This part is a kind of semiconductor called AP8269.

Function of this product has PWM CONTROLLER.

Manufacturers : AiT Semiconductor

Image and pinout :

Some of the text within the PDF file :

AiT Semiconductor Inc. www.ait-ic.com AP8269 PWM CONTROLLER GREEN MODE DESCRIPTION The AP8269 is available in SOP8 and DIP8 Packages. ORDERING INFORMATION Package Type Part Number SOP8 AP8269M8R M8 AP8269M8VR DIP8 AP8269P8U P8 AP8269P8VU R: Tape & Reel Note U: Tube Package V: Green Package AiT provides all Pb free products Suffix “ V “ means Green Package TYPICAL APPLICATION FEATURES  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 [ ... ]

AP8269 PDF Datasheet Download