This part is a kind of semiconductor called 44608P40.

Function of this product has MC44608.

Manufacturers : ON Semiconductor

Image and pinout :

Some of the text within the PDF file :

MC44608 Few External Components Reliable and Flexible GreenLine ™ Very High Voltage PWM Controller The MC44608 is a high performance voltage mode controller designed for off–line converters. This high voltage circuit that integrates the start–up current source and the oscillator capacitor, requires few external components while offering a high flexibility and reliability. The device also features a very high efficiency stand–by management consisting of an effective Pulsed Mode operation. This technique enables the reduction of the stand–by power consumption to approximately 1W while delivering 300mW in a 150W SMPS. • Integrated Start–Up Current Source • Lossless Off–Line Start–Up • Direct Off–Line Operation • Fast Start–Up General Features h [ ... ]

44608P40 PDF Datasheet Download