This part is a kind of semiconductor called AP4310E.

Function of this product has DUAL OP AMP AND VOLTAGE REFERENCE.

Manufacturers : Diodes

Image and pinout :

Some of the text within the PDF file :

A Product Line of Diodes Incorporated AP4310E DUAL OP AMP AND VOLTAGE REFERENCE Description The AP4310E is a monolithic IC specifically designed to regulate the output current and voltage levels of switching battery chargers and power supplies Pin Assignments (Top View) The device contains two Op Amps and a 2.5V precision shunt voltage reference. Op Amp 1 is designed for voltage control with its noninverting input internally connected to the output of the shunt regulator. Op Amp 2 is for current control with both inputs uncommitted. The IC offers the power converter designer a control solution that features increased precision with a corresponding reduction in system complexity and cost. AP4310E has more stringent reference voltage tolerance and offset. The AP4310E is available in stand [ ... ]

AP4310E PDF Datasheet Download