This part is a kind of semiconductor called TDA7498L.

Function of this product has 80 watt + 80 watt dual BTL class-D audio amplifier.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

TDA7498L 80-watt + 80-watt dual BTL class-D audio amplifier PowerSSO-36 exposed pad up Features • 80 W + 80 W output power at THD = 10% with RL = 6 Ω and VCC = 32 V • 70 W + 70 W output power at THD = 10% with RL = 8 Ω and VCC = 34 V • Wide-range single-supply operation (14 - 36 V) • High efficiency (η = 90%) • Four selectable, fixed gain settings of nominally 25.6 dB, 31.6 dB, 35.1 dB and 37.6 dB Datasheet - production data • Differential inputs minimize common-mode noise • Standby and mute features • Short-circuit protection • Thermal overload protection • Externally synchronizable Description The TDA7498L is a dual BTL class-D audio amplifier with single power supply designed for home systems and active speaker applications. It comes in a 36-pin PowerSSO pac [ ... ]

TDA7498L PDF Datasheet Download