This part is a kind of semiconductor called CM8601.

Function of this product has 3 Watt Audio Power Amplifier.

Manufacturers : Micro Technology

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Some of the text within the PDF file :

深圳市天罡微科技有限公司 CM8601 3 Watt Audio Power Amplifier with Selectable Shutdown Logic Level General Description The CM8601 is an audio power amplifier primarily designed for demanding applications in mobile phones and other por- table communication device applications. It is capable of delivering 1.25 watts of continuous average power to an 8 BTL load and 2 watts of continuous average power (LD and MH only) to a 4ΩBTL load with less than 1% distortion (THD+N+N) from a 5.5VDC power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The CM8601 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low [ ... ]

CM8601 PDF Datasheet Download