Hello Simon,
Can you confirm battery tube diameter for L21A? Is it 22mm or just 21.5mm?
Hello Simon,
Can you confirm battery tube diameter for L21A? Is it 22mm or just 21.5mm?
I just measured and the inner diameter is 21.9mm which is mostly likely 22
96% efficiency, little heat generation
Any update on Convoy STB 90.2? What amp driver will this be paired with?
I want to compete with Noctigon K1 which costs $139.99.
18A for SBT90.2
the host is in production
Hello Simon,
Can you confirm battery tube diameter for L21A? Is it 22mm or just 21.5mm?
Some are 21.5mm ,some are 22mm
adam7027:Hello Simon,
Can you confirm battery tube diameter for L21A? Is it 22mm or just 21.5mm?
Some are 21.5mm ,some are 22mm
Can I specifically ask for 22mm, if I make an order?
I would also ask another request:
Could you please make a new item in the store? Which is same to this: 40.38€ |Convoy L21A mit luminus sst40, kupfer DTP bord und ar beschichtete innen, Temperatur schutz management, bis zu 2300lm|Taschenlampen| - AliExpress , but with these differences:
- emitter choices should be: Samsung LH351D 5700K, 5000K, 4000K
Tater Tot: id30209: Tater Tot:Would this 8A driver be good for driving low forward voltage LEDs like SST-20DR?
Quit opposite…
I was thinking of 3x SST-20DR or 3x XP-G3 Photo Red on Convoy S12 with this driver.
Since it is a buck driver, it should create less heat than linear FET or AMC7135s?
96% efficiency, little heat generation
Yes, but the SST-20 DR has a very low forward voltage which you need to use a special driver. If you use this driver it’ll burn through most of the battery voltage very quickly to run more efficiently at a lower voltage.
Yes, but the SST-20 DR has a very low forward voltage which you need to use a special driver. If you use this driver it’ll burn through most of the battery voltage very quickly to run more efficiently at a lower voltage.
If it’s actually an 8A buck driver the excess voltage is not wasted. However, a true 8A buck driver will require a very large inductor and probably be quite expensive compared to most Convoy drivers so I wonder if something is lost in translation here…
Okay, I’m not really familiar with a buck driver. There’s a thread all about the different types, I should go have a read up
Okay, I’m not really familiar with a buck driver. There’s a thread all about the different types, I should go have a read up
The short answer is:
buck driver turns excess voltage into current
boost driver turns excess current into voltage
If it’s actually an 8A buck driver the excess voltage is not wasted. However, a true 8A buck driver will require a very large inductor and probably be quite expensive compared to most Convoy drivers so I wonder if something is lost in translation here…
The 8A driver does seem to have an inductor but is it big enough?
It is also around 2x more expensive compared to linear FET or 7135 drivers.
Edit: I just remembered that I asked him about this a month ago.
Tater Tot:So it is a Buck driver?
Or is it buck-boost?
For more information, I need to consult the driver manufacturer.
Tater Tot:Any updates on this driver?
It is a buck constant current drive,
I have always wondered about that red stuff or other color on top of those components on drivers.
Looks like spaghetti or pizza sauce.
What function does it have?
Good question.
I'd like to know as well.
I have always wondered about that red stuff or other color on top of those components on drivers. What function does it have?
I think it’s conformal coating.
Didn’t realize it was already available. Yes it does look like a buck driver.
Considering it’s only on and around the inductor I would guess it’s to reduce high pitched noise they can sometimes have. “Coil whine”
Didn’t realize it was already available. Yes it does look like a buck driver. Considering it’s only on and around the inductor I would guess it’s to reduce high pitched noise they can sometimes have. “Coil whine”
In convoy XHP35 12V boost driver is really quiet unlike the switch...
That red goo is actually glue that holds components while soldering .
A few things landed and tested from Convoy, all really excellent thanks Simon!
L21A XHP35 HI 4000k : Really nice quality. Light is strong and pleasant.
S2+ with W2 Green : This is so much fun, it gets hot on high Great power to weight ratio. Decent throw and spill.
Upgrades for C8: LH351D 5000k and OP Reflector. Such an awesome upgrade for my C8. Sliced the dome and it has decent throw, really nice color, noticeably warmer than 5000k, really awesome all rounder now!
Simon Mao: adam7027:Hello Simon,
Can you confirm battery tube diameter for L21A? Is it 22mm or just 21.5mm?
Some are 21.5mm ,some are 22mm
Can I specifically ask for 22mm, if I make an order?
I would also ask another request:
Could you please make a new item in the store? Which is same to this: 40.38€ |Convoy L21A mit luminus sst40, kupfer DTP bord und ar beschichtete innen, Temperatur schutz management, bis zu 2300lm|Taschenlampen| - AliExpress , but with these differences:
- emitter choices should be: Samsung LH351D 5700K, 5000K, 4000K
- driver max current: 5A (but other driver specifications are the same)
only 22mm 6A driver for L21A ,the current is too large for LH351D
only 22mm 6A driver for L21A ,the current is too large for LH351D
Bad news for me :cry:
Apart from this, you mentioned, that a few of your latest driver are now buck-boost (very efficient, i saw you mention 96%, and no PWM at all). What are your current drivers, which work like these?
Simon Mao:only 22mm 6A driver for L21A ,the current is too large for LH351D
Bad news for me :cry:
Apart from this, you mentioned, that a few of your latest driver are now buck-boost (very efficient, i saw you mention 96%, and no PWM at all). What are your current drivers, which work like these?
Currently only this driver has such a high efficiency,
Simon, any new info about lh351d 2700k and 3500k both cri90? Can you get them?
Also have you thought about making a 2.5A driver (like for CSLNM1.23) but with 12 groups and/or 4 modes?
This would be a good option for those who don’t want s2+ hotrods with 5A drivers.
I know you have 2.8A drivers with AMCs, but consider this suggestion too.