Anyone done anything interesting with DX's/DXsoul's AK-007 driver?

[ohaya]

Hi,

I’ve used DX/DXsoul’s AK-007 driver in several of my Hubsby XP-1/XP-2 lights. This driver:

http://www.dx.com/p/ak-007-0-8-1-5v-3-mode-circuit-board-for-flashlights-11-9mm-50526#.Vol18_lunIU

MEGAJUDI303 : Slot88 Slot Online Gacor Maxwin Pulsa Tanpa Potongan

There’s a comment in a review on the latter page, that got me curious:

Tiny, powerful little driver Involvement:Expert (understands the inner workings) - Ownership:1 week to 1 month Pros: Really tiny driver, with sufficient output to drive a cree XPC or XPG with 1.5v AAA battery. Can be used with a 10450 battery too. Cons: Bad soldering on the 3 mode function board causes contact problems, had to resolder the contacts to work properly. Also found the inductor broken on some boards. OtherThoughts: The 3 mode board could be removed if you need to save space/don’t need gimmicky flashing lights. Still will work, but with only the high power mode. Bottomline: Great find on DX, will order more to mod more torches

So, I started looking around for info about possibly modding this driver and among other info found this thread:

Blue 1W mini with Tank007 driver.

which seemed to identify the driver as using a PAM2803 IC, and which also mentions the sense resistor:

Ok just played with one of these drivers again. The top PCB doesn’t affect regulation. It is purely for modes. The driver operates properly without it.

The regulator IC is stenciled CFC1H which I can’t match to anything unfortunately.

However It’s not hard to figure out which resistor is the current sense. It’s stock value is .27 ohms. I added a .51 ohm resistor in parallel, since it was the smallest thing I had… Which resulted in about .177 ohms of resistance. Which raised the regulated output current to 550mA

Just ‘guessing’ about how the IC is wired, it seems to be similar to a PAM2803. But I can’t be sure of that. IF it is similiar in spec. Going to a .1 ohm sense resistor will make it put out about 950-1000mA of regulated output… WHich is probably where it’s upper limits are.

That then lead me back to this BLF thread:

[WIP] 15mm PAM2803 w/ ATtiny13A rough layout / possibility

I really don’t know if this will work. A lot of sacrifices to components have been made: voltage divider deleted uhm, actually maybe that was it? So I layed out an ATtiny13A and what I think is an entire PAM2803 boost circuit in a 15mm PCB w/ 0.75mm electrical and physical keepouts around the edges… The inductor I used is way too small I think. You can see in the image that I measured a 5.5x5.0mm rectangle, this is closer to a realistic inductor I think. Those are the approximate footprint di…

So has anyone worked with/hacked this driver?

I’ve been doing some ATtiny programming, so I’d really like to be able to program my own modes. In the past, I posted about swapping an ATtiny onto an EAST-092 driver, i.e., replacing the non-ATtiny driver with an ATtiny driver, so if this doesn’t already use an ATtiny, I’m wondering if it’d be possible to do something similar, i.e., replace the MCU with an ATtiny, and then program it with my desired modes?

Anyone?

Thanks,
Jim

EDIT: Some pics of the driver:

The top board. The (presumably) MCU is erased (no markings).

Showing the two boards from the side:

[Rufusbduck]

Fun project! I have one and would like to try this as well. The current tiny10 1x 7135 oshpark board will probably work for now since it has all the necessary pads and vias. I also have a couple of the $2.58 cheapo XP lights on the way to compare boost designs. First thing necessary is to sample output stock and then separate the boards.