This is one of the semiconductor types. This part name is SM2082D.
This product has Single-channel constant current LED driver controller chip functions.
Manufacturers of product is Linkage.
Image and pinout :
SM2082D PDF Datasheet
Some of the text files within the PDF file
SM2082D is a single-channel LED constant current drive control chip, the chip using the Division patent The constant current setting and control technology, the output current is set by the external Rext resistor 5mA ~ 60mA, and the output current does not change with the chip OUT port voltage, better constant current performance. The system structure is simple, the external components are few, the program cost is low. [ … ]
Please refer to the file for details.