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AMDtrucking

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According to Evolv's DNA250 datasheet, DNA250 output is limited to 9.3 Volts and 53 Amps.
What are these limitations be, If I'm using it with two cell, 167 Watt configuration?
Thank you.
ChunkyButt200

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Reply with quote  #2 
6.2v 53 amps (obviously you can't push 6.2v and 53 amps at the same time that would be over 318 watts,lol. whichever limit you reach first.)
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1.21 JIGAWATTS............GREAT SCOTT!........WHAT THE HELL IS A JIGAWATT?
• I am not employed by nor do I represent Evolv Inc.  All opinions are my own, they are just opinion not fact and can be wrong •
Latest versions of EScribe: DNA 200 • DNA 75  Common problems
EVOLV HELP DESK - https://helpdesk.evolvapor.com/?a=add
LOST VAPE WARRANTY REPAIR - http://www.lostvaperepaircenter.com
AMDtrucking

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ChunkyButt200 ,  Thank you very much and Marry Christmas!
ChunkyButt200

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AMDTrucking - i made a mistake, it's actually 6.2v (corrected first post). and MERRY CHRISTMAS TO YOU!
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1.21 JIGAWATTS............GREAT SCOTT!........WHAT THE HELL IS A JIGAWATT?
• I am not employed by nor do I represent Evolv Inc.  All opinions are my own, they are just opinion not fact and can be wrong •
Latest versions of EScribe: DNA 200 • DNA 75  Common problems
EVOLV HELP DESK - https://helpdesk.evolvapor.com/?a=add
LOST VAPE WARRANTY REPAIR - http://www.lostvaperepaircenter.com
kbriggs

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Quote:
Originally Posted by ChunkyButt200
AMDTrucking - i made a mistake, it's actually 6.2v


Is this still accurate information? Because I've seen multiple online stores like VaporDNA here:

https://www.vapordna.com/Lost-Vape-Therion-166-DNA-167-Box-Mod-p/lvt167.htm

claim that the 2-cell "DNA 167" can output 1 to 7.4 volts.  I specifically just ordered a Therion 166 because I'm tired of bumping into the 6 volt limit of my HCigar VT133.  I'm going to be really p.o.'d if I find it has the same voltage limitation. Please confirm.
dwcraig1

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Reply with quote  #6 
250 in 2 cell configuration voltage output.....6.2 volts max.
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giz_60

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Their listing is misleading..also claims 1a USB charging, when the Therion 166 has 2a
kbriggs

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Well that sucks. If you google "Therion 166 7.4v" you'll see site after site after site with that bogus number. It's probably all copy and pasted from Lost Vape.  I've got some dual clapton builds above 0.5 ohms that I like and I'll hit that stupid 6 volt limitation well before I hit the 133 watt limit. Now I get to hit it way way before the 167 watt limit. Woohoo, what a great design decision there, Evolv. Even my little single battery eVic Mini can go to 9.5 volts. [frown]
Evo1340

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Reply with quote  #9 
Wow, I don't think I've ever vaped over 5V.
kbriggs

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Quote:
Originally Posted by Evo1340
Wow, I don't think I've ever vaped over 5V.


All my clapton builds need at least 5 v.  It's rare that I go over 6 but it's ridiculous that this $80 chip cannot do it.
ChunkyButt200

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Quote:
Originally Posted by kbriggs


All my clapton builds need at least 5 v.  It's rare that I go over 6 but it's ridiculous that this $80 chip cannot do it.
it cannot do it because it's buck only no boost. it cannot go over battery voltage, as is the case with MANY other 2S (2 cells in series) configured mods. in 3S (3 cells in series) mode you will get 9.3v max output. board price does not dictate voltage output. also, the board was designed to be used with in a 3S config, starting with the DNA 200. the only reason we have the 133 and 167 option is because a couple years ago people asked for it here in this forum. people were fully aware of the output voltage limitation when in 2S mode. their workaround........build lower ohm coils.

https://evolvapor.forumchitchat.com/post/2s-18650-discussion-7521656?trail=15&highlight=2+18650


__________________
1.21 JIGAWATTS............GREAT SCOTT!........WHAT THE HELL IS A JIGAWATT?
• I am not employed by nor do I represent Evolv Inc.  All opinions are my own, they are just opinion not fact and can be wrong •
Latest versions of EScribe: DNA 200 • DNA 75  Common problems
EVOLV HELP DESK - https://helpdesk.evolvapor.com/?a=add
LOST VAPE WARRANTY REPAIR - http://www.lostvaperepaircenter.com
kbriggs

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Quote:
Originally Posted by ChunkyButt200
it cannot do it because it's buck only no boost.


