Sofirn C8 Quick Review

I add some photos of C8A also. It had also spring bypass in driver but like always I over react and made my own thicker too :wink: I don’t remember seeing it in switch spring. BTW: Also in host comes screws to attach led board in place.

C8A Driver

C8A Driver in place

C8A Switch

C8A Led attach with screws

You’re welcome Jason :slight_smile: Thanks vestureofblood :slight_smile:

Jouna, I believe both ThorFire and Sofirn are products from the same OEM with minor aesthetic differences. Examples: Sofirn SF30 and ThorFire TA13, Sofirn SF31 and ThorFire VG15S, etc.

kotobuki, if you are to reflow XP-L2 emitters on that triple you may aswell stack solder another 8-pin SOIC MOSFET on the driver and cream the Emisar D4's output records with the help of a Sony VTC5A or the newer Vapcell INR18650 2000mAh. LoL! :-D

Cheers ^:)

Ok, thanks Barkuti. Sofirn has a factory and CNC machines and Cissy has given me info that they do all of their ledlights by them selves. Maybe they do for Thorfire also. Doesn’t matter to me but knowledge is power :laughing: :wink:

Some more pictures (I did reflow new XPG2 on MPCB):

Sofirn C8F vs Convoy C8:

Swap reflector:

Sofirn C8F spacer:

Test with XP-G2:

:beer:

That’s a pretty good idea, thanks.
:+1:

Yeah but lets avoid dropping another clanger kotobuki, you recently had some that's enough. Lets first make sure what is the lettering over that 8-pin chip and go Google it, can you help? I'll do it anyway once I get my C8T.

Cheers :-)

As your service, sir:

“”9926A”“:http://www.vishay.com/docs/68606/si9926cd.pdf

Cheers :smiley:

Thanks for all the in-depth info and pics! One thing I was wondering, does a Convoy C8 battery tube screw into the C8F head?

Thanks for your idea:

:slight_smile:

Nice! That looks pretty cool all mixed and matched! :slight_smile:

I have a few 9926A dual n-channel MOSFETs lying around, not yet unsoldered off broken powerbank PCBs. These:

Banggood is a bunch of @#$%, I have been forced to view the source code of the page to be able to access the image links. Makes hot linking their stuff pictures much harder, at least if you're using Chrome browser. JavaScript related crap.

Ranting aside, according to @#$% datasheet the 9926A MOSFET features… (edited all of this useless information). This means the combined dual channel resistance won't go much above 20ish mΩ even with a semi-drained cell on a hot flashlight.

Cheers

Originally posted on Fri, 10/06/2017 - 03:36; useless data fix.

User AnhTran has a little Nichia 219C 5000K R9050 sale going on, just saw his last message.

Cheers ^:)

By curiosity; how much amps/ watts does that stack solder add?

Thanks for the review. Tailcap/ switch, very good quality u-shaped tailcap and great switch

You’re most welcome Diego :slight_smile:

Jouna, setting up more 9926A MOSFETs in parallel reduces the overall RDS(ON) and increases continuous current handling accordingly for as long as the heat dissipation also improves proportionally, yet although this is not the case it is with regards to the instantaneous figures and for the continuous to some extent. With two 9926As stacked the driver should be handling 12 - 16A and optimizing the tail switch resistance and losses would be the next in line thing, imho.

Cheers

Whoa :slight_smile: I thought some improvement in output but not quite that much :slight_smile: Thanks though Barkuti :slight_smile: If and when you add that to your C8F do tell about results.

I'm smelling some sort of misunderstanding here, Jouna. Please bear in mind I said the driver should handle 12 - 16A with two 9926A chips (each chip holds two n-channel MOSFETs, thus stacking two means 4 MOSFETs), I say it just because the datasheet suggests up to 8A per chip (with a standard level of cooling we can't guarantee in such small flashlight driver PCB), not because I am predicting you'll get such a crazy amperage. If you're stacking the chips add some thermal paste over the roof of the ones below (and proper soldering, of course).

MOSFET stacking example:

AO4410 over Si4324DY units., drain terminals can be observed at the center. That little solder peak rubbing the peg is from a wire below the MOSFETs.

Cheers ^:)

P.S.: you may want to edit your previous message, I think it's missing a [/quote] thing, Jouna.

XXX-Man seems to be having current draw issues with his C8F. The triple emitter MCPCB is probably not adequate, no direct thermal path. Thermoelectric separation and/or thermoelectric separated (=DTP) copper boards these chinese folks like to say.

Cheers :-)

P.S.: leave those XP-G2s onboard for a while, kotobuki. ;-)