5mOhm driver resistance is accomplished by using 1mOhm sense resistor (nothing special about it), FET adds about 3-3.5mOhm, traces 0.5-1mOhm. LD-2/3/4 design comes from era when XM-L2 and XP-G2 were most popular LEDs, and they both have very high Vf, so driver with lower resistance allowed higher output on max. mode. But there is always trade-off, in this case lower resolution on low currents.
These days basically all good emitters have quite low Vf and there is no need for such low parasitic/internal resistance (that's why my next drivers will have 10mOhm sense resistor for 5Amp driver).
Neven, some time ago I installed one of yours 9A driver on a 14500 flashlight, powering 3x XP-G2 Leds.
It worked fine until some weeks ago, and I just wanted to perceive what may have happened.
What happens now is that it only works with 2 modes, like Moonlight and Turbo, no matter how many times I click, I can’t enter the programming mode.
Could it be some component that “burned” or got damaged, and that originated this inability to have more modes or enter the programming?
BTW, the host is a Jaxman E3 and I am using a forward clicky switch.
What happened to the website? I cannot access led4power.com anymore since some time (weeks, I’d say). The problem might be on my side, but don’t know how to fix it.
"To avoid paying taxes" statement is not true, I'm paying taxes either way, but I can't explain my local bureaucracy and laws in one sentence. Store will be closed probably for another two weeks until new generation of DTP PCBs arrive.
With the LD-x4, when DD mode is enabled in the menu, does DD replace the constant current high mode? Like if I have a 6A driver and am using with a low Vf LED so DD is say 12A, does enabling DD mode mean I don’t have a 6A mode?
I think weird things would happen if you allow both so I see the point but a shortcut like 2 or 3 clicks for DD might be nice for next gen.
Since it’s possible for DD to be the same as CC high due to battery and LED combo it could have 2 identical modes in a row if it worked that way i guess.