This part is a kind of semiconductor called AD52582A.

Function of this product has 18W Stereo Class-D Audio Amplifier.

Manufacturers : Elite Semiconductor

Image and pinout :

Some of the text within the PDF file :

ESMT/EMP Features z Dual supply voltage 12 ~ 24V for loudspeaker driver 3.3V for others z Loudspeaker power from 24V supply 8 W/ch into 8Ω @ 1% THD+N for stereo 10 W/ch into 8Ω @ 10% THD+N for stereo z Loudspeaker power from 24V supply 15 W/ch into 4Ω @ 1% THD+N for stereo 18 W/ch into 4Ω @ 10% THD+N for stereo z Single-ended analog inputs z Single-ended outputs z Four selectable, fixed gain settings z Internal oscillator z Short-circuit protection with auto recovery z Thermal protection with auto recovery z Under-voltage detection z Pop noise and click noise reduction Preliminary AD52582A 18W Stereo Class-D Audio Amplifier Applications z TV audio z Boom-Box z Powered speaker Description The AD52582A is a high efficiency stereo class-D audio amplifier. The loudspeaker driver operat [ ... ]

AD52582A PDF Datasheet Download