[Canceled] Sofirn SP70 BLF Edition

I saw a BLF-Sofirn Sp70 Flashlight posted in Aliexpress store. it is already released?

All well and good but it better become available in the Amazon store. If I have to wait months for shipping I'll pass.

@Chinaheart Can you provide a link please? I did not find anything on Aliexpress…

Can you please provide a link? I cant find a BLF version of the SP70 anywhere on Aliexpress.

A while back I remember seeing an SP70 on their Aliexpress store that was labeled as “BLF” but it was just the standard SP70 with the Sofirn 6 mode/ramping UI. I don’t see it on there anymore though.

It’s the same light they have always had, they just ditched the BLF

so they wont do a blf version then?

https://sofirn.aliexpress.com/store/2933049

Hi FlashPilot... here it is

https://sofirn.aliexpress.com/store/2933049

That’s just the store link

It still shows the OPR.

Had posted about that and deleted my post cause mixed up reflector types. Just in case anyone wonders what that was about.

OK, the home page shows a banner, out dated banner, but still a banner saying BLF-Sofirn SP70 which we know doesn't exist.

Really looking forward to this release

Thanks for the clarification. :+1:

I think this one might fit nicely for SBT90.2 ? what dha yee think?

Not really. You can run a 3v driver with a single 26650 and a spacer, but that’s not a lot of power and your wasting space.

You can run a buck driver and 2 batteries but I dont think there is a driver powerful enough to really push it hard.

So not a good design form for a high power 3v led.

Need some info on the SP70 driver, anyone know the input voltage range?

More specifically will it run the xhp70.2 from 4.2v or 12v?

EDIT: I found the answer to ^ this^ from Sofirn in my email: Input voltage: 5.6V-8.4V

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Still wondering what type of driver it is? FET/DD w/zener diode?

Ok, my pictures of the driver are better than Sofirn's:

This is a classic FET design. Using the top pic as a reference, the large part on the left is a FET, one we are familiar with in fact. The bottom right pin of the FET is the FET gate, and you can see connected to that the 2 standard resistors our designs use for the FET gate - one is a low value inline, the other is a high resistor value going to ground.

The 5 leg part on the right is an LDO, to bring down the voltage to ~4V to run the MCU. The 3 leg part on the bottom appears to be another FET for lower power, but it appears to be not used, not connected to the MCU - I'm not sure, would have to trace the circuit myself.

I've seen these kind of dual FET, one hi power - one low power, driver designs before. In fact the Haikelite HK04 is very similar:

This uses 2 high power FET's instead of 1, and the part labeled Q7 near the FET's is the low power FET channel.

Nice work Tom E. :+1:

It’s connected. Look at pin 7 next to the “F1” on the MCU.

The small FET top pin looks to be ground get power through R2. Maybe that’s how they limit output? It’s not very robust looking (R2) so it must only handle very low output levels.

Then the bottom right pin looks to be hot grounded from the vias. (Logical guess) We need a picture of the backside to confirm.

Texas_Ace built a twin FET driver for the Haikelite MT09R. The smaller FET used a whole bank of resistors to limit output. It controlled thousands of lumens. This Sofirn small FET channel looks to control a couple lumen hundred at most.