5v regulator
- Thread starter hittman
- Start date
- th_trl_thread_readers 0
- Status
I assume Texas Instruments | Semiconductors | Power Supply and Control | Linear Regulators | LDO (Low Dropout) Positive & Negative Voltage Regulators |UCC383TDKTTT-5 is the correct TI component? It has four contacts so I assume one is simply for mounting?
I've just done a search through CPC-farnell and they have nothing that comes close to the specifications in one package.
I've just done a search through CPC-farnell and they have nothing that comes close to the specifications in one package.
Oh sorry, I didn't even bother checking what the dropout voltage was.
Why would you want to limit to 1.0a? On an 801 at 3.5 ohms you would limit the voltage to 3.5v. It defeats the purpose of a higher voltage mod.
I use UCC283T-5 (T220 package) so there are only 3 connects, Vin, Vout, and ground. There are 8 versions that all have the same specs though so it really doesn't matter which of them you use.
Googled, how would you like to skip all of this linear regulator, 2 battery nonsense and go with a single battery dc-dc boost setup? Less power wasted, and you save space by only needing one battery.
If you don't mind waiting a week for it to reach you, I will send you a DC-DC converter that will output a regulated 5v with just a single lithium cell.
I just slapped this together and tried it with a cheap atomizer. Killer vaper output!!!!!
I was actually planning my own mod with this one, but you can have it. I have a few more anyway.
(please don't flood my inbox with requests for one of these, my generosity is selective)
The linear regulator in the pic is for size reference only.
If you don't mind waiting a week for it to reach you, I will send you a DC-DC converter that will output a regulated 5v with just a single lithium cell.
I just slapped this together and tried it with a cheap atomizer. Killer vaper output!!!!!
I was actually planning my own mod with this one, but you can have it. I have a few more anyway.
(please don't flood my inbox with requests for one of these, my generosity is selective)
The linear regulator in the pic is for size reference only.
Attachments
Last edited:
Using a DC-DC boost will reduce your current from a lithium bat to typically well under 1amp. Which chip are you using?
From a buck conveter yes, but this is a boost converter so the current draw from the battery will be higher since the output voltage is higher than the input voltage.
I would suggest using something bigger than a CR123.
The converter in the pic is a PTN04050C.
The stats on that converter are almost tailor made for ecigs. No resistor results in 5.0v which is perfect. The only downside I could see was the length of 23mm. Depending on the mod you could possibly squeeze it in lengthwise (unless you're building a box, then it shouldn't be an issue).
Nice find.
I tacked on some 100uF input and output capacitors, but they may not even be needed. I will have to test one without them.
It really doesn't matter how much output ripple there is since it's only powering a heating coil.
It really doesn't matter how much output ripple there is since it's only powering a heating coil.
Thank you for your very kind offer but I suspect it would be wasted on me. I'm trying to put together a 5v magnum type(yes the regulator is going to be a squeeze
) mod with good battery life so I can cheaply make them for friends and family, some who haven't started vaping but have shown an interest or intent. I'm going to order some of the VR's you mentioned in your first post (http://www.maplin.co.uk/Module.aspx?ModuleNo=46321) from Maplins since they're so cheap they're worth a try, then if I have to it'll have to be the more expensive RS supplied components.I am really impressed by the dc>dc booster tho' and I suspect you will get a lot of interest since the nicostik design can usually only accommodate one cell.
Last edited:
You can still have it if you want it. I even found a UCC383T-5 in my parts bin I could send you as well; I'll look and see if I have any more of them.
Last edited:
There are better ways to squeeze more juice out of 3.7 Li-on batteries... In my Mod I used a Pololu Adjustable Boost Regulator 4-25V that is adjusted to output 7.5v !!!!
The battery I use is a standard Nokia cell phone at 700mAh at 3.7v
My project (without these new changes yet) is here: http://www.e-cigarette-forum.com/forum/modders-forum/34050-do-yourself-mirage-e-cig-battery-mod.html
Nether less to say the vapor production is now double than before and the kick is really strong!! I'd have to make a video of it!!!!
Have fun!!! And keep vaping!!!
Thanos
Last edited:
Thanks for the part number. Went to TI and they have free samples
So I ordered some Going to try it with an 18650 battery in a box mod and see how it works.Burnie
Errrrmm..... the PTN04050C is adjustable with the addition of a resistor; It's capable of +15V output.
Did I mention it was also free?
Also, the higher you adjust the output voltage with these boost regulators, the less current is available.
This is a quote from pololu site for your boost converter.....
So assuming your atomizer is around ~3.5R, then it will be trying to draw 2.14A out of your regulator with it set at 7.5V. Sorry not possible, and the efficiency is probably horrible at that load.
Last edited:
Thanos,
Very interesting!
I hope you can report later on how long the battery will last before you need to recharge and the performance of your atomizer.
Are your components not getting too hot?
The voltage you set it up to (7v +) has turned out dead atomizer results every time anyone has tried in this forum.
^^^^
Very interesting!
I hope you can report later on how long the battery will last before you need to recharge and the performance of your atomizer.
Are your components not getting too hot?
The voltage you set it up to (7v +) has turned out dead atomizer results every time anyone has tried in this forum.
^^^^
And I suspect the only reason his atomizer is still alive is because of the limited current output (<800mA) of his boost converter. If it was truely capable of 7.5V @ >2A, the atomizer would not last long.
I suggest he lower the voltage closer to 5V, as 7.5V is just pointless with that boost converter.
- Status
Similar threads
