Iāve seen this style of marking a number of times before, it took me ages to find out who makes them. 
Itās a Torex XC9104.
The parallel 8205S and rather small inductor certainly help its current capabilities but efficiency probably sucks. Iām a bit skeptical about that ā800mAā.
Iād really love to see an output/runtime graph on Highā¦
Nice find !! I have watched many small boost IC datasheets but couldn't find one that was totally fiting !
I am somewhat short of time at work right now but i hope to be able to take this driver to the bench soon and see what it can do
So now we only miss the MCU ... i have seen that "gnd at pin 8" on some cheap driver's picture already but don't know that kind of IC well enough to guess what it could be. Idea anyone ?
Could be one of the countless 8-bitters that Holtek makes. Cheap and generic. Iāve found quite a few that have GND on pin8 but pin3 would be reset I assumeā¦ no luck so far. Maybe a PIC12Fxxx or a clone, VDD and GND match too.
Does it really matter though? Itās going to be far easier to shoehorn in an Attiny.
Thumbs up for a link to the boost controller, Iām pretty sure I hadnāt seen that one.
Iām interested to see some performance values of the driver. Iāll buy me a pair of T2 at Fasttech, 12.47$ ā5% BLF code = 11.85$ ist the best offer around. Banggood, Gearbest, all more expensive despite some code offers.
In the meantime, I need 2 measurements: The outer diameter of the driver (roughly to 1/10 of a mm) and the inner diameter of the retaining ring.
Much obliged.
Iām already tweaking my Oshpark boost drivers for the T2, Iām pretty sure Iāll build them myself as Iām not that fond of shoehorning MCUsā¦ any more
PCB OD : 17.1mm
Retaining ring ID : 14.7mm
Schematic updated, links and dimensions added
Thanks a lot! 
Trying to measure the current drained from the battery whith an ampmeter did some very weird things at max brightness. I guess that the voltage loss in the measurement shunt was too high and made the driver to enter a very fast ON-OFF loop.
So i measured the voltage across a (very) low R shunt and got 3A max with a freshly charged eneloop.
Changed the 0.2 ohms limiting resistor in the driver of a second T2 (stupid me who didn't think of measuring this one before modification for reference !) for a 0.5 ohms, got about 2A max and then 1 ohm wich was 1A max
Lux measurments are from a calibrated Minolta T-10A using a 20cm polystyrene foam ball setup according to Djozz's "fast and cheap integrating sphere". As i don't have a calibrating light for now i have no good way to convert from lux to lumen but a Convoy S2+ with xm-l2 T6-4C at 1.4A (4*7135) in mid (40%) mode (should be about 200lm ?) reads 924 lux with the same setup.
| T2-a 0R2 | T2-b 0R5 | T2-b 1R0 | ||||
| A | Lux | A | Lux | A | Lux | |
| Low | 0.023 | 13 | / | 11 | 0.014 | 8.6 |
| Mid | 0.260 | 152 | / | 113 | 0.133 | 86 |
| High | 3.0 | 1150 | 2.0 | 848 | 1.05 | 585 |
Anybody got any idea as to when this will start being sold at the Convoy store?
You mean T2 ?
You can buy T2 from Convoy store on aliexpress since the mid august iirc (mine was from a 08/29 order)
Iād never seen it before there, and it sure is. Cool beans, getting that (alongside an S2+) ASAP.
Get the T2 from their Taobao store instead. ę·å®ē½ - ę·ļ¼ęåę¬¢
Taobao Description:
(2) Low voltage protection: When the battery voltage is between 2.9 and 3.1V, the flashlight will alarm, showing a weak brightness with 2 flashes per second.
(3) Reverse battery protection: the battery will not light up, but there will be no abnormalities, no need to worry about burning the battery or circuit
It has low voltage protection and reverse battery protection while the one on Aliexpress store doesnāt have them. Pretty disappointing as the Aliexpress store is direct from Convoy. Anyone contacted Simon about this?
Thanks, but nope, donāt intend on getting it from TaoBao, even because I donāt have 14500 cells to toss in it so the LVP is moot and I donāt think they even ship to my country. If anything, Iāll wait for Simon to have his stock updated/upgraded.
Oh shoot, 774Hz PMW freq. What theā¦ā¦
Got 2x Convoy T2 from Fasttech. Iām very pleased.
The moment I held one in my hand I thought:
Really nice look and feel. Iām a sucker for the S2+, and this is absolutely its little brother.
Greatest asset is that a driver of 17mm does fit. Makes DIY much easier, and the trade-off of a slightly larger diameter is really insignificant.
Lineup:
From left to right
SK68 clone, Ultrafire SK58, Convoy T2 (/w clip + sling), Thorfire TG06, Uniquefire G10, Utorch UT01, Convoy T2, Manker T01, Thrunite Archer 1A
Stock mode spacing is already really good, waaaaaay much better than most, especially the expensive AA lights. But doubleclick-to-strobe and PWM are a downside. Leaves room for improvement.
Got my Convoy T2 last week. Havenāt had much time to play with it. First impression, big and heavy for a AA only
If you like the smaller lights, I recently took delivery of a batch of small Sofirn lights - SF10, SF12, SF14v2.0 & SP10v2.0. The SP10 comes in black, red and blue.
I really like Sofirn lights, but not the AA ones so much.
Speaking of size, their 3 clicky lights (SF10, SF12, SF14) are all larger than the T2.
And the SP10 is a momentary light (that comparison would really be apples and oranges) more in the ballpark of the UT01. I eyed the SP10 for some time, but refrained because of the donāt-drop-it-or-itās-broken problem. And itās much more difficult to mod them. Most lights I buy, I see them as hosts, which happen to have stuff insideā¦
Oh, and color, the Sofirn red is too pink for me. The Convoy red is good. Not as nice as the Maglite red, but good. Iād take blue and green as wellā¦
Anyone know the size of the led mcpcb?
Sorry to dig up an old thread, but I was poking around about the driver in the T2 and ran across this. Great schematic!
And yeah, thatās PIC-like layout, not compatible with our usual attinyās. But the new ones (attiny412) would work, as long as you donāt mind the new architecture. The one downside I seeā¦ no provision for voltage readings via a voltage divider. And since the voltage coming into the MCU is boosted, internal vref readings are out of the question. So no driver-based LVP? Hmmā¦ at least itās a 17mm driver.
There doesnāt seem to be a dedicated Convoy T2 thread, so I might as well post here, since this thread is driver focused.
It seems there is a new driver for the T2, and both the old and the new version are currently available.
Original T2 listing, XP-G2
Original T2 Driver, AA only, 3 mode
Updated T2 listing, XP-G2 or Nichia 219C
Updated T2 Driver, AA or 14500, 4 mode
There are a few additional details about the new driver shared in the Convoy general discussion thread starting at post 2340.
Whoa. I wasnāt aware this light even existed. Looks nice, but that clip gots ta go. It needs to be a deep-carry clip, especially for a short light like an AA/14500.
At least itās not a chromy silver afterthought-clipā¦
The 4-mode driver looks nice if in fact it removed blinkies.