This part is a kind of semiconductor called MP2A5077.

Function of this product has M-Power 2A.

Manufacturers : Fuji

Image and pinout :

Some of the text within the PDF file :

Quality is our message M-Power 2A MP2ASeries Application Note (Ver.1.1) Ver.1.1 2007.01.12 MT5F18467 -1- Quality is our message Contents 1. Outline 2. Features 3. Line up 4. Description of the multi-oscillated current resonant circuit 4 – 1. Basic circuit configuration and operation 5. Description of M-Power 2A 5 – 1. Block diagram 5 – 2. External drawing 5 – 3. Description of pin functions 5 – 4. Circuit block descriptions ・ Power supply control voltage ・ Q1 pulse width control circuit ・ MOSFET drive, dead time ・ Protection functions and latched shutdown 5 – 5. Internal structure 6. Design advices 6 – 1. Setting resonant conditions 6 – 2. Startup circuit, VCC winding circuit and maintaining a latched shutdown 6 – 3. [ ... ]

MP2A5077 PDF Datasheet Download