Last friday I’ve modded my MF01 mini, as mentioned in post #5, the result is very satisfying, no throtteling down any more in any ramp level (also top ramp) till the host (body) of the light reaches the setted max. temperatur. On max ramp 130 (20 clicks from turbo) it takes about 3 Minutes till it reach the max temp (60°C) and begin slowly to step down.
A level around 1200lm can be kept constantly (@amb t20°C), this makes the light very useble now.
Background of the mod idea:
After reading a comment form Lexel on TLF regarding the heating of the AMCs when not in turbo mode and the bad thermal contact of the driver pcb to the host, it was clear to me why there is such a throttling down after few seconds from max ramp.
So, if the light is operating not in full FET mode (turbo), the AMCs becomes hot very quickly, this heats up the whole driver pcb where the mcu with the temp sensor is located on the backside. Therefore the quick step down in max ramp, when the host is not even at 45°C, the driver pcb with the mcu is already at 60°C.
I replaced this plastic cover:
by one out of aluminum that looks like this:
Here is a link to a drawing, in case someone is intrested: https://imgur.com/jHjj1Xz
and contacted the green marked surfaces with thermal paste:
The Design was very accurately defined, so after fixing this heat sinking cover plate, the gap to the AMCs is 0,1 mm, there is no mechanically contact to the parts of the driver board except the big outer GND-Surface.
Afterwards it looked like this, additionally I used a thin plastic washer for isolating the aluminum cover to the battery plus pole and used a magnet:
After this mod, the AMCs and the GND surface of the driver pcb is very well contacted to transfer the heat to the flashlight body. The Battery tube is now also directly connected to this heat sinking cover plate if it’s screwed together with the head, this was not the case with the plastic cover.
This mod would be even better if the heats sinking cover plate where out of copper and CNC-machined precisely like this. Only the costs are relatively high for a single production.
Here is a link to a drawing, in case someone is intrested: https://imgur.com/dyBRHRq
I hope this mod info is interesting for some and that I could explain it understandably.