and definitely ... when output current is over 1A ... is almost like is not regulated at all ... and its value is dependent by temperature ... ballast (loading resistor) in series with laser diode is a bad option (at higher currents, dissipated power could exceed easier 2W, which will heat it...
Great to hear such news.
To be sure that I understood ok, on your modified version, you are powering it at:
- 2 x 18650 Panasonic cells
- you are using 2 x IIRC in parallel
- regulated output current is 1.2A on each IIRC
Question: each IIRC is drawing 2.7A from Panasonic cells...
I saw your notes on provided link. Hm... not convinced ... maybe you are drawing 2.7A from power source, which is not the same with the current flowing on output circuit, through laser diode.
With 4 diodes dummy driver, at 4V2 input, is drawing ~2A from source and is taking out...
Did someone use this driver in picture attached?
It is marked to be booster for blue diodes which support 3.7-4V2 input and 3A output. I am really in doubt that this driver will support 3Amps on output which is meaning at least 12w for blue diodes...
I've did some tests using a...
thanks wby300, you are fair posting here other pics ... but, what I was afraid seems to be true... some of them looks like it has glue over the cap obstructing partially orifice from when light is going out from diode ... why it looks so dirty? there is no way the extract it cleaner?
I do not know if intentional or not, but from picture above, almost all (excepting) one diode, are shown from behind. If not intentional, could you please to post here, better pictures show front view of those diodes? To convince us that diodes does not look dirty or are not...
And another question: "The switching regulator IC chip has an efficiency as high as 91%"
Can somebody explain what does it mean 91% efficiency? As I could understand, it is referring about heat-sink, but I cannot understand how and what exactly it mean ...
I will take care about it, but it would be nice if will be 15mm dia. This one is 16.8mm ... but I will take care about it ... sent a PM to lazereer and waiting his answer. He produced a lot of PCB, and this is confusing users but is proving that is still looking for and identity and...
That's the point :) , I would like to be adjustable. I cannot use preset currents. As I am able to see:
- x-drive come with preset currents. Does exist also adjustable version?
- x-drive size is 10.3x15.4 (so will not fit inside Aixiz module) but exist also many other version with smaller PCB...
I am not sure that I understood correctly.
For unprotected cells:
"75-150 mOhm - Excellent
150-250 mOhm - Good
250-350 mOhm - Marginal
350-Up mOhm - Bad"
And for Protected Cells we should add 50mOhm to above benchmark?
I am looking to find a small driver able to drive some TO-18 IR diodes (require on output: 2.4V/1A-1.5A). I prefer to be something adjustable (but is not a must) and input up to 4.2V. What you suggest? Regards, Alx