This part is a kind of semiconductor called IR2520DPBF.
Function of this product has ADAPTIVE BALLAST CONTROL IC.
Manufacturers : International Rectifier
Image and pinout :
Some of the text within the PDF file :
Data Sheet No. PD60212 revC IR2520D(S) & (PbF) ADAPTIVE BALLAST CONTROL IC • • • • • • • • • • Features 600V Half Bridge Driver Integrated Bootstrap FET Adaptive zero-voltage switching (ZVS) Internal Crest Factor Over-Current Protection 0 to 6VDC Voltage Controlled Oscillator Programmable minimum frequency Micropower Startup Current (80uA) Internal 15.6V zener clamp on Vcc Small DIP8/SO8 Package Also available LEAD-FREE (PbF) Packages 8-Lead PDIP IR2520D 8 Lead SOIC IR2520DS Description The IR2520D(S) is a complete adaptive ballast controller and 600V half-bridge driver integrated into a single IC for fluorescent lighting applications. The IC includes adaptive zero-voltage switching (ZVS), internal crest factor over-current protection, as well [ ... ]