Review: KD 7135 V2 drivers 3040/2280/1520 mA with mode configuration

That can be done, the resulting drive current will be 2280 - 380 = 1900 mA. I think I would choose the 1520 mA type as it is not a very easy task to remove a chip if you have not tried it before and the benefit of driving the XPE that hard is little. It can be done thougt with a heat gun with a small nose and pliers or with a medium big soldering iron, but it is easy to overdo the heating.

Awesome info. I had no idea these were binned...does each get tested individually?

Do you have any sources for the bare chips by chance?

Thanks for the review.

If you really want 2A it might be easier to just grab some of these.

Thanks guys, I'm not worried about giving it a try with the soldering iron and I quite like the user selectable modes so I'll give it a go.

Mine came the other day , got the 2A and 3A ones ..

Certainly look interesting ..

Id be most interested to know if the 3A versions actually test out at 3A. Do you plan on installing one soon? Are your 7135's also marked as "38K"?

Ive got my fingers crossed for this one. Lets hope it performs as expected.

What is that part on the left side of the solder pads? It is missing on one of my drivers.

That's a decoupling capacitor for the µC to stabilize it's power supply.

Probably works without it.

Thx

I got the 2280 mAh version today and just finished a dropin. Mine are marked 38K and I tested the dropin on high and got 2.274 A. So good news there.

The bad news is that the low mode is just two damn low. These needed to keep the low of the 105c (60-80mA) and then have the new moonlight mode (6-7 mA on this 2280 version) as an option instead of having 4 disco modes. So close and yet so far. I'm glad I have a reserve of 105c's.

Does this fit the "famous" UF-980L? (17mm?) Now that i have so many throwers, i'd like to give that light a new lease of life. The looks and built is pretty decent, but then the PWM turns me off.

I'll see if it fits the Yezl big head XM-L floody as well. That light is decent, and is a XM-L flooder, has a decent low but the 90Hz PWM renders it somewhat unusable.

Had a couple of the 8*7135 version arrive today. Both are 38K's

Thanks very much for the well done review! Frontpage'd and Sticky'd.

Any idea on the lumens of the low low? I am waiting for the 3040 to arive. I was worried about the low low being too high. Now I'm really worried it's too low. Would it be lower than a quark low?

A measurement of the LED (XM-L T6) in low mode was 0.9 Lumen in my integrating sphere. In a light that will become around 0.7 Lumen.

That doesn't sound too bad. Quarks are around .2 lumens to .9 . I guess I'll have to see when I get it though.

On a Quark the next step up isn't 300+ lumens. :p It would have made so much sense to go with 4 levels. I bet a revision will be in the works quickly.

The 105c gives me 2.8 and this one gives 2.91 with a 4.05V Rev.Jim. The low is a really nice single lumen. To me, the leads were easier to solder than on the 105c. Just a bit more room. I went for three mode, LMH with no memory. I really like this driver a lot with all the different setup choices.

I hope to get around to testing them after Xmas , ordered a lot of stuff , and nothing got here before Xmas [ my stuff ]

I bought an ebay light , and the plan was to use it for testing these drivers

I just replaced the driver in my MF UF 3 mode with one of these. No way to measure current at the led but I'm seeing 3.04A at the tail with a freshly charged (4.21v) AW IMR and 3.00A from an AW 3100 at 4.07v. I'm pretty happy with these results since I was seeing 3.8A+ from the 3100 and 4.5A+ from the IMR with the original driver. Hopefully the heat and output sag will be reduced. I also like the low. It seems to be about perfect for reading a map in a dark car without blinding the driver or looking for something in the bedroom without disturbing the wife's sleep.