This part is a kind of semiconductor called STR-W6750.

Function of this product has Off-Line Quasi-Resonant Switching Regulators.

Manufacturers : Sanken electric

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Some of the text within the PDF file :

STR-W6700 ■ General Descriptions Series Power IC for Quasi-Resonant Type Switching Power Supply with High Efficiency and Low Noise in Full Load Range The STR-W6700 series products are power ICs for quasi-resonant type switching power supplies, incorporating a power MOSFET and a controller IC, The product achieves high www.net efficiency and low noise power supply systems by the quasi-resonant operation and the bottom-skip quasi-resonant operation. The STR-X6700 series products are the different package (TO-3PF) versions. ■ Features Multi-Mode Control The operation mode switching with three steps according to load conditions achieves the TO-220F-6 optimal high efficiency and low noise power supply systems across the full load range. (The confirmation of product number is [ ... ]

STR-W6750 PDF Datasheet Download