Electronics > Projects, Designs, and Technical Stuff
Good cheap way to get rock solid 12V DC output?
(1/8) > >>
SpannersToSparks:
Hi

Long story short, I have a piece of kit (lets just call it an SoC) that absolutely requires stable DC voltage. It can operate anywhere between 5-19.5V, but it has to be rock solid. This is gets from its wall-plugged power brick, but I need to run it off battery. So dc/dc voltage regulators cropped up, and I found this beast on amazon:

https://www.amazon.co.uk/Cocar-Stabilizer-Protector-Regulator-DC10-36V-12V-4A/dp/B06Y52C65W/ref=sr_1_9?ie=UTF8&qid=1543269878&sr=8-9&keywords=dc+dc+regulator

I want to power it with a 3s lipo (11.1V). The blurb says it will take anything from 10v to 32V and give back a steady 12V, so would this do the job, or are there more things to be looked at first? Is there anything else I would need or can I just string together my lipo and then on to the regulator and a dc barrel jack?

Cheers!
langwadt:
if it can run on 5-19.5V why do you you need a "rock solid" 12V? why not the ~11V battery directly ?
SpannersToSparks:
Because it is highly sensitive to fluctuation, even though it has a wide operating range. It has a lot of expensive sensitive components I guess.

You are not alone in asking that question, but the manufacturer assures me stability is paramount, even if they seem to be singularly unwilling to advise me how to achieve that (liability I guess)  : (
Marco:
It almost certainly still has quite a large ripple, they just mean they protect against some of the wild surges you'll see in automotive.

Just use a linear regulator and drop voltage to 10V.
Richard Crowley:
I must agree that the phrases "anywhere between 5-19.5V," and "but it has to be rock solid." seem completely contradictory and antithetical.

I have very strong questions about "has to be rock solid" For one thing "rock solid" seems like a pretty flaky subjective term. Does "rock solid" mean that it has poor noise rejection".  If so, WHY?  OTOH, a battery source slowly drooping from 11.5 to 9.5V should not be of any significant concern to something that claims to be able to operate with "5~19.5V"

And if this mystery gadget really needs such "rock solid" power, I would be searching for an alternative that was better suited for the Real World.  Of course if we knew what the mystery gadget was, we might be able to better understand what they may have MEANT (vs. what they actually SAID).
Navigation
Message Index
Next page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod