I have a small LED lighting project and I plan to use an AL1791 (1-channel) LED driver.
Due to limited size, I will only use about 4 LEDs. Each LED has 2.2 V Vf.
My power source is 24 VDC.
Can an AL1791 drive just 4 LEDs in series, or does it have to be 10 LEDs in series (24 VDC/2.2 Vf)?