This part is a kind of semiconductor called OZ9998B.
Function of this product has (OZ99xx) Intelligent Lighting.
Manufacturers : O2Micro
Image and pinout :
Some of the text within the PDF file :
http://www.DataSheet4U.net/ Intelligent Lighting Family Product Guide Part Number Description Package(s) Available Page No. Intelligent Lighting Family Product Guide Part Number Description Package(s) Available Page No. CCFL/EEFL Intelligent Inverter® Controller ICs LCD MONITOR (LCDM) APPLICATIONS OZ9919 OZ9933 OZ9937 OZ9938 Selectable LCDM Controller LCDM Full-Bridge Controller 16 SOP, Lead-free 16 PDIP, SOP, Lead-free 7 8 9 10 LED Backlight Controller ICs (cont.) MONITOR APPLICATIONS OZ9902 OZ9906 OZ9908 OZ9961 Dual Channel High Power LED 24 SOP, SSOP, Lead-free Driver Six String LED Controller Eight String High Power LED Controller Six String LED Controller Six String High Power LED Controller LED Backlight Controller Eight String High Power LED Controller Four String High Power LE [ ... ]