This part is a kind of semiconductor called BA5830FM.

Function of this product has MOTOR CONTROLLER.

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

1/4 STRUCTURE PRODUCT SERIES TYPE Features Silicon Monolithic Integrated Circuit Power driver for compact disc player BA5830FM 4CH BTL Driver. Employs the HSOP-M28PIN power package for compaction. Has a wide dynamic range. (PreVcc=PowVcc=8V,RL=8Ω 6.0V(typ.)) Incorporates the thermal shutdown circuit. Separating Vcc into Pre and Power (Power divides into CH1/2 and CH3/4), can make better Power efficiency. Switches CH4 input by CNT. Incorporates mute function by CNT terminal and mute terminal. A variable regulator is built in. Absolute Maximum Rating (Ta=25 ) Item Symbol Rating Unit PreVcc,PowVcc 18 Supply voltage V VIN*1 18 Input terminal voltage Pd 2.2*2 Power dissipation Iomax 1*3 Maximum output current -40 +85 Topr Operating temperature range -55 +150 Tstg Storage temperature range [ ... ]

BA5830FM PDF Datasheet Download