[in Design process] FT 03 CC FET white flat driver

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Lexel
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[in Design process] FT 03 CC FET white flat driver

Lexel
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Lexel
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Th558
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Interested. Is this for the white flat 2 or 1? 2mm would make more sense.

ZozzV6
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5A is for 1mm. The 2mm version need 9-10A

Lexel I am in for one but in parts kit version as my earlier driver orders. I maybe add some other drivers or aux led boards to my order.

808Hi
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Interested

Lexel
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ZozzV6 wrote:
5A is for 1mm. The 2mm version need 9-10A

Lexel I am in for one but in parts kit version as my earlier driver orders. I maybe add some other drivers or aux led boards to my order.

1mm2 is 4A, the 2mm 7A near the max output peak, also considering temperature of flashlight after some time running

I hope driver does not get too hot on 7A will need to test that,
I hope the solder filled viases doing a good job on heat thransfer from FET to the Ground plane

mattadores
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interested!

HONDARIDER
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Definitely interested. I have 3 of these light and would love to mod one for a little more throw just to show off to my friends.

oweban
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Interested!

HONDARIDER
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Lexel, Where does one go to purchase drivers for other items that you have built?

4492011
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Will this include the usb charging ?

Lexel
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HONDARIDER wrote:
Lexel,
Where does one go to purchase drivers for other items that you have built?

Actual ready to sell items are in the different sales topics
http://budgetlightforum.com/node/59724
http://budgetlightforum.com/node/57900
http://budgetlightforum.com/node/57772
http://budgetlightforum.com/node/61921
http://budgetlightforum.com/node/57724
http://budgetlightforum.com/node/66094

if you found a fitting board just PM me

4492011 wrote:
Will this include the usb charging ?

its designed to fit the original charging board
still transplanting it is not so easy those brass rods are a beast if you try just with an iron
I found out iron plus Hot air workst best

Lexel
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the first prototype will get on my next board order within the next days
it will be usual 1 Oz copper to do first function tests and see if it fits the light flawless as I made manual measurements of the original driver

this will take about 3-4 weeks from China

also if thats done the final production board in 2 Oz will take also some time

mattadores
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Hey Lexel,

I thought that you could already swap the white flats into the FT03 without any other mods.

I’m planning this mod for my DOA FT03 host I have kicking around. Can you help me understand what the need/benefit is of this?

I’ve never built a driver and I’m wondering if I would be able to simply salvage all the parts off the FT03 SST-40 driver and re-install them on this one?

oweban
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IIRC white flats start going “pop” at 5A and above; the stock FT03 driver hits ~9A on turbo (FET and all that).

mattadores
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that would do it alright if that’s the case.

lol ok I want one. but how do I build an all new driver Facepalm

oweban
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No idea, I’m just going to wait until it’s complete Wink I still need to chip in to his gofundme.

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why there is LDO?, isn’t this is 1 cell flashlight?, you could use 2*26350, but it makes no sense to me

and btw, how can you controll current with MCU.

Forgot my pen

Lexel
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mrheosuper wrote:
why there is LDO?, isn’t this is 1 cell flashlight?, you could use 2*26350, but it makes no sense to me

and btw, how can you controll current with MCU.

why are people always thinking too much?
a LDO is just a thing that puts out a constant voltage it is not a magical 2S or 4S conversion part
on 2S/4S builds the cell voltage would be above 6V absolute maximum voltage rating of an Attiny MCU, so you need to bring the voltage down (z-diode or LDO)

.
totally different story here it remains 1S—>3V driver(could be as well used for 2S—>6V LED)
the LDO is there because it is needed on a CC build
reason:
Attiny MCU puts out a PWM signal, the operation amp needs a DC level
so this PWM signal gets filtered to a DC signal using a low pass
if the MCU voltage is not stabilized then the CC set voltage would vary depending on battery charge(like 2.5A with emtpy battery and 4A with full)

Lexel
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mattadores wrote:
that would do it alright if that’s the case.

lol ok I want one. but how do I build an all new driver Facepalm

who says you have to build it?
I am developing and building it
when its ready it will be sold

so far I am close to order the prototype of it as design looks good
function got tested on 22mm prototype so it should work

Ryzbor
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oweban wrote:
IIRC white flats start going “pop” at 5A and above; the stock FT03 driver hits ~9A on turbo (FET and all that).

You mean the 2mm WF?
Does it hit ~9A on a low drain (10A rated) 21700?
A local modder here offers FT03’s with the 2mm white flat so I assumed it’s safe for the 2mm.

good tint: Nichia E21A 2000K-7500K except d240 bin, Nichia 219B sw40/sw45, 219C sw303, Cree XPL-HI A/D bins, XHP70.2 5A, Samsung shaved LH351D's, Luminus shaved SST-20's.

ZozzV6
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Ryzbor wrote:
oweban wrote:
IIRC white flats start going “pop” at 5A and above; the stock FT03 driver hits ~9A on turbo (FET and all that).

You mean the 2mm WF?
Does it hit ~9A on a low drain (10A rated) 21700?
A local modder here offers FT03’s with the 2mm white flat so I assumed it’s safe for the 2mm.


It is not that simple. A fet driver max output current depends on led forward voltage a lot. An XP-L HI draws like 5A but a 3V XHP50.2 can draw 14A from the same driver. in my L6 a White flat 2mm hit 10A with Liitokala 26650.
oweban
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Ah, I meant the 1mm on the 5A. Pretty sure people have had 2mm at 10A no probs (as per ZozzV6’s comment).

ZozzV6
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I needed to lower the turbo because 2mm white flat turned blue at full power.

Lexel
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oweban wrote:
Ah, I meant the 1mm on the 5A. Pretty sure people have had 2mm at 10A no probs (as per ZozzV6’s comment).

On those currents you already are beyond max lumens and output is dropping, not healthy for the LED

It is better to stay a bit below max test bench output current and have regulation on a high drain battery not only when it is full

DD is no real option for those ultra low forward voltage emitters

oweban
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Definitely agree – finding the best regulated output (4.5A?) as a maximum is a good idea. I figure you know what you’re doing, so I’ll just wait patiently Smile

ZozzV6
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My tries of white flat 1mm version showed that 4,5A is good for this emitter. Worth the bump from 4A but over that nothing significant output increase happening. Just more heat and turning angry blue over 5A

mattadores
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Lexel wrote:
mattadores wrote:
that would do it alright if that’s the case.

lol ok I want one. but how do I build an all new driver Facepalm

who says you have to build it?
I am developing and building it
when its ready it will be sold

so far I am close to order the prototype of it as design looks good
function got tested on 22mm prototype so it should work

Big Smile I thought you were selling blank driver boards.. not fully built just wire it up boards!

Definitely buying one!

Lexel
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Why should I sell bare boards?
Without parts you wont be able to equip those easily
Without stencil you cant apply the paste as well to viases

4492011
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I think that the need for the driver should not be based upon the 1mm flat white plenty of linear drivers for that, but for the 2mm flat white hopfully to get the full potential from the emitter

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