Romisen@6xSSC P7 DSVMI mod - 4500 lumen!

Mike cz · Oct 22, 2009

A large problem was the power 6xSSC P7. I did not want to connect SSC P7 directly to the 2x18650. After a long search, I found this switching power supply: LSM2 T30 W12 DC-DC switch!
http://www.murata-ps.com/data/power/lsm2-t30-d12.pdf

Technical parameters DC-DC switch are amazing:
Iout = 30A (set to ~15A) (Uout = 0,8-3,6 V) total 125W!
Uout = 0.8-5V
Uin = 5-15V
Size 33x13,5mm
Efficiency 94%!
Price € 25

-the OFF-mode (electronically) flows into switch regulator 0.9 mA (at uin = 8.4 V), but this is still very much ..
-it is a voltage buck regulator, which is totally unsuitable for LED. It must reckon with the fact, that when the LED heat up, current to the LED is larger. This can be easily solved with PTC thermistor ...
-so strong boost converter is not, and if yes, it was very expensive.

DC-DC switch LSM2 T30 W12 is very small!!!

I cleaned the thread Romisen, because the current of 2x18650 is 7-8A.

I made for DC-DC switch auxiliary PCB with a special spring. On the PCB is soldered 40x10uF capacitors Taiyo Yuden with 50miliohm ESR for DC-DC switch.

Added 3-mode switch. Each mode is arbitrarily set by trimmer.

Comparison with the original (15W) DC-DC switch

Cooler for P7 with thread, this is not original.

Drilling 1,5mm holes with thread gave me a lot of work. SSC P7 are soldered to Cu washer. It was difficult, because the whole washer must be warmed up
220 °C. On the picture is also seen PTC thermistor for temperature compensation.

This is a komplete flashlight.

Technical parameters:
Mid: 20W (efficiency 105 lm/W*20=2100lm!)*
Low: 5W (efficiency 120 lm/W*5=600lm!)*
High 50W (current over 15A)*
On high 50W is between 4300-4800 lm
*These mode's is not PWM

With 2xPanasonic 2900mAh:
Mid: 1hour
Low: 4hours
High: 20min

Theoretically SSC P7 DSVMI has 2,8A/3,25V(testing) and 800-900lm => 88-99 lm/W!
The 6xSSC P7 DSVMI => 6*2,8A*3,25V=> 54,6W*88lm/W=> min 4800lm (max 5400lm)!!!

I could set even more power: 60-70W or more :naughty: - over 55OO lm, but then is poor efficiency and the problem with the coolin...

For more information and pictures on the Czech forum http://forum.fotonmag.cz/index.php?showtopic=436&st=40&start=40 on 17/9/2009 (in Czech).

bluecrow76 · Oct 22, 2009

Re: Romisen 6xSSC P7 DSVMI

Very impressive!

Anto · Oct 22, 2009

Re: Romisen 6xSSC P7 DSVMI

Wow!!!

Tim Carleton · Oct 22, 2009

Re: Romisen 6xSSC P7 DSVMI

Ok, since you did that for your first post, I want to see your next one about making a miniature generator that's turbine powered driving 5 hid bulbs in a 3d host. :poke:

That's excellent craftsmanship, well done. :welcome:

pmoore · Oct 22, 2009

Re: Romisen 6xSSC P7 DSVMI

Holy Crap!, can't wait to see some beam shots.

Paul

pOkiE · Oct 22, 2009

Re: Romisen 6xSSC P7 DSVMI

[Disgusting juvenile comment removed - DM51]

Hack On Wheels · Oct 22, 2009

Re: Romisen 6xSSC P7 DSVMI

Best first post I've seen yet! The attention to detail and thoroughness is astounding, great job.

Wondering about the batteries though... what would the current draw from them be? I'm assuming its quite high on high, so I'd recommend looking into some IMR batteries from AW; they might be a bit safer and could even run longer under high drain conditions.

pepko · Oct 23, 2009

Re: Romisen 6xSSC P7 DSVMI

very nice ...

i think this is the best homemade flashlight on CPF !!!

:goodjob:

moviles · Oct 23, 2009

Re: Romisen 6xSSC P7 DSVMI

nice, really really nice :twothumbs :clap:

:goodjob:

how to clean tread of romisen? acid?

Is this the stock heatsink of the romisen?

if it is not put a photo of the original one please :popcorn:

Aircraft800 · Oct 23, 2009

Re: Romisen 6xSSC P7 DSVMI

That is INSANE!

Something is a little fishy here, that is NOT a first post!
Where have you been hanging out?
How long have you been lurking here?
You must have some kind of electronic engineering background?

:welcome::bow::bow:

Mike cz · Oct 23, 2009

Re: Romisen 6xSSC P7 DSVMI

to Hack On Wheels:
AW IMR18650 1600mAh capacity is very small ... I use mostly Romisen on mid mode. Panasonic 2900mAh are for me better. I use currently still TR25OOmAh, Panasonic 2900mAh I have not personally.
Even Romisen(mode 50W) shine 20 minutes(Panasonic 2900mAh), this is 16666mWh/2=8333mWh, AW IMR18650 only 5000mWh. I draw information from this: http://forum.fotonmag.cz/index.php?showtopic=691&st=0&start=0

Current consumption is in Romisen of 2x18650 between 7-9A. Theoretically:
first 1 / 4 time is a current consumption into 7A (I think, Panasonic 2900mAh has voltage 3.5V), 500mAh capacity is exhausted,
next 1 / 4 time is a current consumption into 7,5A (I think, Panasonic 2900mAh has voltage 3.3 V), 1000mAh capacity is exhausted,
next 1 / 4 time is a current consumption into 8A (I think, Panasonic 2900mAh has voltage 3.1 V), 1500mAh capacity is exhausted.
Then is a current consumption into 8.5A and then is a current consumption momently 9A..., 2000mAh capacity is exhausted.

to moviles:
Yes, acid FeCl3. I spotted carefully dropwise FeCl3 directly on the thread. After 10-20 minutes was thread clean.

Yes, this is not original heatsink. On the photo is comparison with original.