Sounds like a poor design choice made on day 1.

Quote:
it cannot go over battery voltage, as is the case with MANY other 2S (2 cells in series)


What other 2S system maxes at only 6.2 volts? Why is the completely drained condition of 3.1 volts per cell (x 2) the upper limit instead of at least the nominal condition (3.7 x 2)?
ChunkyButt200

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Quote:
Originally Posted by kbriggs


Sounds like a poor design choice made on day 1.



What other 2S system maxes at only 6.2 volts? Why is the completely drained condition of 3.1 volts per cell (x 2) the upper limit instead of at least the nominal condition (3.7 x 2)?
do you own a DNA 200 or 250?

it takes a level of understanding electronics to see why it would be buck only when dealing with 11.1v battery voltage but basically you would not need to go above that voltage.

You didn't read my post correctly, but that's ok. I said many of the 2S mods are buck only, which is true. I didn't say all of them had a 6.2v limit. Most will will likely state to have a limit of 7.5v BUT that is for a very short time give the cells will quickly call from 8.4v to their nominal combined voltage of 7.4v. Evolv' s boards will give you the wattage you select until the very end cell voltage range, not for just a short time like other boards.

3.1v is the voltage at rest. There will be losses and voltage drop during the conversion, when fire button is pressed, like with any board. Under load the batt voltage could be closer to 2.8 or lower. As an 18650 approaches the 3v mark, voltage drop becomes more pronounced. Like I said, there needs to be a basic understanding of electronics before making statements like yours.

Obviously the DNA 133 or 167 is not for you. You would be better off with a 3S version of the DNA 200\250 or series mechanical.

__________________
1.21 JIGAWATTS............GREAT SCOTT!........WHAT THE HELL IS A JIGAWATT?
• I am not employed by nor do I represent Evolv Inc.  All opinions are my own, they are just opinion not fact and can be wrong •
Latest versions of EScribe: DNA 200 • DNA 75  Common problems
EVOLV HELP DESK - https://helpdesk.evolvapor.com/?a=add
LOST VAPE WARRANTY REPAIR - http://www.lostvaperepaircenter.com
kbriggs

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Reply with quote  #14 
Quote:
Originally Posted by ChunkyButt200
do you own a DNA 200 or 250?


Yes, I have a pocket-unfriendly Reuleaux DNA 200. Fortunately its 9v output is adequate. And the HCigar VT133 with the 200 chip as I mentioned. And a Lost Vape Therion 166 with the 250 chip in route to me as I write this with the falsely advertised 7.4v output from VaporDNA (and at least a dozen other vendors), which apparently no one else on the planet noticed except for me.

Quote:
Evolv' s boards will give you the wattage you select until the very end cell voltage range


Except or course it might not give you the wattage you select at all due to the low voltage output in 2-cell mode. You have to build at or below 0.23 ohms to access the full wattage range in the 167w configuration.

retird

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Reply with quote  #15 
As @ChunkyButt200 mentioned:   "The board was designed to be used with in a 3S config, starting with the DNA 200. the only reason we have the 133 and 167 option is because a couple years ago people asked for it here in this forum. people were fully aware of the output voltage limitation when in 2S mode. their workaround........build lower ohm coils."

And he mentioned:  "Obviously the DNA 133 or 167 is not for you. You would be better off with a 3S version of the DNA 200\250 or series mechanical."  

I would only add that the 133 and 167 could work for you if you should decide to build a coil that works within the parameters of the device.  All my coils work just great within the parameters of my two 200's and three 75's.......

I hope you get it sorted out to your liking.... [thumb] 






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I am not an employee of and do not represent Evolv Inc.  My opinions are just that and are not meant to be fact or even correct.

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