
Re: Newbie construction TL battery maths help required
Hi Reuben,
This from our electronics engineer:
This link should explain it in detail. Start from step one.
http://www.powerstream.com/battery-capa ... ations.htmQuiescent Current of the LM2596 is 10ma (worse case). So you need to add 10ma as a constant duration.
Also the LM2569 only switches at 73% efficiency (worse case, although from 12V to 8 it’s probably not that bad). But to be safe, once you’ve done all the maths you should take the 73% efficiency into the consideration as well. (just multiply the final Ah x 1.27)
Sorry the calculation isn’t actually that simple, I don’t have time to explain it in much more detail bit you should have enough to get started.
Matt