This part is a kind of semiconductor called GR8874.

Function of this product has Green Mode PWM Controller.

Manufacturers : grenergy

Image and pinout :

Some of the text within the PDF file :

GR8874 Green-Mode PWM Controller with Integrated Protections Features High-voltage (500V) startup circuit Standby 100mW solution Current mode PWM Very low startup current (<20uA) Under-voltage lockout (UVLO) Non-audible-noise green-mode control Programmable switching frequency Cycle-by-cycle peak current limiting Internal leading-edge blanking Internal slope compensation Internal 4ms soft start (Fs = 65KHz) Gate output voltage clamp Soft driving for reducing EMI Over-voltage protection (OVP) on Vcc pin Over-load protection (OLP) 500mA driving capability Applications Open-frame SMPS ● Switching AC/DC adapter Description The GR8874 is a highly-integrated, low startup current, current mode PWM controller with green-mode function and high-voltage start up circuit. A high-voltage current [ ... ]

GR8874 PDF Datasheet Download