This part is a kind of semiconductor called AP8269.

Function of this product has Green Mode PWM Controller.

Manufacturers : Chipown

Image and pinout :

Some of the text within the PDF file :

AP8269 Chipown Green Mode PWM Controller Features Applications ● Frequency jitter function to improve EMI performance of power supply ● No-audible-noise green mode Control ● External Programmable PWM Switching Frequency ● Internal Slope Compensation ● Low VCC Startup Current and Low Operating Current ● Leading Edge Blanking ● UVLO ● Gate Max Output Voltage Clamp at 18V ● Overload Protection (OLP) ● Line Compensation Over Current Protection (OCP) ● With or without VCC OVP ● External programmable OTP Offline AC/DC flyback converter for ● Battery Charger ● Power Adaptor ● Set-Top Box Power Supplies ● Open-frame SMPS Package Typical Application Typical Application Circui 8/F, ChuangYuan Building No.21-1 Changjiang Road, Wuxi New Destrict Tel: +86(510)8521 [ ... ]

AP8269 PDF Datasheet Download