This part is a kind of semiconductor called CR6850C.

Function of this product has Novel Low Cost Green-Power PWM Controller.

Manufacturers : Chip-Rail

Image and pinout :

Some of the text within the PDF file :

CR6850C Novel Low Cost Green-Power PWM Controller Features Low Cost, PWM&PFM&CRM (Cycle Reset Mode) Low Start-up Current (about 8µA) Low Operating Current (about 2mA) Current Mode Operation Under Voltage Lockout (UVLO) Built-in Synchronized Slope Compensation Programmable PWM Frequency Audio Noise Free Operation Leading edge Blanking on Sense input Constant output power limiting for universal AC input Cycle-by-cycle current limiting Soft clamped gate output voltage 16.8V Over voltage protect 25.5V High-Voltage CMOS Process with ESD SOT-23-6L、SOP8 & DIP-8 Pb-Free Packaging Compatible with SG5701 & SG5848 & LD7535 & OB2262/63 Applications Switching AC/DC Adaptor Battery Charger Open Frame Switching Power Supply 384X Replacement General Description The CR6850C is a highly integrated [ ... ]

CR6850C PDF Datasheet Download