This part is a kind of semiconductor called FP5001.
Function of this product has PWM CONTROL IC.
Manufacturers : Feeling Technology
Image and pinout :

Some of the text within the PDF file :
Technology GENERAL DESCRIPTION FP5001 PWM CONTROL IC WITH SCP/DTC FUNCTION The FP5001, a 1-chi p co mposed of o pen collector tran sistor o utput pulse-wi dth-modulation control circuits with an error amplifier and dead-time comparators (DTC), the FP5001 contains a 1.0V precision voltage reference regulator, under-voltage lockout circuit (UVLO), short circuit protection circuit (SCP), applied to offer space and low cost in many applications such as the DC/DC converter and backlight inverter. Using few external components, FP5001, a high performance integrated IC, is designed for a control circuit. The circuit diagram of the typical application example is as below. FEATURES Reference Voltage Precision: 2% Output sink current up to 100mA Low quiescent supply current Wide operating voltage [ ... ]
FP5001 PDF Datasheet Download
