First of all, although I couldn't find any similar question(s), excuse me if one has been asked before.
I want to make an LED driver for 2 different LED strips. One needs about 45 VDC and the other needs about 54 VDC. The manufacturer recommends using 150 mA constant-current driver.
So I'll make a single driver operating from 18-32 VDC for driving both. Note that only one of them will be driven at a time, not both at the same time.
Anyway, I have an LM2577 on hand and I want to use it as a constant current driver despite it is a voltage regulator. Of course there are many ICs on the market for this purpose, but I want to use this IC if possible. So here's my concept design:
Since the IC will keep the FB pin at 1.23VDC, I think the strip will be driven with a constant current of 1.23V / 8R2 = 0.15A.
Will this work? Is there anything wrong with this? Any disadvantages or potential faults? Needs any improvements?