://www.qotom.net/goods-126-Q180S++Q190S+(S02)+Bay+Trail+Mini+PC.html

These unites are 12V, 10W average, but I think they burst up to 30W. Their power supplies are rated 12V 4A.

What options do I have and what might be the best option to provide a regulated 12V, 4A power output from the variable automotive electrical system?

Thank you.
The automotive electrical environment can be a bit noisy - spikes as high as 68V aren't all that unlikely.

The battery could sink as low as about 11V - the alternator will try to get it up to about 14.4V, but over voltage faults aren't totally rare.

The text book route is a buck/boost converter - and you need to protect that from the spikes.

Converting up to mains voltage and using a regular PSU block is probably the safest option, but it wastes more energy.
 
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