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Breaktru Forum  |  eCigarette Forum  |  Modding  |  Topic: .44 mini Booster Box Mod Variable Voltage
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Author Topic: .44 mini Booster Box Mod Variable Voltage  (Read 294029 times)

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Offline L18

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #150 on: December 19, 2011, 01:19:10 AM »
Hello Breaktru, you have very very nice mods here!
I just wanted to ask about this mod, that have you measured current that is drawn from the battery?
I thought that trustfire flames have a current limit at 1.5C, which on 900mAh batteries would give us max. continuous current of 1.35A? And when it is booster, it should pull more from battery than that 2.4 amps which goes to atty right? Is there something I'm missing?  :laughing2:

Great mod, it inspired me to build my own boostermod, in the past i've only made step-down mods.  :)
I'm just confused how much current can those batteries give.

If you don't understand something, just ask. I'm not sure if that text is clear, since my motherlanguage isn't english...  ;)

Offline irco

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #151 on: December 19, 2011, 08:43:44 AM »
Hi. Please where can I find the table for what resistors to fit for desired voltage output ranges. Thanks.

Online Breaktru

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #152 on: December 19, 2011, 11:57:44 AM »
Hello Breaktru, you have very very nice mods here!
I just wanted to ask about this mod, that have you measured current that is drawn from the battery?
I thought that trustfire flames have a current limit at 1.5C, which on 900mAh batteries would give us max. continuous current of 1.35A? And when it is booster, it should pull more from battery than that 2.4 amps which goes to atty right? Is there something I'm missing?  :laughing2:

Great mod, it inspired me to build my own booste rmod, in the past i've only made step-down mods.  :)
I'm just confused how much current can those batteries give.

If you don't understand something, just ask. I'm not sure if that text is clear, since my mother language isn't English...  ;)

Hi L18, Welcome to the forum.
Thank you, glad I have inspired you.  :laughing:

Yes if you do the math for "C" ratings, a 900mah should provide 1.35A. But............ if you do actual testing, it is much higher.
After reading your post, you inspired me,  :laughing2: to test a real live situation.
Now this is not gospel, this is my test. You may get different results depending on your battery. As Craig pointed out once, no two batteries are a like. At least I think that's what he said.  :laughing:

Here goes:

14500 Trustfire Black & Red, 900mah - (4.03v)
Using a 04050c set at 3.79v w/ a 2.0 ohm atty measures 2.96 amps at the battery input to regulator.

AW IMR 14500 - 600mah (4.16v)
Same setup as the Trustfire measures 2.15 amps at battery input to reg.

It looks like the Trustfire did better than the AW IMR Low Drain.
But.... the AW IMR did better with the DC-DC Converter output amperage being 0.05 amps higher than the Black & Red Trustfire.

P.S.
You English is very good.
« Last Edit: December 20, 2011, 10:01:16 AM by Breaktru Admin »

Offline L18

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #153 on: December 19, 2011, 01:09:06 PM »
Hi L18, Welcome to the forum.
Thank you, glad I have inspired you.  :laughing:

Yes if you do the math for "C" ratings, a 900mah should provide 1.35A. But............ if you do actual testing, it is much higher.
After reading your post, you inspired me,  :laughing2: to test a real live situation.
Now this is not gospel, this is my test. You may get different results depending on your battery. As Craig pointed out once, no two batteries are a like. At least I think that's what he said.  :laughing:

Here goes:

14500 Trustfire Black & Red, 900mah - (4.03v)
Using a 04050c set at 3.79v w/ a 2.0 ohm atty measures 2.96 amps at the battery input to regulator.

AW IMR 14500 - 600mah (4.16v)
Same setup as the Trustfire measures 2.15 amps at battery input to reg.

It looks like the Trustfire did better than the AW IMR Low Drain.

P.S.
You English is very good.

 :begging: Wow, those little batteries perform really well! I think maximum continuous discharge current is 1.5C, this might be the answer? Because vaping usually isn't that constant, well for some people it is but...  :laughing2:

I have couple of those batteries at home, I guess i'll have to come up with some kind of "stress test" for them to see what they can output.
But this is great news, I was struggling to find a box that I could fit 18650 batteries, but it is pretty impossible to put them on a box that would be small enough for my taste. That is of course quite obvious, because they're so big.  :)

But thanks to you, now I know that it could be possible to use those little ones, thank you for that.
And now when I found this forum, I'm quite sure I'll continue following it.  ;)

Oh yeah, I already ordered free sample from TI...  :yes"

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #154 on: December 19, 2011, 01:25:10 PM »
Your output through the 04050c will not produce that kind of amperage. With the right atty / voltage combo, your lucky to get 2.4 amps max output. Typical amperage is 1.5 to 1.9 amps.
At least that's what I have experienced.

