This part is a kind of semiconductor called AW8736.

Function of this product has Sixth generation Class K Audio Amplifier.

Manufacturers : AWINIC

Image and pinout :

Some of the text within the PDF file :

AW8736 Data Sheet April 2013 V1.4 High efficiency、Ultralow distortion、Constant large volume、Sixth generation Class K Audio Amplifier FEATURES  New generation charge pump technology ： K-Chargepump，efficiency reaches as high as 92%  Power amplifier overall efficiency 75%，greatly prolong mobile phone usage time  Ultra-low distortion：0.02%  Within Lithium battery voltage range, output power is maintained constant  Output Power level：0.8W、1W、1.2W  Second generation No-crack-noise (NCN) technology  Super TDD-Noise suppression  Ultra-low EMI  One wire pulse control  High PSRR：-65dB（217Hz）  Small 2mm×2mm FC-16package APPLICATIONS  Smart phone DEVICE PINOUT AW8736FCR TOP VIEW DESCRIPTION AW8736 is designed to enhance smart mobile phon [ ... ]

AW8736 PDF Datasheet Download