This part is a kind of semiconductor called UTCTL494.

Function of this product has VOLTAGE MODE PWM CONTROL CIRCUIT.

Manufacturers : Unisonic Technologies

Image and pinout :

Some of the text within the PDF file :

UTC TL494 LINEAR INTEGRATED CIRCUIT VOLTAGE MODE PWM CONTROL CIRCUIT DESCRIPTION The UTC TL494 incorporates all the functions required in the construction of a pulse-width modulation switching circuit. Designed primarily for switching power supply control or DCDC convectors, it offers the systems engineer the flexibility to tailor control circuitry to its own application. SOP-16 FEATURES *Complete PWM power control circuitry *Uncommitted outputs for 200 mA sink or source current *Output control selects single ended or push pull operation *Internal circuitry prohibits double pulses over total range *Easy synchronization DIP-16 ABSOLUTE MAXIMUM RATINGS(Unless otherwise noted all is over operating free air temperature range) PARAMETER Supply Voltage(note 1) Amplifier Input Voltage Coll [ ... ]

UTCTL494 PDF Datasheet Download