After facing many problems with MP4470 stability I redesigned everything with MP8675
according to the datasheet MP8675 can sustain 6A and it has overcurrent and overheat protection but when I gradually increase load current to something close or above 3A chip just burns like a fuse (although external mosfet driver continues to work)
I got chips from aliexpress and the only reason why it is happening I can suspect is that they are defective, engineering samples or counterfeit.
But it is extremely strange that anyone would bother counterfeiting this IC.
How I could fix this issue and where to get known good chips?