This part is a kind of semiconductor called LA4287.

Function of this product has 6W Monaural Power Amplifier.

Manufacturers : Sanyo Semicon Device

Image and pinout :

Some of the text within the PDF file :

Ordering number : EN5726 LA4287 Monolithic Linear IC Audio Output for TV application 6W Monaural Power Amplifier Overview The LA4287 is a 6W monaural power amplifier IC. The LA4287 features a built-in electronic volume control circuit and only requires a minimal number of external components and thus is optimal for use as the audio output power amplifier in TV sets. Functions • 6W monaural power amplifier (VCC = 20V, RL = 8Ω) • This device is pin compatible with the LA4285 (3.0W) • Electronic volume control circuit • Input selector switch Specifications Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Allowable power dissipation Thermal resistance Operating temperature Storage temperature Symbol VCC max Pd max θj-c Topr Tstg Conditions Rg = 0 (No signal) Wi [ ... ]

LA4287 PDF Datasheet Download