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I received chips different from chips that I ordered. Already asked for refund.
But I am curious what these chips actually do. I searched several SMD code books, but had no luck. Does anybody have any clue what they could be?

It's SOT-23-6, Marking code 63M09. enter image description here

I have ordered battery ballancer ICs HY2213-BB3A.
But I do not think the chips I received are just some clones, because I measured no diode drop across pins 2-3 (there should be a diode internally). So I assume those are completely different chips.

Chupacabras
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1 Answers1

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I probably found a good candidate.
I googled and found some strange page which is referring "63M09" and "OB2263MP". So it could be OB2263MP (Current Mode PWM Controller).
It's SOT-23-6, and I measured some diode drops and resistances across certain pins and measured values agree with internal schematic of this chip. So it is pretty much this chip. I am not 100% sure, I would have to test that chip in some circuit to be 100% sure.

Chupacabras
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