This part is a kind of semiconductor called BD9766FV.

Function of this product has DC-AC Inverter Control IC.

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

1/4 STRUCTURE NAME OF PRODUCT Silicon Monolithic Integrated Circuit DC-AC Inverter Control IC TYPE FUNCTION ＢＤ９７６６ＦＶ ・2ch control with Half-bridge ・Lamp current and voltage sense feed back control ・Sequencing easily achieved with Soft Start Control ・Short circuit protection with Timer Latch ・Under Voltage Lock Out ・Short circuit protection with over voltage ・Mode-selectable the operating or stand-by mode by stand-by pin ・Control PWM and BURST mode by DUTY pin ・BURST mode with 2ch Reverse phase ○Absolute Maximum Ratings（Ta = 25℃） Parameter Supply Voltage Operating Temperature Range Storage Temperature Range Power Dissipation Maximum Junction Temperature Symbol VCC Topr Tstg Pd Tjmax Limits 12 -35～+85 -55～+125 850* +125 Unit V ℃ ℃ mW [ ... ]

BD9766FV PDF Datasheet Download