This part is a kind of semiconductor called TNY175PN.

Function of this product has (TNY174 - TNY180) Offline Switcher.

Manufacturers : Power Integrations

Image and pinout :

Some of the text within the PDF file :

TNY174-180 ® TinySwitch-LT Family Energy Efficient, Offline Switcher with Enhanced Flexibility and Extended Power Range Product Highlights Lowest System Cost with Enhanced Flexibility • 650 V rating optimized for non-active PFC applications • Simple ON/OFF control, no loop compensation needed • Selectable current limit through BP/M capacitor value - Higher current limit extends peak power or, in open frame applications, maximum continuous power - Lower current limit improves efficiency in enclosed adapters/chargers - Allows optimum TinySwitch-LT choice by swapping devices with no other circuit redesign • Tight I2f parameter tolerance reduces system cost - Maximizes MOSFET and magnetics power delivery - Minimizes max overload power, reducing cost of transfor [ ... ]

TNY175PN PDF Datasheet Download