The YiHi SX350 35W Chip at Varitube

[Kevinn]

Hi Kevinn, it was just curiosity. I wanted to know if it can behave as a true mechanical mod in by-pass mode. Just tried to know all of the possibilities of this chip. That's all, my friend. By the way, if the chip has this by-pass mode, that's because this feature should be useful for someone, shouldn't it?

Makes sense. Sorry if I sounded rude. There's a user on this forum named bapgood. He has a 6400mAh 90a continous lipo battery in his custom SX350 mod. He should be able to tell you how bypass mode compares to a mechanical mod. I'm curious as well. But I'm pretty sure stacked batteries won't operate the chip at all.

@bapgood How well does your 90a lipo SX350 compare to mechanical mods when sub ohming to the point where it pulls well over 35w from the battery?

 

[Steamer861]

I was planing on using 2 1200 mAh lipo batteries connected together in a hammond 1590a is that going to be a problem?
Do I need to use a single cell?

Question 1 - Yes Link works fine after initial update including the 40W

Question 2 - Both 40W and eventually 50W will use a single 18650....note the input voltage on the specs always....this board is for single cells...so yes battery life will begin to be an issue if you cloud chase full time But its not a big issue with replaceable batts or if you're around a PC all day just plug it and let it charge...while not pass-though you can vape it while its charging. Or find a honking lipo that will fit in your box

And thank you and you're welcome for the 510's!

 

[joanquro]

Makes sense. Sorry if I sounded rude. There's a user on this forum named bapgood. He has a 6400mAh 90a continous lipo battery in his custom SX350 mod. He should be able to tell you how bypass mode compares to a mechanical mod. I'm curious as well. But I'm pretty sure parallel batteries won't operate the chip at all.

@bapgood How well does your 90a lipo SX350 compare to mechanical mods when sub ohming to the point where it pulls well over 35w from the battery?

Don't worry. I was just trying to get a comprehensive knowledge about the chip. By the way, when you write this: " I'm pretty sure parallel batteries won't operate the chip at all", you mean series, don't you?.

I suppose that although using batteries in series is not possible, it is possible using batteries in parallel because voltage remains under the voltage limitation (amperage would be in that case halved).

 

[Kevinn]

I was planing on using 2 1200 mAh lipo batteries connected together in a hammond 1590a is that going to be a problem?
Do I need to use a single cell?

I don't have any experience with dual lipos, but make sure the C rating (continues amp discharge) is above 20 if you're planning to update your chip to 40w. In my opinion, You're better off using a VTC5 battery (30 amp, 2600 mAh) for better battery life, especially above 20 watts. I used the Keystone 1042 battery holder for my VTC5 in my Hammond 1590a box. It just needed a bit of trimming with a dremel to fit perfectly. I can carry spare batteries around if I'm away from a charger for a length of time.

Since you'll be wiring in parallel, each cell should have at least a 10c rating or higher.

If your lipos have too low of a C rating you'll see some serious voltage drop at higher watts, and the chip may throw a "check battery" message.

 

[Kevinn]

Don't worry. I was just trying to get a comprehensive knowledge about the chip. By the way, when you write this: " I'm pretty sure parallel batteries won't operate the chip at all", you mean series, don't you?.

I suppose that although using batteries in series is not possible, it is possible using batteries in parallel because voltage remains under the voltage limitation (amperage would be in that case halved).

Yeah I meant series, fixed the post. Parallel batteries are same voltage, double capacity and output

 

[joanquro]

Yeah I meant series, fixed the post. Parallel batteries are same voltage, double capacity and output

Sorry, I said amperage halved, but I was wrong. I mean, with two batteries in parallel, as you say, voltage is the same, but capacity doubles. If capacity doubles, does current double too?. For a resistance of 1 ohm and a voltage of 4.2v, the current in single battery configuration would be 4.2A. But in parallel battery configuration the current would be 8.4A. Is this ok?

Thanks.

 

[Kevinn]

Sorry, I said amperage halved, but I was wrong. I mean, with two batteries in parallel, as you say, voltage is the same, but capacity doubles. If capacity doubles, does current double too?. For a resistance of 1 ohm and a voltage of 4.2v, the current in single battery configuration would be 4.2A. But in parallel battery configuration the current would be 8.4A. Is this ok?

Thanks.

Batteries in series pushes double the current using the same ohm coil, but is more dangerous. Batteries in parallel push the same current to say a 1.8ohm coil as a single battery at 1.8 ohms. With parallel 30a VTC5 batteries, for instance, you now have 60a. You can sub ohm to under 0.1 ohms in a mechanical.

With parallel batteries, you need to build lower ohm coils, or use a chip to regulate output if you want more power

 

[Jeffp305]

I was planing on using 2 1200 mAh lipo batteries connected together in a hammond 1590a is that going to be a problem?
Do I need to use a single cell?

The two 1200mah lipos will work fine, I am currently running the same setup. Just make sure they have a high enough c rating like was previously stated. And they need to be wired in parallel!
Here is a pic of my mod with dual lipos 2400mah total

Sent from my iPhone using Tapatalk

 

[Onedesign1]

hey guys with the Bypass mode discussion. Remember the chip can only run off 4.5V max....3.7 nominal.....thats a single cell. You cannot stack cells in series. doesn't matter Lipo, IMR, etc. In bypass it acts like a mech .... direct battery to atty but through the board...so it provides the voltages and drops for you.. But its going to limit anything to 15A as the board limit....to the best of my knowledge. But still the same single cell limit.

What we don't know is what kind of losses we get through the board vs a quality mech...it certainly doesn't seem like it could be as efficient as a quality mech. But people smarter than me can probably provide some good analysis on that.

