Multi-level driver for SSC P7 under $8 ?

NetKidz · Mar 19, 2008

After I connected two ordinary 4x AMC7135 boards, I just thought this cheap board may also be able to connect to a multi-level driver to provide the current P7 needs.

The multi-driver used is DX SKU.6190 5-mode or DX SKU.7612 16-mode Driver connect with DX SKU.1886 4x AMC7135 board

Here's the connection chart:

I didn't know how the MCU works, but I think it use PWM to drive AMC7135's VDD pin. Thus just connect many AMC7135s VDD together and they'll provide enough current to drive P7.

From SilverFox's NiMH test, eneloop should be able to keep above 1.1v under 3A load. 4x eneloop should keep AMC7135 stay regulation. I'm waiting my other P7 and DHS heatsink. I haven't tried it yet, but I think it should be fine. Any suggestion?

Thanks.

StefanFS · Mar 20, 2008

How did you connect the two ordinary 4 x AMC7135 drivers? Just in parallell? How did it work out?
I have burned some drivers experimenting with my P7.

Stefan

NetKidz · Mar 20, 2008

Hi Stefan,

Yes, just in parallel. Here's the wire diagram:

On DHS heatsink:

Haven't finished the whole mod yet. Tested with 4x eneloop and the current is about 2.5A.

StefanFS · Mar 20, 2008

Looks good. I also tried that. Might still use it in a coming mod. Right now I get ~2.6-2.7A with direct driving on three NiMH cells. Works really well, but 2.5A might be better since it will run cooler.
Stefan

rizky_p · Mar 20, 2008

@NetKidz Can you post a pics showing P7 on top of DHS heatsink?

Isnt that Dean connector is abit overkill?

JST-XH is enough IMO.

Really nice on the driver, cheap alternative...

NetKidz · Mar 21, 2008

@StefanFS

I like regulation, so I decided to use 4x NiMH with AMC7135 instead of DD.

But 2.5A is still hot.

@rizky_p

Yup, it's overkill. But I only have it laying around. :green:

Here's P7 on DHS heatsink:

I sand of the centering ridges. I only have a small model drill and couldn't drill through the pedestal like Mac's Seoul P7 Mag. Due to the distance of the wires, I must enlarge the reflector hole a lot. :sick2:

zelda · Mar 21, 2008

What type of thermal compound do you use for the drivers?

Zelda

NetKidz · Mar 21, 2008

Hi zelda,

Arctic Alumina Thermal Adhesive.

zelda · Mar 21, 2008

Thank you,

zelda

DaFABRICATA · Mar 21, 2008

I suggest a Uni-Bit for drilling very nice holes and for opening up holes on reflectors. It works great and leaves a nice finish.

Mel_PL · Mar 21, 2008

NetKidz said:
Here's the connection chart:

Any suggestion?

Thanks.

It works!

-- M.

MatajumotorS · Mar 21, 2008

NetKidz said:
After I connected two ordinary 4x AMC7135 boards, I just thought this cheap board may also be able to connect to a multi-level driver to provide the current P7 needs.

The multi-driver used is DX SKU.6190 5-mode or DX SKU.7612 16-mode Driver connect with DX SKU.1886 4x AMC7135 board

Here's the connection chart:

I didn't know how the MCU works, but I think it use PWM to drive AMC7135's VDD pin. Thus just connect many AMC7135s VDD together and they'll provide enough current to drive P7.

From SilverFox's NiMH test, eneloop should be able to keep above 1.1v under 3A load. 4x eneloop should keep AMC7135 stay regulation. I'm waiting my other P7 and DHS heatsink. I haven't tried it yet, but I think it should be fine. Any suggestion?

Thanks.

:twothumbs Nice Job!

p.s. If you are familiar with programming, you could make controller switch one, 2 ,3 and all AMC at a time, to raise effeciency at low levels

rizky_p · Mar 29, 2008

Nice thanks.

NetKidz said:
@StefanFS

I like regulation, so I decided to use 4x NiMH with AMC7135 instead of DD. But 2.5A is still hot.

@rizky_p

Yup, it's overkill. But I only have it laying around. :green:

Here's P7 on DHS heatsink:

I sand of the centering ridges. I only have a small model drill and couldn't drill through the pedestal like Mac's Seoul P7 Mag. Due to the distance of the wires, I must enlarge the reflector hole a lot. :sick2:

fxstsb · Apr 7, 2008

NetKidz said:
After I connected two ordinary 4x AMC7135 boards, I just thought this cheap board may also be able to connect to a multi-level driver to provide the current P7 needs.

The multi-driver used is DX SKU.6190 5-mode or DX SKU.7612 16-mode Driver connect with DX SKU.1886 4x AMC7135 board

Here's the connection chart:

I didn't know how the MCU works, but I think it use PWM to drive AMC7135's VDD pin. Thus just connect many AMC7135s VDD together and they'll provide enough current to drive P7.

From SilverFox's NiMH test, eneloop should be able to keep above 1.1v under 3A load. 4x eneloop should keep AMC7135 stay regulation. I'm waiting my other P7 and DHS heatsink. I haven't tried it yet, but I think it should be fine. Any suggestion?

Thanks.

What I can imagine is a 3 mode in a 4 C cell Maglite. 3 18650's fit in perfectly. So that is roughly 12 v @2.5 amp. I can imagine mode one- 2.5 amp, mode 2 -1.25 amp, and mode 3- .625 amp.

smopoim86 · Apr 12, 2008

Would it be possible to use one of those multimode drivers and one of these https://www.kaidomain.com/WEBUI/ProductDetail.aspx?TranID=4338 instead of 2 of the others. If i understand correctly, the 8x is the same board, only stacked and bridged, correct?

TorchBoy · Apr 12, 2008

I don't see why not, as long as the right connections are made between the boards.

Norm · Apr 14, 2008

NetKidz any chance of buying 2 X DX SKU.1886 4x AMC7135 board boards from you? I don't really want to buy ten.
Thanks Norm

Tidra · Apr 15, 2008

Call me stupid, but I can't get any regulation when wire together two of those drivers.

If I wire them together like showed in this post I got only 1.4A like from 4xAMC7135...

If I just take a part (-) wire for the LED, then both drivers work like it supposed to, one with regulation modes up to 1A and another almost 1.4A, but together only 1.4A and no regulation,…

What am I doing wrong???

I removed diodes and wire jumper,...

Thank you
Iztok

StefanFS · Apr 15, 2008

Tidra said:
Call me stupid, but I can't get any regulation when wire together two of those drivers.

If I wire them together like showed in this post I got only 1.4A like from 4xAMC7135...

If I just take a part (-) wire for the LED, then both drivers work like it supposed to, one with regulation modes up to 1A and another almost 1.4A, but together only 1.4A and no regulation,…

What am I doing wrong???

I removed diodes and wire jumper,...

Thank you
Iztok

I think a picture of it might help to identify what might have gone wrong.
Stefan

smopoim86 · Apr 15, 2008

Norm said:
NetKidz any chance of buying 2 X DX SKU.1886 4x AMC7135 board boards from you? I don't really want to buy ten.
Thanks Norm

The p7 driver on KD is just two of them sandwiched in parallel.

Multi-level driver for SSC P7 under $8 ?

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