This part is a kind of semiconductor called OZ9938.

Function of this product has LCDM Inverter Controller.

Manufacturers : O2 Micro

Image and pinout :

Some of the text within the PDF file :

OZ9938 Change Summary CHANGES No. 1. 2. Applicable Section Electrical Characteristics Throughout datasheet Description Update 慞rotection release threshold in ‘Timer & protection’ parameter Min & Max limits Miscellaneous changes Page(s) 3 --- REVISION HISTORY Revision No. 0.60 0.65 Description of change Initial release 1. Electrical Characteristics: a. Modify general test conditions in line 1; b. Modify ‘Driver Frequency – Striking & Normal Operation’ Typ limit; c. Modify ‘PWM Dimming Control – LCT frequency’. 2. Reference Application Circuit: Modify C14, C9 & R9 values 1. Ordering Information: Add OZ9938G, IG, D & DN. 2. Recommended Operating Range: a. Add ‘Dimming Range’; b. Fill in ‘Thermal Impedance’. 3. Electrical Characteristics: a. Update ‘Supply Current’ limits; b. [ ... ]

OZ9938 PDF Datasheet Download