Electrician Talk banner

1 - 5 of 5 Posts

·
Registered
Joined
·
1 Posts
Discussion Starter #1
I'm creating a UPS due to the fact there are non on the market that are small enough for our needed application. The final piece of the puzzle is integrating a voltage regulator, but not sure if it will drop 16v to 12v, as well as allow 12v to 12v when it switches to and from the batter.

Current setup:

16v Power brick into picoUPS-100 12v DC (board requires 16v to charge battery)
12v Lead Acid Battery into picoUPS-100 12v DC (Needed to power PC when power is lost)
Need Constant 12v to Load (PC)


If I put a voltage regulator it will drop the constant power from 16v down to 12v. Will that still allow the load to run off of the battery if the power is lost since it will only be 12v to the load. I'm not sure how voltage regulators work, if it regulates down to 12v and allows a pass through if its 12 going into it.

Thank you!
 

·
Registered
Joined
·
847 Posts
A 12v voltage regulator will provide 12v out up to a maximum voltage, but it wont increase the input voltage.

If you put 12v in, you will get 12v out.
If you put 20v in, you will get 12v out.
If you put 10v in, you will get 10v out.
 

·
Registered
Joined
·
2,969 Posts
16v in 12v out
no problems !

12v in and 12v out
Maybe ?
some regulators will have some thru loss
you will have to try it and see

:thumbsup:
 

·
Registered
Joined
·
268 Posts
Rule of thumb

I was taught that regulator input should be at least 3V higher than desired output. Don't remember why, just always did it and used it in troubleshooting.

Probably came from a "under specify but over preform" mentality.
 

·
Registered
Joined
·
2,969 Posts
3 volts sounds about right for a standard linear series pass regulator !
But the o/p is talking about a switching regulator,
Which should have less !
 
1 - 5 of 5 Posts
Top