TOP256 PDF datasheet can download.
This product has (TOP252 – TOP261) Integrated Off Line Switcher functions.
This is one of the semiconductor types. This part name is TOP256.
Manufacturers of the product is Power Integrations.
Image and pinout :
Some of the text files within the PDF file
TOP252-261 TOPSwitch-HX Family ® Enhanced EcoSmart , Integrated Off-Line Switcher with Advanced Feature Set and Extended Power Range Product Highlights Lower System Cost, Higher Design Flexibility • Multi-mode operation maximizes efﬁciency at all loads • New eSIP-7C package builds on PI’s experience with high power and high reliability packages • Low thermal impedance junction-to-case (2 °C per watt) • Low height is ideal for adapters where space is limited • Simple mounting using a clip to aid low cost manufacturing • No heatsink required up to 35 W using P, G and M packages with universal input voltage and up to 48 W at 230 VAC • Output overvoltage protection (OVP) is user programmable for latching/non-latching shutdown with fast AC reset • Allows both primary and secondary sensing • Line undervoltage (UV) detection prevents turn-off glitches • Line overvoltage (OV) shutdown extends line surge limit • Accurate programmable current lim [ … ]
Please refer to the file for details.