I think this is the first time I've come across this particular chip (YX8183).
It is designed for solar lights that use a lithium cell, either standard or LiFePO4, and has built in LED current control.
https://www.youtube.com/watch?v=-_SDR1f99Yw
Circuitmike
2023-03-29 14:57:22 +0000 UTCMiek Buchanan
2023-03-28 06:34:15 +0000 UTC