Then again its intended for providing regulated power and the Bypass is an additional feature of the board.

 

[bapgood]

@bapgood How well does your 90a lipo SX350 compare to mechanical mods when sub ohming to the point where it pulls well over 35w from the battery?

hey guys with the Bypass mode discussion. Remember the chip can only run off 4.5V max....3.7 nominal.....thats a single cell. You cannot stack cells in series. doesn't matter Lipo, IMR, etc. In bypass it acts like a mech .... direct battery to atty but through the board...so it provides the voltages and drops for you.. But its going to limit anything to 15A as the board limit....to the best of my knowledge. But still the same single cell limit.

What we don't know is what kind of losses we get through the board vs a quality mech...it certainly doesn't seem like it could be as efficient as a quality mech. But people smarter than me can probably provide some good analysis on that.

Then again its intended for providing regulated power and the Bypass is an additional feature of the board.

I haven't had time to test this specifically but I believe Onedesign1 is absolutely correct, that you will ultimately be governed by the 15a limit.

 

[Onedesign1]

Another of my customers Mods....I'm sure this thing is over other places but he is not a member here. Check this out!



More pics can be seen here Coca-Cola Retro Style Collectible SX350 Mod - Imgur

 

[Kevinn]

I haven't had time to test this specifically but I believe Onedesign1 is absolutely correct, that you will ultimately be governed by the 15a limit.

Guess I'll have to dig out my multimeter sometime. But 15 amps is still 42 watts at 2.8v (chip low batt cutoff) all the way up to 67 watts at 4.5v (max input) on this chip depending on the battery charge and Ohm of your coil.

However, I have built coils in my dripper that pull over 200 watts from my Sony 50a 26650. So I think it's safe to say, don't get rid of your mechanical mods quite yet

 

[Kevinn]

Another of my customers Mods....I'm sure this thing is over other places but he is not a member here. Check this out!

View attachment 350136

More pics can be seen here Coca-Cola Retro Style Collectible SX350 Mod - Imgur

Wow, awesome mod...

 

[Onedesign1]

We have another product update folks!:

The bad news is there will NOT be a 40W upgrade release!..........

But the good news is they've decided to just go straight 50W !!!



I have the 40W file if anybody wants it now.

50W official release will be next week.

 

[kurtus]

We have another product update folks!:

The bad news is there will NOT be a 40W upgrade release!..........

But the good news is they've decided to just go straight 50W !!!

View attachment 350152

I have the 40W file if anybody wants it now.

50W official release will be next week.

Thats saweeeet news buddy I'm gonna shoot you a pm now for the 40w firmware.

On another note, has anyone seen this yet YiHiEcigar SX330 V3 100W Want and would like a price if possible Onedesign1. Thx

 

[Steamer861]

50 Watts Awesome!! It will be nice to have all that power but I don't vape above 25 Watts The lipos I am going to use are 25C I will connect them in Parallel ( red to red Black to Black) I was going to use a single VTC5 But I'm finding with a single VTC5 in my other home made mods I can go all day So I'm hoping the 2 lipos together will all so last all day and that good enough for me Worst case senario I have 12 volt out lets in my work place Thanks for clarifying that for me

 

[Onedesign1]

Thats saweeeet news buddy I'm gonna shoot you a pm now for the 40w firmware.

On another note, has anyone seen this yet YiHiEcigar SX330 V3 100W Want and would like a price if possible Onedesign1. Thx

I have been contemplating posting this information here but since I've been asked I want to provide some clarity.

You may have or will see 35W, 50W and eventually 100W Chinese mods hitting the market with low prices from Pioneer and Sigelei. The deal is that these are license only to those 2 companies and are all based on the SX330 chip and NOT the SX350.

The SX350 is for us....modders and is a 2nd generation chip. The SX330 is a Gen 1 and the major difference is the regulation down below the battery voltage. The SX330 is like all the DNA clones and will not output power when less than the battery voltage is required. There are some other fundamental things as well that I will list here in a moment. The main point is I do not want people to feel that this great chip we are using is being devalued by being thrown into chinese mods. Its not because (1) its a different chip and (2) we all know the build quality is the difference between a chinese mod and a custom mod.

But here's some specific differences:

1. SX330 is the 1st generation Chip

2. SX330 can not step down, when you use 0.3 or 0.5 ohm atomizer, the real output power is above 25W

e.g When the voltage of Battery is 3.5V 3.5V X 3.5V/0.3ohm = 41W 3.5V X 3.5V/0.5 ohm =25W

although they advertise 7-50W they can't really go down to 7W and this is the disadvantage of all 1st generation chips.

3. Only up/down button adjustment, there is no Gravity. SX350 has both available

4. SX330 no "Bypass" feature

5. SX330 cannot upgrade.

6. If there are bugs or other problems they can be solved through upgrades. SX330 does not upgrade.

Now....as for 100W SX350. Yes its coming. but it will not be a DIY chip for resale....at least at this point. They want it in high end mods so will drive volume requirements to legit businesses only. This I will have a sample of but will only be able to show it off here. If there are any serious volume modders you are welcome to contact me at sales@varitube.com and as I learn more we can discuss it.

It'll be a 2 battery board, same size, may have some cool new features as well...more to come on that one.


As always I try to pass on timely and accurate information and hope its viewed in that light!

 

[bunnomatic]

is the 40 watt file on your website or do you need a pm?

 

[chris85e]

is the 40 watt file on your website or do you need a pm?

Pm him with ur request n give him ur email address for him to email the link

Sent from my LG-D838 using Xparent BlueTapatalk 2

 

[DFireOnly]

Upgrade worked. No issues. Battery was too low to test. Sony vtc5 Charging now. Will post in the morning after playing with it.


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