This part is a kind of semiconductor called SG3524N.
Function of this product has REGULATING PULSE WIDTH MODULATORS.
Manufacturers : STMicroelectronics
Image and pinout :

Some of the text within the PDF file :
® SG2524 SG3524 REGULATING PULSE WIDTH MODULATORS COMPLETE PWM POWER CONTROL CIRCUITRY UNCOMMITTED OUTPUTS FOR SINGLEENDED OR PUSH PULL APPLICATIONS LOW STANDBY CURRENT 8mA TYPICAL OPERATION UP TO 300KHz 1% MAXIMUM TEMPERATURE VARIATION OF REFERENCE VOLTAGE DIP16 SO16 DESCRIPTION The SG2524, and SG3524 incorporate on a single monolithic chip all the function required for the construction of regulating power suppies inverters or switching regulators. They can also be used as the control element for high power-output applications. The SG3524 family was designed for switching regulators of either polarity, transformer-coupled dc-to-dc converters, transformerless voltage doublers and polarity converter applications employing fixed-frequency, pulse-width modulation techniques. The dual alte [ ... ]
SG3524N PDF Datasheet Download
