This part is a kind of semiconductor called BA5954FM.

Function of this product has Current feedback actuator driver.

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

Current feedback actuator driver BA5954FP/FM Description BA5954FP/FM is an actuator driver IC for CD-ROM and DVD players. This actuator driver adopts current feedback system. This IC incorporates 2 channel actuator drivers and 2 channel motor drivers. Current phase lag influenced load inductance is little, because this type is current feedback. Dimension (Units : mm) 28 18.5 ± 0.2 15 9.9 ± 0.3 7.5 ± 0.2 1 5.15 ± 0.1 0.8 0.35 ± 0.1 0.08 M 16.0 ± 0.2 14 0.25 ± 0.1 2.2 ± 0.1 Features 1) Wide dynamic range VOM4.0V(typ.) at PreVcc=12V,PVcc=5V,RL=8Ω 2) Level shift circuit built in. 3) Thermal-shut-down circuit built in. 4) Stand-by mode built in. 0.11 0.1 S HSOP28 / HSOP-M28 Applications CD/CD-ROM Absolute Maximum Ratings (Ta=25˚C) Parameter Supply voltage Power dissip [ ... ]

BA5954FM PDF Datasheet Download