This part is a kind of semiconductor called STR-A6259H.

Function of this product has Universal-Input 13 W 100 kHz Flyback Switching Regulators.

Manufacturers : Allegro MicroSystems

Image and pinout :

Some of the text within the PDF file :

Sanken Power Devices from Allegro MicroSystems STR-A6259H Universal-Input 13 W 100 kHz Flyback Switching Regulators S Re w it gu chi lat ng ors Soft start and low start-up current; start-up circuit disabled in operation Auto-burst stand-by (intermittent operation) input power <0.1 W at no load Built-in constant-voltage/constant current (CV/CC) Multiple protections: • Pulse-by-pulse overcurrent protection (OCP) • Overload protection (OLP) with auto restart • Latching overvoltage protection (OVP) • Undervoltage lockout (UVLO) with hysteresis • Latching thermal shutdown (TSD) All performance characteristics given are typical values for circuit or system baseline design only and are at the nominal operating voltage and an ambient temperature of +25°C, unless otherwise stated. Data [ ... ]

STR-A6259H PDF Datasheet Download