This part is a kind of semiconductor called BA6840BFP-Y.

Function of this product has 3-phase motor driver.

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

Motor driver ICs 3-phase motor driver BA6840BFS / BA6840BFP-Y / BA6840BFP / BA6842BFS The BA6840BFS, BA6840BFP-Y, BA6840BFP, and BA6842BFS are one-chip ICs designed for driving CD-ROM motors. They are high performance-ICs with a 3-phase, full-wave, pseudo-linear drive system. FApplications CD-ROM / RW, DVD-ROM / PLAYER FFeatures 1) 3-phase, full-wave, pseudo-linear drive system. 2) Start / stop pin; power saving during stop mode. 3) Internal current limit circuit. FBlock diagram 4) Internal thermal shutdown circuit. 5) Internal hall bias circuit. 523 Motor driver ICs BA6840BFS / BA6840BFP-Y / BA6840BFP / BA6842BFS FAbsolute maximum ratings (Ta = 25_C) FRecommended operating conditions 524 Motor driver ICs BA6840BFS / BA6840BFP-Y / BA6840BFP / BA6842BFS FElectrical characteristic [ ... ]

BA6840BFP-Y PDF Datasheet Download