It depends on the FET's gate characteristics. The SUD70N02-03P & AOD510 have been tested and proven to work with the Nanjg-compatible firmware & hardware. Other FETs have not. Using them hacker-style like this you can't always predict how they will behave just from what's published in the datasheets.
About 2 years ago I got my first HD2010, it was a Fandyfire from LightsCastle.
I did a review of it then and it measured 3.8 amps on a 26650, however I had not hardwired my VOM at that time or braided the driver spring.
After doing both of those things, the light pulls just over 5 amps on a good battery. Still does it to this day.
Now 2 years later, I have 1 Ultrafire HD2010 and 2 Tangsfire HD2010’s and none of them pull the amps of the Fandy.
All the newer East-092 drivers seem to have less balls than the old ones.
The only exception to this is the Tangsfire C8 XM-L2 from Tmart from the beginning of this year which will pull over 5 amps With the XM-L2 which is said to be harder to drive than an old XM-L T6.
So that begs the question, where did they source that driver and can it be sourced for individual sale?
Later,
Keith
When I got mine, I had to try several times to get an HD2010 from Tmart with a “good” EAST-092. I was fortunate that a couple of folks from Tmart used to post here at the time, and I sent the HD2010 back to them at least once, and maybe twice, before I got one that was good.
If I recall, a similar sort of thing happened when FT start selling the “new” EAST-092s (there’s a thread somewhere) where some people got good ones, and some got not so good ones.
I was told that the EAST-092s that I got (the ones I’ve been testing in this thread) were all the “original” “good” ones, and I guess that 3.6+ amps could be considered “good”, but the ones I tried out of the batch I have just don’t seem to go “true” DD on high mode… so I’ve gone ahead and ordered a BLF17DD and some of the FETs from RMM, and will see how that does.
I just went ahead and ord
I finally was able to get one of the drivers to get to the modes, and took some pics of the gate signal on my scope (sorry the scope is so filthy. I had to dig it out of my basement to do these, and haven’t had a chance to clean it up :():
Time scale (20 usecs/div):
Voltage scale (2 volts/div):
Low mode:
Medium mode:
High mode:
I mis-read the high mode earlier. I think that it’s actually more like 2.2V?
I’m not so sure about that… I haven’t done any experiments to prove it, but all the datasheets make it very clear that gate voltage is really critical.
texaspyro makes a good point. What’s the cell voltage under load? If this is a freshly charged 20R I’d expect it to be >2.5v under only a 3A load. Since you’ve got 100% duty cycle you can also just use your DMM to measure the gate voltage in case your scope is crazy…
I can’t remember if it’s a Vishay, but it was the one some of us bought from Ebay during one of the older threads about when FT brought back “an” EAST-092/-092B:
Re. your last question, good timing :). I was just curious, about that, and had measured it a few minutes ago, and got 6.68 amps (triple XP-G2 on Noctigon). This was with only limited optimizing of the cables (it’s a mess, sorry).
Hmm, that’s a lot of thread to fish through. Instead I glanced at the current pics on FT: they show the ON Semi logo. Maybe this FET? I’m not really confident, just a guess.
Anyway doing a ton of additional work here may be a moot point: once you have some AOD510 or Vishay 70N02 or IRFR3711ZTR (or whatever RMM is sending) in hand it’ll be easy to see whether the FET is the hangup. (Which it certainly is :-p)
Yes, I can see the page. The FET does look similar to what FT shows in their current pic. It’s definitely ON Semi. (It’s still quite possible that I’ve linked to the wrong datasheet though.)