This part is a kind of semiconductor called DT8211.

Function of this product has Inverter Driver IC.

Manufacturers : DMBTech

Image and pinout :

Some of the text within the PDF file :

PD F ww 2008.7.11 DMB Technology Inc,. w.n Cre DT8211 Inverter Driver IC (Application Note) a ua te nce 8 .c T om ria l http:// Pinning information PIN Symbol VREF EN ADIM BDIM RTS RT CT I/O O I I I 2 3 4 5 6 7 8 9 a ua te O O O I I I O O I O O I CTB PROT IFB VFB ICMP VCMP GND LOUT HOUT VCC Cre 10 11 w.n PD F 12 13 ww 14,15 16 17 18 nce 8 .c T O Protection Pin Ground Top View 1 Reference Voltage (VREF) = 6V ON/OFF Control Pin Analog Dimming Pin (Positive and Negative Mode) Frequency Setting Resistor for Striking PWM Frequency Frequency Setting Resistor for Main PWM Frequency Frequency Setting Capacitor for Main PWM Frequency Frequency Setting Capacitor for Burst Dimming Frequency Feedback Input for Current Regulation Feedback Input for Voltage [ ... ]

DT8211 PDF Datasheet Download