This part is a kind of semiconductor called PKS607Y.

Function of this product has (PKS603 - PKS607) Off-Line Switcher IC.

Manufacturers : Power Integrations

Image and pinout :

Some of the text within the PDF file :

PKS603-607 PeakSwitch™ Family Product Highlights EcoSmart – Extremely Energy-Efficient • Standby output power ≥0.6 W for 1 W input (high line) • Sleep mode power ≥2.4 W at 3 W input (high line) • No-load consumption <200 mW at 265 VAC input • Surpasses California Energy Commission (CEC), ENERGY STAR, and EU requirements PeakSwitch Features Reduce System Cost • Delivers peak power of up to three times maximum continuous output power • 277 kHz operation during peak power significantly reduces transformer size • Programmable smart AC line sensing provides latching shutdown during short circuit, overload and open loop faults, and prevents glitches during power down or brownout • Two external components reset latch on AC removal • Adaptive switching cycle on- [ ... ]

PKS607Y PDF Datasheet Download