This part is a kind of semiconductor called CXA-0317.

Function of this product has 18W QUAD OUTPUTS.

Manufacturers : TDK

Image and pinout :

Some of the text within the PDF file :

DC-AC INVERTER UNIT CXA-0317 (18W QUAD OUTPUTS WITH DIMMING FUNCTION) DESCRIPTION : This low profile DC to AC Inverter is developed for quad lamps LCD back-light. Application includes LCD Monitor and Industrial PC. Applicable LCD; 15 inch quad lamp type Lamp Voltage 660Vrms Lamp Current 7mArms Lamp Start Up Voltage 1600Vrms (Vin : 12V) FEATURES : PWM dimming Current Feedback Circuit Regulated output current Silicon coating in High Voltage area TEMPERATURE & HUMDITY : Operating Temperature Range Storage Temperature Range Humidity 0 °C ~ +60 °C -30 °C ~ +85°C 95 %RH max 120 ± 0.5 113 ± 0.2 (3.5) (3.5) 43 ± 0.2 T1 IC02 T2 VR1 DIMENSIONS : (3.5) 50 ± 0.5 Unit : mm Weight :43.7g typ. High Voltage generation Area CXA-0317 1309 Made in Japan CN2 CN3 1 1 1 CN [ ... ]

CXA-0317 PDF Datasheet Download