This part is a kind of semiconductor called BA3950A.

Function of this product has System power supply for CD player equipped audio systems.

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

Regulator ICs System power supply for CD playerequipped audio systems BA3950A With 13.3V (external transistor required), 12V, 10V, and 5.6V outputs, the BA3950A power supply IC is best suited for CD player-equipped audio systems. FApplications CD player-equipped audio systems FFeatures 1) 13.3V (external transistor required), 12V, 10V, and 5.6V outputs are built in (one output for each voltage). 2) Output current limit circuit protects the IC against short-circuiting damage. 3) Thermal protection circuit prevents heat damage to the IC. 4) Compact SIP-M12 package allows a large power dissipation. FAbsolute maximum ratings (Ta = 25_C) FRecommended operating conditions (Ta = 25_C) 199 Regulator ICs FBlock diagram BA3950A FPin descriptions 200 Regulator ICs FInput / output circuits [ ... ]

BA3950A PDF Datasheet Download