This part is a kind of semiconductor called TDA8589BJ.

Function of this product has I2C Bus Controlled 4 x 45 Watt Power Amplifier and Multiple Voltage Regulator.

Manufacturers : Philips

Image and pinout :

Some of the text within the PDF file :

INTEGRATED CIRCUITS DATA SHEET TDA8589J; TDA8589xJ I2C-bus controlled 4 × 45 Watt power amplifier and multiple voltage regulator Product specification 2004 Feb 24 Philips Semiconductors I2C-bus controlled 4 × 45 Watt power amplifier and multiple voltage regulator Product specification TDA8589J; TDA8589xJ FEATURES Amplifiers • I2C-bus control • Can drive a 2 Ω load with a battery voltage of up to 16 V and a 4 Ω load with a battery voltage of up to 18 V • DC load detection: open, short and present • AC load (tweeter) detection • Programmable clip detect 1 % or 3% • Programmable thermal protection pre-warning • Independent short-circuit protection per channel • Low gain line driver mode (20 dB) • L [ ... ]

TDA8589BJ PDF Datasheet Download