Help identifying part

[ukamak]

Anyone know the partname / maker / datasheet of that component?
It's a green-power PWM controller similar to  SG6848 , LD7535 , OB2262

[fzabkar]

This one is a head scratcher.

FWIW, I notice that CR6853 (not your mystery IC) is compatible with all 3 of your alternative parts:

https://www.quartz1.com/price/PIC/410N0195116.pdf

Compatible with SG6848 (6849) / SG5701/SG5848/LD7535 (7550) / OB2262 (2263)/OB2278（2279)

More ...

https://www.semiee.com/file/backup2/HSMC-H6850.pdf (H6850)
https://file.yizimg.com/937/2008100904504721.pdf (CMD2264)
https://u.dianyuan.com/upload/space/2013/01/24/1359029490-775856.pdf (PL3563 / PL3563A)

To complicate matters even further, I notice that the Pb-free versions of the LD7535 and LD7535A have a leading character which looks like a logo, but which is actually an embossed year code:

https://www.google.com/search?q=ld7535+OR+ld7535A&tbm=isch

https://file.remont-aud.net/baza/ic_power/sm_data/LD7535_data.pdf (datasheet)

I suspect that your PWM controller may be a popular part which has been copied by many manufacturers. That seems to be what happens in China.