power supply mode for DNA 75/60

[lewisss]

Now I know there is not an option on escribe to set battery as a power supply.
but is there any way to use this chip as a passthrough , with a plug in power supply.
quite happy to solder,/make up circuit
for this

thanks in advance

[VapingBad]

I would think just connecting a DC 4.2 V > 32 A PSU to the board battery connections, IIRC the 200/250 mode is to bypass monitoring the balance connections.

[Bendude]

Heyo,

What's up 5 year old thread, anybody ever try this? also feel like this should work... but it was pretty hard to find this puppy, would love to hear results.

[Bendude]

...hour of googling later

ho boy... ok i think i get it, 4.2 volt 30 amp power supply is hard to come by... I think I might have an option, it puts out a set of voltage options: 3.3V, 5V, 9V... Data sheet on the DNA say min input is 3.0V, max 4.2V, the slider in Escribe goes up to 4.5V...... can't imagine I'd be getting much work done at 3.3, 5 seems a little high lol. Would a comfortable target for a constant power supply be around 80% capacity batteries, like 4V maybe? or right on the max charge battery at 4.2V?

Any advice would be appreciated, going for a chill little desktop setup, freaking tired of batteries 

Edited June 13, 2021 by Bendude

[dwcraig1]

If I was making something of that nature I would put a couple 21700's wired in parallel  inside a box with a small charger.

[BillW50]

I see nothing wrong with 3.3v @ 30A if you wanted to go that route. Both the DNA60/75 would run perfectly fine. What size cables to use depends on the length of cables you wanted.

I believe both the DNA60 and 75 you could configure for no USB charging. Since trying to charge a DC supply would be pointless anyway.

Edited June 13, 2021 by BillW50

[Wayneo]

8 hours ago, Bendude said:

Any advice would be appreciated, going for a chill little desktop setup, freaking tired of batteries

You'll only be swapping out portability for cables and cables. Yup, at least 2.

Edit: On the 75 there's a 'this mod uses an external charger' option I don't remember being there. That disables charging via USB. But it shows the lightning bolt when connected.

[Bendude]

Thanks All for the input.

Just in case anyone finds themselves reading this on the same or related google journey, this should get the job done: https://www.mouser.com/ProductDetail/mean-well/lrs-200-42/?qs=ah3jBNVE1PTuWW3yE9MLsQ%3D%3D&countrycode=US&currencycode=USD its just massive and actively cooled 👎

Your right, I'm sure batteries would decrease the footprint\cost of getting this power profile, my initial goal for this project is basically to eliminate the long term management of batteries... so, its impractical but that's my goal.

Also definitely right about the cables... this is going to be the other main thing I'm going to try and design for best I can. Best case so far looks like something like this https://www.amazon.com/NOYITO-AC-DC-100-260V-Industrial/dp/B07C2MMKW3/ref=sr_1_11?dchild=1&keywords=12V%2Bpower%2Bsupply%2B8A&qid=1623609801&sr=8-11&th=1 combined with a little high efficiency voltage regulator chip my dad of all people is telling me he has some samples of and should get that 12v down to 4.2V at 30A. Its very small (2cmx2cm package on a pcb w/ pads to solder to) so I think I can get something resembling "one cable" with these solutions. Will definitely report back if successful. If you don't hear from me its probably just because the procrastination beast got me not because I electrocuted myself hopefully   shipping on all this is gonna be a couple weeks

Thanks again everybody for the input, answered multiple questions. Still wondering if anybody has any experience with what the most comfortable voltage to run the DNA75C hardware at if you had your pick of a constant supply? My guess is max in spec (4.2V) to minimize amperage on the wires but I'm sure I could be missing something. Was surprised to hear you think 3.3 should be fine, I've definitely experienced slow pickup as my batteries die but I'm guessing with a constant supply if the amps are there then its equivalent power *shrug

[Wayneo]

@Bendude For a few dollars more you might want to use the 250C board which is buck only, no boost like the 75C and has the passthrough capability natively. You should check out http://analogboxmods.ca/Box-Mod-Kits who has complete kits and videos of builds

Xbox PSU "Vapestation" Build - https://youtu.be/RoKaZ_iHiX0
DIY 636W 4x12v Output "VapeStation" Build - https://youtu.be/0K1PaMRnhsA
DNA 200/250 DIY Box Mod (Passthrough) Build - https://youtu.be/NwDIzz7SxFg