This part is a kind of semiconductor called TL494.

Function of this product has SWITCHMODE PULSE WIDTH MODULATION CONTROL CIRCUIT.

Manufacturers : ON Semiconductor

Image and pinout :

Some of the text within the PDF file :

TL494, NCV494 SWITCHMODE™ Pulse Width Modulation Control Circuit The TL494 is a fixed frequency, pulse width modulation control circuit designed primarily for SWITCHMODE power supply control. Features • Complete Pulse Width Modulation Control Circuitry • On−Chip Oscillator with Master or Slave Operation • On−Chip Error Amplifiers • On−Chip 5.0 V Reference • Adjustable Deadtime Control • Uncommitted Output Transistors Rated to 500 mA Source or Sink • Output Control for Push−Pull or Single−Ended Operation • Undervoltage Lockout • NCV Prefix for Automotive and Other Applications Requiring Site and Control Changes • Pb−Free Packages are Available* MAXIMUM RATINGS (Full operating ambient temperature range applies, unless otherwise noted.) Rating Symbol Value [ ... ]

TL494 PDF Datasheet Download