This part is a kind of semiconductor called SDC606.

Function of this product has Current Mode PWM Controller.

Manufacturers : SDC

Image and pinout :

Some of the text within the PDF file :

Datasheet Current Mode PWM Controller General Description SDC606 is a high-performance current mode control IC designed for AC/DC convertor, which supplies about continuous 12W output power at the universal AC input range from 85V to 265V. SDC606 Features        Built-in oscillator Built-in high voltage power transistor of 700V High voltage start-up Very low start-up and operating current Low standby power consumption Protections: OVP, UVLO, SCP, OLP and OTP Built-in high precise current limit with temperature compensation 12W and peak 15W output power at the universal AC input range 15W and peak 18W output power at AC input 220V Very few external components Package: DIP-8     Applications    Portable rechargeable power supply Appliance contr [ ... ]

SDC606 PDF Datasheet Download