DNA 200 Watt

[Darkly spectr]

LiFes are a very safe technology, so that's not an issue at all. And they can support a high discharge rate also. The issue for them is the full charge voltage is only 3.6v/cell (LiPos are 4.2v/cell). So if the DNA200 uses a conservative low voltage cutoff of 3.2v (I'm not sure what the LVC for the DNA200 is) it might not be able to use all it's available power. It is common to have a cutoff or 3.1 or 3.2v, so that really is going to be an important factor for how well LiFes do with this chip. Couple the LVC with the discharge curve of a LiFe cell, which starts out at 3.6v and drops pretty quickly to 3.2v where it stays for most of it's usable charge life and I'm just not sure it's going to perform well.

It's yet to be seen what the LVC of the DNA200 is, and that is probably the biggest concern I have with LiFe batteries with this chip. Maybe someone can chime that knows what the cutoff will be, and if it's settable in the software. LVC being settable to take advantage of LiFe battery technology, that differs quite a bit from LiPos, will be the deciding factor in how this battery tech will work I think. LiFes are designed to spend most of their time at 3.2v during a discharge cycle, so it's important the DNA200 can take advantage of this for LiFes to be viable. And even if the LVC cutoff is 3.1v, a nominal voltage of 3.2v on LiFes is going to trigger a LVC on the chip with normal voltage sag if vaping at high wattage, even though the LiFe pack is operating normally and within spec.

Just too early to say without knowing the complete specs of the DNA200, and seeing how much voltage drop occurs on a LiFe pack at high wattage vaping. I wouldn't be concerned at all about the LiFe pack being capable of doing the job, I just don't know If the DNA200 is smart enough to be able to use this different battery tech properly or if it just treats a LiFe pack as a LiPo pack... which would not be ideal.

Well in a way I guess with the escribe maybe there is a way to set a different voltage cut-off depending on battery?

well stealthvape shipped out my box and chip already.

 

[mikepetro]

Well in a way I guess with the escribe maybe there is a way to set a different voltage cut-off depending on battery?

Yes, it is selectable, and the LVC etc change based on selection of LIPO, LiFe PO4, or Power Supply.

 

[Darkly spectr]

I just hope that somebody designs up a chip sled/holder for the DNA 200. would make things alot easier to mount.

I just hope escribe is easy to work with

but im excited chip itself should be here on wednesday.

 

[Tpat591]

I just hope that somebody designs up a chip sled/holder for the DNA 200. would make things alot easier to mount.

I just hope escribe is easy to work with

but im excited chip itself should be here on wednesday.

Go to shapeways.com & you will find a few.

Dna200 - Shapeways 3D Printing Search Results

 

[Troll from behind]

Oh my, you can go up to 50 watts with .04 build!!
What the heck is the frothing about "legit" 200 watts, don't we have chips that can go there (and above) with higher resistances?
For me the "legit" would be something, that can go up to promised through the entire resistance scale.


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[Shogun1024]

Oh my, you can go up to 50 watts with .4 build!!
What the heck is the frothing about "legit" 200 watts, don't we have chips that can go there (and above) with higher resistances?
For me the "legit" would be something, that can go up to promised through the entire resistance scale.


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Um..... Believe that is 50 watts at 0.04

 

[RickCain]

Um..... Believe that is 50 watts at 0.04

Correct, .04 ohms

I can't wait to learn about the hybrid builds.


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[Shogun1024]

Correct, .04 ohms

I can't wait to learn about the hybrid builds.


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I'm running a hybrid 28ga Titanium/Kanthal twisted with 38ga Clapton right now. Using the SXK vapor flask the TC is working great, BUT the possibilities are virtually endless come the DNA200. So excited personally and I haven't had an Evolv chip since the Darwin

 

[KTMRider]

Yes, it is selectable, and the LVC etc change based on selection of LIPO, LiFe PO4, or Power Supply.

Welcome back to the thread.

