Hello guys. I would like to ask a simple question.
I have two adjustable boost converters. One has an explicit MT3608 marking on its underside plus a bigger form factor while the other doesn't (with smaller form factor). However, I was beginning to suspect they have the same chip because they have similar output and input ranges.
And I just found out they bear the same markings on their boost converter chip which say "B6287s". I am planning to use the smaller one for my application and will be designing a component out of it for EagleCAD. As of now I'm using the usual MT3608 you can find online but I find it quite bulky, so quite a no-no there for me.
Are they just the same? Sorry for a noob question. I just wnted to be sure before finalizing the circuit.
MT3608 is just the number of the regulator chip; lots of people are free to put it on a board with various other components, and Chinese vendors are good at that. It'a s pretty simple chip, so there aren't really a lot of different ways to connect it up.
The inductors seem to have significantly different values (4R7 is probably 4.7uH, 220 is probably 22uH)
That's the range that the chip is supposed to work with, according to the datasheet. I'd expect the physically larger inductor to be good for more power.
You guess is as good as anyone's whether the chip and parts are genuine as "as marked."
(I see B6287s is another chip with similar quoted specs, sold by some of the Chinese online vendors. I suspect it's a pin-compatible work-alike for the MT3608; I can't find an actual datasheet.)
Yes, I already tried to research online and everything seems to be written in Chinese. But I suppose it's just a part number of the chip. Anyway, I'll be using the device to power both a low current, 9 volt circuit [attached], with a coupled 20-24 volt buzzer switched using a 2N3904 transistor using the Arduino. Should the smaller kind suffice?
