This part is a kind of semiconductor called TDA7571.

Function of this product has STPDACsw - Fully digital high efficiency power audio amplifier.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

TDA7571 STPDACsw - Fully digital high efficiency power audio amplifier Features ■ Output power 2 x 70W / 1 x 250W 2 ■ I S input (FS = 38 to 48kHz) ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ @ THD<1% PWM output (FPWM = FS x 8) MCLK input = 256 x FS Operation on 24bit ±30V supply voltage (Max.) St-by Mute Stereo/bridge operation selection Protections against short circuit across the load Chip thermal protection External temperature sensor possibility Thermal warning pins Adjustable clip detector pin The maximum output current and voltage swing are depending by the output circuitry (power supply, external power transistors and sensing resistors). The device can work as a stereo single-ended channels or a mono bridge power amplifier. HiQUAD-64 Description The TD [ ... ]

TDA7571 PDF Datasheet Download