 

[Sptz]

I'm running a hybrid 28ga Titanium/Kanthal twisted with 38ga Clapton right now. Using the SXK vapor flask the TC is working great, BUT the possibilities are virtually endless come the DNA200. So excited personally and I haven't had an Evolv chip since the Darwin

Why would that be? Why would the DNA200 offer more options for hybrid builds than a sx350j or dna40? More so the 350j after the Ti FW update.

 

[USMCotaku]

Just insanity. Being able to preset builds is going to be amazing.

The only downside is that it doesn't utilize pwm. /s

How is that a downside? Most new regulated mods have opted to use dc-dc over pwm for a reason

 

[VapingBad]

Why would that be? Why would the DNA200 offer more options for hybrid builds than a sx350j or dna40? More so the 350j after the Ti FW update.

You can load your own TCR curves for any wire, SteamEngine have a beta page for them to. And temperature controlled pre heat which the YiHi doesn't have will make a big difference for more mass-ive coils.

 

[Shogun1024]

You can load your own TCR curves for any wire, SteamEngine have a beta page for them to. And temperature controlled pre heat which the YiHi doesn't have will make a big difference for more mass-ive coils.

MASSIVE difference really as the SXK mod with Nickel Purity can barely adjust to the coil I posted for TC and guessing the Diocedes can too since I don't have one but with 20% resistivity compared to plain Titanium being able to program your own TCR curves WILL be the next big thing ESPECIALLY with hybrid "heavy metal" builds

 

[BlueridgeDog]

I just hope that somebody designs up a chip sled/holder for the DNA 200

I have done a few, about as far as I can without the chip in hand...should have one soon. The sled design I have has been printed and I will know if it is a success shortly. My only concern at this point is window alignment and button depth.

 

[Darkly spectr]

I have done a few, about as far as I can without the chip in hand...should have one soon. The sled design I have has been printed and I will know if it is a success shortly. My only concern at this point is window alignment and button depth.

yeah buttons and such are all no issues. I just have no idea how to get the DNA screen solid set in that hammond box. Also. not sure how I feel about the USB being onboard and not a seperate board you could move around like the DNA40. but eh I will see when I get everything together.

 

[Jazzman]

By default, the LiFe PO4 soft LVC is 2.84v, I am not sure what the Hard LVC is but it will be somewhat less.

ETA, the soft limit is configurable, albeit I am sure it limited by the HARD LVC.

That LVC makes LiFeP04 battery tech very usable with the DNA200D. Thanks for the info Mike. Every time I hear more of the little details about this board I get more excited about getting mine! This certainly seems like a really well thought out board. I hope they added drool proofing to the board so I don't ruin mine before I get the mod built

 

[SavePaperVapor]

How is that a downside? Most new regulated mods have opted to use dc-dc over pwm for a reason

How is that a downside? Most new regulated mods have opted to use dc-dc over pwm for a reason

you missed the /s.

 

[suspectK]

I agree. I wouldn't run 16v either. But in reference to a 4cell LiFe at 14.4 it should be fine.

Why isn't that in the spec sheet?

 

[AlaskaVaper]

Fabulous Rip- I can hardly wait.

 

[windxrunner]

I don't think LiFe's are going to be a good choice for the DNA200D unless you use a 4 cell pack. And even then, high amp draw is not a good fit for this battery tech I think. If only using between 20 and 40watts they will probably do OK, but LiPo's will do a much better job I would think. A lot depends on where the DNA200 has the low voltage cutoff (LVC) set (or if it's settable). If the LVC can be set to 3.0 or 2.9 LiFe's may not be too terrible, but if the LVC is 3.2 they won't do well at all.

You wouldn't be able to use a 4 cell LiFePO4,,,the DNA 200 has a 3 cell balancing charger. Not 1s, 2s, 4s, etc. Only 3s will work.

EDIT: So basically, if you want to use LiFePO4 cells, you're going to have to deal with a low battery warning constantly and terrible battery life. LiFePO4 cells do have a very flat discharge curve, but they do drop down to 3.3 (or 9.9 for our uses) pretty quick, where they stay for a while before going down below that. So you really wouldn't get the full mAh out of your LiFeP04 unless you could somehow tell the board that it is indeed a pack with lower operating voltage so it would know not to cut off until a lower voltage.