This part is a kind of semiconductor called BA5417.

Function of this product has High-output dual power amplifier.

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

Class-AB Speaker Amplifiers 5W+5W Stereo Speaker Amplifiers BA5406,BA5417 No.13077EDT02 ●Description The BA5406/BA5417 is a dual OTL monolithic power IC with two built-in, high output speaker amplifier circuits. High output of 5W×2 can be produced when VCC=12 V and RL=3Ω, and 2.8 W×2 when VCC=9V and RL=3Ω. The BA5406, which uses a high allowable power dissipation package, has a simple heatsink design. The BA5417 not only exceeds basic characteristics, but also has a built-in soft clip circuit, thermal shutdown and standby circuits. ●Features BA5406 1) Good low voltage characteristics (Operation from Vcc=5 V) 2) Ripple filter (6pin) also can be used as muting pin (Make 6pin GND potential) 3) Small thermal resistance package and simple heatsink design BA5417 1) Small pop noise w [ ... ]

BA5417 PDF Datasheet Download