This is one of the semiconductor types. This part name is CYT3000B.
This product has High power factor linear constant current LED chip functions.
Manufacturers of product is EgoLL.
CYT3000B PDF Datasheet
Some of the text files within the PDF file
CYT3000B is a high power factor linear constant current high voltage LED driver chip, used in the field of LED lighting. The chip passes Unique constant current control patented technology to achieve constant current accuracy of less than ± 5%, the output current can be adjusted by an external resistor RCS.
The chip has high power factor and low harmonic distortion. The CYT3000B has the function of automatically adjusting the output current with temperature. When the temperature is too high the system will reduce the output current to reach To reduce the temperature effect, the temperature protection point can be set by the external resistor on the pin RTH terminal. [ … ]
Please refer to the file for details.