Update:
Something I remembered on a previous output load test.
The AW IMR puts out 0.5 amps more than the Trustfire on output/load amps
« Last Edit: December 19, 2011, 02:27:54 PM by Breaktru Admin »

Offline L18

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #155 on: December 19, 2011, 02:18:48 PM »
Yes, I realized that.  :) But almost 3 amps from the battery is very good in my opinion, when we are talking about 14500 batteries.

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #156 on: December 19, 2011, 02:30:45 PM »
Yes, I realized that.  :) But almost 3 amps from the battery is very good in my opinion, when we are talking about 14500 batteries.

Sounds unbelievable but that's what I came up with on testing.

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #157 on: December 19, 2011, 05:16:06 PM »
Hi. Please where can I find the table for what resistors to fit for desired voltage output ranges. Thanks.

With the new resistors shown in my schematic diagram, I feel that the Resistor / Table is no longer needed because
the new voltage range is now something like 3.78v to 6.2v.
See posting: http://breaktru.com/smf/index.php/topic,215.msg2061.html#msg2061

Offline irco

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #158 on: December 19, 2011, 06:23:17 PM »
Thanks for that. I'm going to give it a go with 2 x 18650's in parallel for a longer lasting smile.

 :thankyou:

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #159 on: December 19, 2011, 06:56:07 PM »
Thanks for that. I'm going to give it a go with 2 x 18650's in parallel for a longer lasting smile.

 :thankyou:

Now this is only my opinion... If you are going to put 2 x 18650's in a mod, why not go with a 08100w or OKR.
I feel that the boost converter is a convenience for small mods because you only need a single battery.

Offline irco

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #160 on: December 19, 2011, 07:16:43 PM »
I know nothing about electronic gizmos but can look at a schematic and solder. An explanation and schematic would help. Now if you have an MGB needing tuned up I can understand that. Now you know. I am a mechanic.

 :wave:

Offline asnider123

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #161 on: December 19, 2011, 07:33:52 PM »
I know nothing about electronic gizmos but can look at a schematic and solder. An explanation and schematic would help. Now if you have an MGB needing tuned up I can understand that. Now you know. I am a mechanic.

 :wave:

Or make yourself a Moby Poorvari, a Moby ___ with the poorvari circuit instead of the 5v regulator. It will hold 2-18500's and vape like mad. Of course, it uses a linear, rather than switching, regulator but the price is right    LOL

Moby ___ Mod:
http://breaktru.com/smf/index.php/topic,282.msg937.html

Poorvari circuit:
http://www.e-cigarette-forum.com/forum/battery-mods/189320-my-poorvari-mod.html


Offline L18

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #162 on: December 22, 2011, 11:05:44 AM »
Ok, I received my booster today, and had to make a quick test with it.  :)
I didn't put any adjustment pot in it, so it was working on 5 volts.

There was attached CE3 Smokymizer, with was measured and it's resistance is 2.8 ohms. At atty, it kept constant 5 volts, and current was 1.66A.
From battery, under load voltage dropped from 4.15 volts to 3.6 volts, and current was about 3.6A.
Booster circuit takes pretty much power, I calculated it took 4.6 watts? Well, I think I'll try low ESR capasitors at input and output.

But anyway, I like that booster very much, and I'm happy how well those 14500 flames perform.  :)

Offline herbsman05

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #163 on: January 01, 2012, 05:11:17 AM »
whats the difference of the output with the different resistors between pin 3 and 4? thanks!!!

