Pffff! 40€ for a 50A buck driver is a excellent deal actually. No buck converter can do this on the market, even ones for high power applications, especially at only 6V.
What I would really want is a dual channel buck+FET driver pushing 7000-9000 lumens on max buck, then switch to FET above that.
Would be amazing, but I doubt that is even feasible, especially within the constraints of a flashlight driver.
40€ are just the parts for 30A
development and labor add up at least another 40€
on CFT-90 LED 3.7V 40A possible
400W is possible going to 5S battery carrier would add enough voltage overhead for 30A @13.5V XHP-70.s maybe the MF03 becomes a 400W Buck if they choose me to do it
sounds odd but only add about 5.5mm Carrier diameter to fit a 5. cell
I have here very unpleasant measurements of original MT09Rs
used full VTC6s
XHP35 HI NW 4000K 246k stock
with D4 5000K NW from kaidomain 289kcd which is just LED swap 17.5% more output
The CW I have from another person is totally crap measured stock
only 163kcd
I reflowed just half an hour ago the LEDs for this light and need to make drivers
then I can tell final measurements with my driver @7A
I wonder if the Mateminco MT35 is also using red stuff?
It sounds like they’re using red Loctite. Typically you have to use heat in order to get it to soften up. Would applying some heat do any damage to the parks? Maybe it would only damage the O-ring which is replaceable? I assume astrolux has some method of getting it apart when they need to do warranty work.
I guess I got lucky with the MF02 I received, it came off with just 2 hands using rubber BBQ gloves in a padded vice. It fought all the way, and there was some type of thread locker, it wasn’t blue or red, kind of yellow/clear looking. Having 2 Drag Bikes and a Hot Rod Harley I use both Blue and Red Loctite more then the average Joe and I know the look/smell of the stuff very well, this stuff on the MF02 I had was neither?
It might be the way they are Torquing the bezel on, the amount of torque used, initially that makes it soo hard to break, once it was broke loose it still was a beast to thread off.
Here is shown how a XHP70.2 is DD driven I would not recommend it
left original GT calculation;
middle 50mOhm resistor mod pushing the original driver over the rated specs, Input capacitors should be doubled
regulation can break down as the minimum ripple not met with 10uH Inductor,
right my driver with proper sized upgraded parts
New generation of MOSFETs with 1/3 the conduction and half the switching losses,
2.2uH for proper ripple current and less losses on it,
reduced voltage divider to get the sense resistor smaller,
better diode 20A instead 3A
Its possible to push the original to 5 max 6A, but changing R14 to 12kOhms and adding at least 20-30uF input capacitors
I would no go beyond 7A with the LED its not worth it