This part is a kind of semiconductor called APA2614.

Function of this product has 15W Stereo Class-D Audio Power Amplifier.

Manufacturers : ANPEC

Image and pinout :

Some of the text within the PDF file :

APA2614 15W Stereo Class-D Audio Power Amplifier Features • • • • • • • • • • Supply Voltage is 8V ~ 26V Class D operation eliminates heat sink & reduce power supply requirement 20,26, 32, 36, 4 steps gain setting 15W/ch into an 8Ω Loads at 10% THD+N from a 16V supply 10W/ch into 8Ω Loads at 10% THD+N from a 13V supply 30W into a 4Ω Mono Load at 10% THD+N from a 16V Supply Adjustable Power limit function plus DC Protection Thermal and Over-Current Protections with AutoRecovery option TSSOP-28P with thermal pad packages QFN4x4-28 with thermal pad packages General Description The APA2614 is a stereo, high efficiency, Class-D audio amplifier available in TSSOP-28Pand QFN4x4-28 pins packages. The Class-D power amplifier has higher efficiency compare to the tradition [ ... ]

APA2614 PDF Datasheet Download