Offline tangocharlie

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #164 on: January 02, 2012, 09:45:04 PM »
Dear Sir,
can i replace the 100uF caps with smaller caps : 10uF 0r 22uF ?
will it effect the performance ?
Thank you very much Sir

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #165 on: January 03, 2012, 08:14:13 AM »
Follow the components DATASHEET page 10, Table 3:



Offline styl3r

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #166 on: January 06, 2012, 07:39:53 PM »
I have also made this mod with the 0405c booster and 2 x18650 so 4.2 off the charger voltage range 3.94-5.4, batteries are 3200 ultrafire. but as soon as i put an atty on it reduces the max output to 4.2v with a 2 ohm atty on and 4.4v with a 1.5ohm dual coil atty.......wierd. I am going to dismantle tomorrow as i suspect the output capacitor may be failing.
Any ideas to throw in the hat would be great....... :help:
Let you know what i find after replacing output cap....if i can take it apart without breaking anything else :(
cheers
Styl3r

Offline styl3r

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #167 on: January 06, 2012, 07:49:18 PM »
Hi nice mod what size resisters did use and trimmer to acheive that high an output i used a 20k, 10k and a 100k trimmer and i get 3.94-5.4v
cheers
Styl3r


Here's my finished 4050C. goes from 3.8v to 6.3v. huhuhu



Credit goes to breaktru for his beautiful schematics and guide!  :thankyou:

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #168 on: January 06, 2012, 08:12:04 PM »
I have also made this mod with the 0405c booster and 2 x18650 so 4.2 off the charger voltage range 3.94-5.4, batteries are 3200 ultrafire. but as soon as i put an atty on it reduces the max output to 4.2v with a 2 ohm atty on and 4.4v with a 1.5ohm dual coil atty.......wierd. I am going to dismantle tomorrow as i suspect the output capacitor may be failing.
Any ideas to throw in the hat would be great....... :help:
Let you know what i find after replacing output cap....if i can take it apart without breaking anything else :(
cheers
Styl3r

One thing I was going to mention is the battery but since you are using TWO 18650's in parallel we can eliminate a suspect battery.

Measure the 2 ohm atty and make sure it is 2 ohms.

Have you tried starting your tests from the lowest voltage output and gradually work up and record the voltage drop difference.

Another thing to look at is a cold solder connection,

Remove the caps would be the next step if no cold solder was found.

Offline styl3r

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #169 on: January 06, 2012, 08:26:16 PM »
My soldering is not the best for sure, will look at that. You posted about different resistors between pins 3 and 4 how does that work the higher the resistance between 3-4 gives higher yield ???
have you a list of what resistors give certain output
i.e
20k 5.4 max
10k ?
15k ?

Cheers Dave,
 off to bed it's 01:25 am here and i am  knackered.

Kevin aka Styl3r

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #170 on: January 06, 2012, 08:35:44 PM »
My soldering is not the best for sure, will look at that. You posted about different resistors between pins 3 and 4 how does that work the higher the resistance between 3-4 gives higher yield ???
have you a list of what resistors give certain output
i.e
20k 5.4 max
10k ?
15k ?

Cheers Dave,
 off to bed it's 01:25 am here and i am  knackered.

Kevin aka Styl3r


See post #122: http://breaktru.com/smf/index.php/topic,215.msg2061.html#msg2061

Offline styl3r

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #171 on: January 12, 2012, 12:53:07 PM »
took the unit apart and tested the 04050c with just positive and negative pins 1 &2 and tested at pin 4 and get 5v but as soon as i attach a 2 ohm load drops to 3.8v is this because there is no capacors on input and output or is the module duff?????
Have some new low esr capacitors on order so will breadboard when they arrive and test again.
Cheers
Styl3r

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #172 on: January 12, 2012, 04:00:58 PM »
took the unit apart and tested the 04050c with just positive and negative pins 1 &2 and tested at pin 4 and get 5v but as soon as i attach a 2 ohm load drops to 3.8v is this because there is no capacors on input and output or is the module duff?????
Have some new low esr capacitors on order so will breadboard when they arrive and test again.
Cheers
Styl3r

Kevin, With two 18650's in parallel, you should not see any noticeable difference in voltage drop without the caps. I've performed the same test w/ a single 14500 and seen maybe the most, a 0.2v drop.
It's possible the 04050c has been damaged.

This 2 ohm atty, have you tried a different 2 ohm atty? Somethings sounds not quite right. You're voltage drop w/ the 2 ohm is higher than w/ a 1.5 ohm.
Or it still can be the 04050c. Logical results goes out the window w/ a damaged board..

