This is basically just my simple impression of this driver along with some measurements and resistor fiddling. I paid 5$ for it. Link to driver.
:
Its 22mm wide and about 14mm tall (when the toroid is flat against the board). It could fit inside a pill that is around 12,5 to 13mm tall.
Driver is 3 mode like advertised. Stock emitter current was about 2,32 high (after it had sinked fast from about 2,4A), low was 0,46. It was advertised as a 3 amp driver. Strobe was most likely the same as high.
Output seemed to be pretty much the same no matter what the input voltage I tested it with in the 5,5-16V range.
Its got next mode memory. :Sp
It does not work with an MT-G2.
I did not notice any PWM whine, but I was not in a quiet environment. I can not comment on PWM.
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Can output be increased?
There are 3 resistors in the middle of the board (having the markings R2 and R3 beside them on the board) The two resistors on the board are R270. The white one, which is stacked upside down on top of one of the R270, is marked R220.
I placed one R120 on top of that again.. With some devilish horns.. >)
High was then 4A, but after fairly short time I saw hint of smoke, and the board was super hot. I guess it was too much. Especially with the board hanging in the loose air. Probably too much in general. Especially considering what this driver board was originally. When the driver had two R270 resistors (I removed the white upside down resistor), output was 0,71 on high, and 0,15 on low.
I tried combining 2xR270 (the ones on the board) and the R120 instead of the upside down R270. That gave me 2,46A on high and 0,5A on low. Not much more than when it arrived. I could probably push it further, but I do not know how healthy that is.
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Efficiency:
With the 2xR270 + 1xR120. Output on high was 2,46 to an XM-L. I did not measure output voltage, but I assume 3,25V.
I measured input amps and volt and came up with the following numbers:
Driver efficiency (after a little mod) is around 75%.
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Conclusion so far:
It might be decent if I can get rid of the next mode memory. Help/tips appreciated!
I had hoped this driver had the advertised 3A output , and could easily handle 4-5A+ if modded. Would be great to have a cheap compact driver that had a flexible input range and could deliver some decent amps. Maybe even be a nice driver for an MT-G2. This was not it...
It is flexible in terms of input voltage, and it is cheap. If it just arrived with anything else than next-mode memory I could probably find it useful for something. Right now its collecting dust.