This part is a kind of semiconductor called CR6224.

Function of this product has (CR6221 - CR6229) Green-Power Current Mode PWM Power Switch.

Manufacturers : Chip-Rail

Image and pinout :

Some of the text within the PDF file :

CR622X—CR6221/6224/6228/6229 Green-Power Current Mode PWM Power Switch Feature z z z z z z z z Power on Soft Start Reducing MOSFET Vds Stress Frequency shuffling for EMI Burst Mode Control For Improved Efficiency and Minimum Standby power Design Audio Noise Free Operation Normal 50 KHz Switching Frequency Internal Synchronized Slope Compensation Low VDD Startup Current and Low Operating Current Leading Edge Blanking on Current Sense Input z z Pb-Free SOP-8L& DIP-8L Good Protection Coverage With Auto Self-Recovery ¾ VDD Over Voltage Clamp and Under Voltage Lockout with Hysteresis (UVLO) ¾ Line Input Compensated Cycle-by-Cycle Over-current Threshold Setting For Constant Output Power Limiting Over Universal Input Voltage Range ¾ Overload Protection (OLP) ¾ Over Voltage Protection (OVP) [ ... ]

CR6224 PDF Datasheet Download