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #173 on: January 12, 2012, 04:26:16 PM »
Yeah tell me about it, i have tried a different atyy and same result they are dual coil if that makes any difference. ! and another one i have is dropping off voltage. I have just received some new boards so will be testing those tomorrow fingers crossed they will be alright. Bought some new capacitors as well with low esr. so will report back as soon as i have tested.
Thanks dor help Dave you are a star
regards
Kevin aka Styl3r

Offline styl3r

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #174 on: January 12, 2012, 04:36:15 PM »
just found these capacitors as well look good and the next size up are in the ti data list http://www.ebay.co.uk/itm/300565558330?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #175 on: January 12, 2012, 05:35:51 PM »
I have been looking at ESR values in Aluminum Electrolytic Capacitors datasheet and find that they do not list them.
I found this information that might help.

E.S.R. can be obtained from
the following formula:

E.S.R = tan /2 .f.C.
Where: f = measurement frequency in Hz
C = measurement capacitance value in F

I have no idea if this is correct or if the ESR is in mOhms. Any help would be appreciated.

Offline styl3r

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #176 on: January 12, 2012, 06:06:06 PM »
Me neither, The only way i know is hopefully i can find a data sheet referencing the capacitor. As far as i can make out it'in ohms just found the data sheet of  one of the type i just bought 100uf 16v nichicon http://www.nichicon.co.jp/english/products/pdfs/e-pj.pdf

i also found this
If the dissipation factor (DF) is given, you can calculate the ESR from
 .
 ESR = (DF) (Xc)
 .
 Where
 . Xc = capacitive reactance = 1/(2Pi X f X C).
 .
 Remember that this calculation is only valid for the frequency at which the DF is specified.
and this

It may not work for electrolytics and hi-k ceramics, but for other types
of cap you can calculate ESR from the tan [delta] figure usually given
in data sheets. BUT it may only be valid around the frequency at which
tan delta was measured.

tan [delta] = ESR/Xc = ESR/(2[pi]fC)
But that only finds the frequency and it says further on that the esr cannot be calculated correctly and only by using the data sheet of the respective capacitor

ESL is about 1.6 nH per millimetre of distance between the points where
the cap connects to the rest of the circuit. If, and only if, the cap is
well-designed.

Looks like to equate esr gives you it's frequency
and
esl gives you the inductance

But if you were to leave the legs of the capacitor longer when soldered this would change slighly so really the only way to be sure is to use the data sheet for a particular capacitor.
Starting to get a bit in depth here.

Then i found this look further down the page and it gives you the equations
http://wiki.xtronics.com/index.php/Capacitors_and_ESR
Cheers Dave
regards
Kevin

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #177 on: January 12, 2012, 06:34:21 PM »
to answer your first point they only seem to list the ESR  if it is classed a s a low impenance (ESR) capacitor like audio grade, motherboards and more high end products, unichem, panasonic, sanyo....list theres
cheers
styl3r

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #178 on: January 12, 2012, 07:20:17 PM »
I'm getting a headache......

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #179 on: January 12, 2012, 07:38:23 PM »
Careful not to over-think it. 

Typically, ESR is rated at 100kHz.  It varies with part number, but aluminum electrolytics are usually in the 50-100m Ohm range.  MLCC caps are typically around 10m Ohm and tantalums are typically 150-200m Ohm.

If the data sheet says you can use electrolytics or tantalums then any should be fine unless the ESR is unusually high or low.  That can happen for caps with very low or very high voltage ratings which you wouldn't be using. 

From a design standpoint, lower ESR provides less ripple and more effective filtering or smoothing, but can destabilize a regulator if it's too low.  The only ones that I've run into problems with personally are  MLCC (multi-layer cermic chip) capacitors.  Though the performance is excellent with them in terms of clean output due to their very low ESR and ESL (equivalent series inductance).

Offline gknowes

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #180 on: January 12, 2012, 08:59:49 PM »
awesome mod :thumbsup: thanks for ejuice me up they were awesome vape :thankyou:

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #181 on: January 12, 2012, 10:40:48 PM »
and all this stuff gives me brain mod overload..lol

i have the 8100 and the 4050...eventually i will build a VV mod with these(while collection more TI parts and others)...

i personally dont know/care how the stuff works inside of the PV just that it works... i follow the K.I.S.S. rule...i can follow others diagrams and will learn to solder better..

until that time, i will keep reading and putting money aside for a good soldering station before i play and get frustrated with a cheap one. if i find someone to build one for me, i am good with that as well..lol

