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Old 04-27-2012, 02:04 AM   #1
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Default Looking for high output driver (23V, 3A)

I know most of you specialize in smaller drivers, but I was just seeing if anybody knew of a boost driver IC that can do 3 amps at 23V? Input is 11.7V (3x 26650)

I'll be using it for my 7x XM-L T6 flashlight

Last edited by AutoItKing; 05-02-2012 at 10:27 AM.
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Old 04-27-2012, 02:12 AM   #2
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Default Re: Looking for VERY HIGH output driver (23V, 3A)

Most laser drivers arent too good for flashlights and vice versa. Check out DX, they should have some flashlight drivers there on the cheap. Around here we usually dont go over 2A at 7.4V for the output on drivers.

Last edited by TacoHerder; 04-27-2012 at 02:12 AM.
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Old 04-27-2012, 02:14 AM   #3
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Default Re: Looking for VERY HIGH output driver (23V, 3A)

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Originally Posted by TacoHerder View Post
Most laser drivers arent too good for flashlights and vice versa. Check out DX, they should have some flashlight drivers there on the cheap. Around here we usually dont go over 2A at 7.4V for the output on drivers.
Yeah I kinda figured as much, but it doesn't hurt to ask right?

I have a driver on the way from KD, but it's way too huge so I'm just seeing if I can find/build something smaller.

Last edited by AutoItKing; 04-27-2012 at 02:15 AM.
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Old 04-27-2012, 02:22 AM   #4
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Default Re: Looking for VERY HIGH output driver (23V, 3A)

make sure you get some good heat sinking. That sucker is going to get HOT.
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Old 04-27-2012, 02:24 AM   #5
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Default Re: Looking for VERY HIGH output driver (23V, 3A)

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Originally Posted by TacoHerder View Post
make sure you get some good heat sinking. That sucker is going to get HOT.
Haha oh yeah!
Even at 40W I can only run it for ten minutes before I can't hold it any more.

Last edited by AutoItKing; 05-02-2012 at 07:34 AM.
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Old 04-27-2012, 02:26 AM   #6
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Default Re: Looking for VERY HIGH output driver (23V, 3A)

You should be looking at driver circuits that use external power transistors (fets, ect) and diodes at this power level. You're looking at 10 amp+ switching transistors here, there are few if any integrated circuits with those on board.
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Old 05-02-2012, 06:58 AM   #7
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Default Re: Looking for VERY HIGH output driver (23V, 3A)

Okay I'm back. Killed my driver that barely fit in the space. (20 bucks down the drain)

Who knows of a 23V 3A boost driver? Input is three Li-Ion cells.
While I could probably make one myself, I'd rather save myself the headache.

Last edited by AutoItKing; 05-02-2012 at 06:59 AM.
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Old 05-02-2012, 07:10 AM   #8
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Default Re: Looking for VERY HIGH output driver (23V, 3A)

Okay, found an IC that would work: Lighting and Display Solutions - White LED Driver - TPS40211 - TI.com

4 to 52V in and up to 250V out. 6A max. Should work just fine.

Now to print out the datasheet and get to the calculations... ugh I LOVE math... -_-

Last edited by AutoItKing; 05-02-2012 at 07:24 AM.
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Old 05-02-2012, 09:56 AM   #9
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Default Re: Looking for VERY HIGH output driver (23V, 3A)

I would check out taskled.com... they have a wide selection of very high quality drivers... some of em especially the Flex can be a bit expensive, but are LOADED with options, and from what I remember can take upto 25Vin and have a drop of about 1V for the driver.
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Old 05-02-2012, 09:59 AM   #10
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Default Re: Looking for VERY HIGH output driver (23V, 3A)

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Originally Posted by cilegray View Post
I would check out taskled.com... they have a wide selection of very high quality drivers... some of em especially the Flex can be a bit expensive, but are LOADED with options, and from what I remember can take upto 25Vin and have a drop of about 1V for the driver.
Oh snap, the b3flex is perfect! 23V, 3A out! And up to 25V input...



EDIT: Nevermind... it's a buck converter. Gotta have a greater input than output

No boost driver that powerful.

Last edited by AutoItKing; 05-02-2012 at 10:07 AM.
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Old 05-02-2012, 10:13 AM   #11
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Default Re: Looking for VERY HIGH output driver (23V, 3A)

If you're going to be driving 23V at 3A... that'll be a 6A+ draw on your cells, just make sure your switch and cells can handle the draw.
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Old 05-02-2012, 10:17 AM   #12
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Default Re: Looking for VERY HIGH output driver (23V, 3A)

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If you're going to be driving 23V at 3A... that'll be a 6A+ draw on your cells, just make sure your switch and cells can handle the draw.
Yes they can. I've already run it at that output. It drew 8amps at the tail cap.
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Old 05-02-2012, 03:00 PM   #13
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Default Re: Looking for high output driver (23V, 3A)

Eeeemmm... Yeah, you're going to have some interesting time finding an IC that can do that much in that small of a space.

You could possibly look at Texas Instruments power modules. I don't know how well they'll perform (if they're even boosters at all!) but it's something to check out.
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Old 05-02-2012, 09:28 PM   #14
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Default Re: Looking for high output driver (23V, 3A)

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Originally Posted by Le Quack View Post
Eeeemmm... Yeah, you're going to have some interesting time finding an IC that can do that much in that small of a space.

You could possibly look at Texas Instruments power modules. I don't know how well they'll perform (if they're even boosters at all!) but it's something to check out.
I found a TI IC that will work. And it uses a fairly high frequency which means I can use a smaller inductor!
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