I will explain smooth ramping from moonlight up to Turbo. Let’s assume you set the top of ramp to Turbo so smooth ramping goes the full range of brightness. (BTW, this is how all the Texas Avenger based drivers work)
This MF01 mini has 3 channels. 1x6xFET
Channel 1 is a single 7135 chip (can provide up to .35A)
Channel 2 has six 7135 chips (can provide up to 2.1A)
Channel 3 is FET. (can provide well over 30A, other components will limit it.)
So at moonlight ch 1 uses a very low PWM signal, 1% maybe, to create very low output. This PWM signal gets higher as we ramp up. At 100% PWM duty cycle on ch 1 the single 7135 chip puts out .35A or 350mA.
As we continue to ramp up, ch 1 stays at 100% and ch 2 will be added in at a very low duty cycle (a few percent to make a smooth tint transition).
As brightness increases ch 2 continues to go higher in it’s duty cycle. When it gets to 100, ch 3 (the FET) will start adding in more current at a few percent duty cycle. At this point ch 1 and 2 both stay at 100 and the FET will climb up in duty cycle to 99%.
Only at 100% (TURBO) do ch 1 and 2 turn off. There is a small performance increase by turning off the other channels.
The reason the lower channels stay at 100% is to have a smooth transition as far as tint is concerned. For example, on a stock light with 7 steps, step 6 is a regulated 2.4A (total of seven 7135 chips running at 100% PWM duty cycle). If step 7 were to turn off ch 1 and 2 and make the FET do 5A, you would see a big tint shift. It would be even more noticable with smooth ramping as the tint would suddenly shift at the 2.4A to 2.45 range. People would complain.
With 3 channels there are 3 distinct tints.
Channel 1 has the tint of .35A. Toykeeper says the tint doesnt change due to the small range of current.
Channel 2 has the tint of 2.4A which changes a small amount due to the brightness change.
Then the FET has a tint of 15-17A which changes a small amount due to the brightness change.
So to smooth the transitions from each channel the ch 1 7135 chip stays turned on at 100% as ch 2 starts adding power and all seven 7135 chips stay at 100% as the FET starts adding power. This helps the different tints to more slowly be combined and look nicer to the eye.
To answer your last question, level 7 is not fully regulated. Only levels 6 and below are fully regulated.