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #182 on: January 13, 2012, 03:36:34 AM »
This is certainly getting us all thinking, the data sheet for both the Ti 04050c and the 08100w both call for capactiors with a low esr rating. I have built several of these with cheap electrolytic caps and seem to get a very high volt drop, now this could be due to faulty modules but i am leaning towards cpas. I have some low esr caps on order and will be making my next mods with these and see if the results are more stable. I still have some of the caps i used originally so will breadboard using both and report findings on here, just to prove a point to myself really and may be given others guides to go by. I decided to take a look at my other components, resistors were next tested about 70 of my 10k and only 1 was actually 10k well 10.04 about a dozen were 9.92 and most were between 9.72-9.87. So have ordered 1% tolerance resistors and will hand pick what i use so i can make as close to what the schematic says will actually be fitted.
Good morning from the Uk a nice bright frosty Friday.....
cheers
Styl3r

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #183 on: January 13, 2012, 04:45:53 AM »
We could then look at the mArms of the capacitors as this is critical with this Ti module, just to make your brains throb even more..... :laughing2:
Which i must admit i forgot to look at when ordering my low esr capacitors, but just looked at the data sheet for my cpacitors and i'm ok it's 175 mArms @120hz....phew
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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #184 on: January 13, 2012, 04:57:39 AM »
Who do you get your Ti modules from and how much do you pay for them????
On my sample order from Ti it says prices are
ptn04050c      @ $10
ptr08100wvd  @ $8
but every stockist i have seen, they are priced
ptn04050c      @ $20
ptr08100wvd  @ $16

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #185 on: January 13, 2012, 06:19:14 AM »
you get them right from TI... you sign up to make an account..verify your account.... find your samples..add them to your sample cart..check out...not sure where you are or where they ship to though


Who do you get your Ti modules from and how much do you pay for them????
On my sample order from Ti it says prices are
ptn04050c      @ $10
ptr08100wvd  @ $8
but every stockist i have seen, they are priced
ptn04050c      @ $20
ptr08100wvd  @ $16

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #186 on: January 13, 2012, 07:07:42 AM »
yeah i know i have had quite a few samples but now when i try for samples it says " you seem to have had alot of samples recently please justify why you need more"
I've managed to get a few more as i said i had faulty ones in the last batch. How long would they wear ordering samples all the time.......just looked at your sample invioce and i order exactly the same is there any other modules of theirs we can use will have to go look through....
cheers
Styl3r

oh yeah i live in the UK
« Last Edit: January 13, 2012, 12:08:30 PM by styl3r »

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #187 on: January 13, 2012, 04:49:52 PM »
The sample programs chip makers make available are really intended for OEM manufacturers that build products resulting in volume sales.  It's actually an abuse of the system to acquire them for personal use.

Not that I'm trying to come off like the sample police or anything, but, it does affect everyone.  When people abuse the program, makers stop stop sending samples completely.

There have been people that obtain samples then turn around and sell them on eBay.  Microchip recently suspended their sample system because of that.  Though, what they usually do is shut it down for a few months then start it back up.

My feeling is that it's fine to order a few of something here and there for personal use, but don't make a nuisance of yourself.  Keep it the sample ordering very moderate.  If you get to the point where you are not allowed any more samples, that's too much.

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #188 on: January 13, 2012, 05:26:18 PM »
Yeah true, i am wondering if i can order directly from them as there invioced amount is alot cheaper than there outlets like digikey. I have found a stockest in the Uk...FArnell, and will be orddering directly from there as the PTR081000wvd is my favoured chip.Texas instruments sample program has allowed me find a product that  meets my reqirements so using the sample service is a great idea as the company benefit in the long run.
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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #189 on: January 13, 2012, 06:10:01 PM »
The sample programs chip makers make available are really intended for OEM manufacturers that build products resulting in volume sales.  It's actually an abuse of the system to acquire them for personal use.

Not that I'm trying to come off like the sample police or anything, but, it does affect everyone.  When people abuse the program, makers stop stop sending samples completely.

There have been people that obtain samples then turn around and sell them on eBay.  Microchip recently suspended their sample system because of that.  Though, what they usually do is shut it down for a few months then start it back up.

My feeling is that it's fine to order a few of something here and there for personal use, but don't make a nuisance of yourself.  Keep it the sample ordering very moderate.  If you get to the point where you are not allowed any more samples, that's too much.

I totally agree Craig. The Golden Goose will eventually dry up with the amount of samples I see ECF posters ordering.

