Test/review of Led driver 17mm 3A LiIon Fasttech 4594600

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Jerommel
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They weren’t super cheap.

Found them on Ebay:

https://www.ebay.com/itm/1206-Metal-Alloy-SMD-SMT-Chip-Resistors-1-1W-0-001R-0-005R-0-008R-To-0-03R-Ohm/263868106346

Barkuti
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Oh! Well, had to find some better deals:

Of course 10 pieces is probably all you may need, but just in case. The 68mΩ resistor can be nice for certain regulated drivers like the H1-A, H2-C, LD-29, etc.

 

Cheers 

P.S.: Gonna build something with LD-25 plus white flat KW CSLNM1.TG maybe, Jerommel?

The Light Innocent I am

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Jerommel
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Yeah, waiting for those parts to make a B158 with the White Flat 1mm²
I also put a LD25 and a Flat White 1mm² in a Solarstorm SC01, but the optic i used doesn’t work out too well with this LED
I have another optic to try out in it (cheap Led Lenser like TIR) which seems to do a better job.
It’s a stock LD25 because even the WindyFire 14500 sags a lot (too much to my liking) above 3 Amperes.
(I put the driver in there up side down and stuck a small Omten on the empty side of the board.)
Not sure yet what i’m gonna do with the 3rd White Flat 1mm² i got.

Your linked resistors are 0.25 Watt, mine are 1 Watt (according to the listing).
0.25 Watt is probably enough, but i felt better about getting 1 Watt.

pc_light
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Curios whether anyone with the same OP driver from Fasttech allows setting of output current as indicated in the video?

I decided to give the driver a try but the copy I have does not respond to taps or hold adjustments at all.

The L-M-H modes (and double-click strobe) all work as indicated. The current readings for mine are 0.09A, 0.91A and 1.7A (the lower High probably due battery being used). Regardless, I can’t get any adjustment activity when comnecting the set pad (tiny pad with hole in middle) to ground ring.

I wonder if the one from FT is different from the ones direct from Simon/Convoy even though they look similar on the outside?

Seeking the light.

deus1ex
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For me, the same problem, they can not be set. I ordered 2 pieces from Fasttech a month ago. I’ll order one from Convoy and then test it.

Barkuti
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pc_light and deus1ex, my last two LD-25s from FastTech were ordered on November 15th and shipped Nov 24th. I used one of those for a custom 219B build and the current output adjustment worked fine.

pc_light, only 1,7A? Your current path was sub-optimal. 

Please be aware that physical connections to the driver with alligator clamps and such have a lot of resistance, you'll need to raise the input voltage more than you may believe for it to behave, namely when adjusting high mode. Two alligator clips plus cable and other contacts easily means 0,3 Ω or more. At 3A this means you need at least a full volt above the minimum required voltage for the driver to pump 3A to the emitter (which could already be 3,6V).

I recommend heatsinking the driver properly first, optimizing the current path to the driver, and raising the input voltage if the stuff misbehaves. Even more I said. A lot.

 

Cheers Party 

The Light Innocent I am

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pc_light
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Thanks deux1ex, looking forward to your results.

Barkuti wrote:
pc_light  and deus1ex, my last two LD-25s from FastTech were ordered on November 15th and shipped Nov 24th. I used one of those for a custom 219B build and the current output adjustment worked fine.
FWIW, mine was ordered from FT on 21-Jan.

Barkuti wrote:
pc_light, only 1,7A? Your current path was sub-optimal.
Thanks for the ideas Barkuti.

Yeah, I was setting on my testing rig which was using a 14500 cell, probably only capable of delivering less than 3A. But the voltage is 4.0V (open load) when I checked just now.

I’m happy with High, I was actually trying to lower the Low and perhaps Med; I’ll try again with a high-drain 18650 battery just to confirm.

Seeking the light.

pc_light
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Follow-up -

In subsequent testing of the board with a high-drain 18650 for whatever reason, it died. Sad

It wasn’t running at the time it died, it was simply working one time, then when I disconnected and reconnected, it simply wouldn’t light. The led will run direct drive if I bypass and connect battery to driver LED neg, so it’s a failure somewhere between ground ring and required circuit.

I decided to take a close-up look at the driver board to check for obvious diconnects and I must admit it’s filthy. Little solder balls scattered everywhere. May or may not be related to the failure but not a good sign. I’m going to write this driver off and look elsewhere.

Seeking the light.

el Capitan
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What is the package size of the R010 sense resistor?

And after changing the output on a given mode, does it permanently stay at that set point forever?

Barkuti
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el Capitan wrote:
What is the package size of the R010 sense resistor?

1206 imperial.

el Capitan wrote:

And after changing the output on a given mode, does it permanently stay at that set point forever?

Yes.

With the standard R010 sense resistor I wouldn't go much below 30mA or “1%”, or it may result in an intermitently unseen low mode.

 

The Light Innocent I am

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el Capitan
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Thank you Barkuti Thumbs Up

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