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #190 on: January 13, 2012, 06:17:30 PM »
am i missing something, did we all not order samples at one time or another!!!! and now testing complete we can either go with a local stockest or if not happy with the product go with a differnet manufaturer........ is that not the way it works
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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #191 on: January 13, 2012, 06:21:35 PM »
Well, if you sample then turn around and buy from them, you're doing exactly what the sample program is intended to do.  Though they're looking for buys with volumes in the 1000's, but at least they're getting something back from you.

Some makers offer direct online purchase in small quantities and some don't.  In some cases, it's cheaper to buy direct from the maker if they offer it.  Sometimes it's cheaper to go through one of the big vendors.  I don't have a particular preference, it's mainly what's cheapest and most convenient.  Sometimes it's simply a mater of who's got stock at the time.

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #192 on: January 13, 2012, 06:29:11 PM »
I've gotten my share of sample but also buy. I've been buying the 04050c from Arrow at 15 bucks a pop. Digikey has them for 20 bucks.

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #193 on: January 13, 2012, 07:00:23 PM »
just ordered from Farnell uk 08100w great price as well £11.64 and the ptn04050cad for £13.93 and i am glad i did as i think i have realised why my last test unit did not perform as i expected. Let me explain the sample i had was the ptn0405caz and that one only has an output of 6w as apposed to the 04050cad which is 12w. So thats why when a 2 ohm load was put on the voltage lowered. I thought they were all the same output, i think Dave you were under that impression as well as stated in an earlier post. Sweet i am so chuffed i ordered from farnell it shows each module with a brief description and it's right there...happy days. I have spent days trying to sort this problem out so calculated it 5.5v x 6w = 0.9090 deffenatly not enough for a 2 ohm load. I've changed capacitor, resistors, several times thought it could be my soldering technique...it's always the simple things we overlook.
thanks to all for all the help in this, if nothing else we have certantly opened our eyes to so many different aspects of electronics on this journey.
cheers
Kev aka Styl3r

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #194 on: January 13, 2012, 07:27:39 PM »
I still think i will eventually just go with the ptr08100wvd as i think it is a better chip the only down side is you have to have a 2 battery set up unless there is a small 8-9v battery that is reasonably priced. The advantage of the 04050c is you can have a single battery setup so size is smaller and a lighter finished product. I have got 1 of each at the moment and i much prefer the 08100 just my personal preferance, might not be everbodies favourite but hey thats why there are so many options out there.
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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #195 on: January 13, 2012, 07:31:50 PM »
Welcome to electronics design, you can just never have it all.  There's always some kind of trade-off.  In this case, it's convenience and compact size versus output power and performance.

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #197 on: January 13, 2012, 07:42:32 PM »
just ordered from Farnell uk 08100w great price as well £11.64 and the ptn04050cad for £13.93 and i am glad i did as i think i have realised why my last test unit did not perform as i expected. Let me explain the sample i had was the ptn0405caz and that one only has an output of 6w as apposed to the 04050cad which is 12w. So thats why when a 2 ohm load was put on the voltage lowered. I thought they were all the same output, i think Dave you were under that impression as well as stated in an earlier post. Sweet i am so chuffed i ordered from farnell it shows each module with a brief description and it's right there...happy days. I have spent days trying to sort this problem out so calculated it 5.5v x 6w = 0.9090 deffenatly not enough for a 2 ohm load. I've changed capacitor, resistors, several times thought it could be my soldering technique...it's always the simple things we overlook.
thanks to all for all the help in this, if nothing else we have certantly opened our eyes to so many different aspects of electronics on this journey.
cheers
Kev aka Styl3r

Kevin,
I think you mean you had the PTN04050A which is 6 watts. The CAZ and CAD are exactly alike. Both are 12 watts. Only the CAZ is a surface mount as the CAD is a through-hole mount.

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #198 on: January 13, 2012, 07:44:14 PM »
I think Farrel is not correct. As opposed to Digikey, TI and Mouser

The horses mouth:
http://www.ti.com/product/ptn04050c

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Re: .44 mini Booster Box Mod Variable Voltage
« Reply #199 on: January 13, 2012, 07:55:21 PM »
umm just recalculted so 6w output @5.5v gives 1.09090r to keep the supply @5.5v and a 2 ohm load you would need 2.75a or 15w i think that is right. If that is correct then the ptr08100wvd is deffinatly the better chioce as it outputs 10a so plenty.
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