This part is a kind of semiconductor called TDA7386.

Function of this product has 4 x 40W QUAD BRIDGE CAR RADIO AMPLIFIER.

Manufacturers : ST Microelectronics

Image and pinout :

Some of the text within the PDF file :

® TDA7386 4 x 40W QUAD BRIDGE CAR RADIO AMPLIFIER HIGH OUTPUT POWER CAPABILITY: 4 x 45W/4Ω MAX. 4 x 40W/4Ω EIAJ 4 x 28W/4Ω @ 14.4V, 1KHz, 10% 4 x 24W/4Ω @ 13.2V, 1KHz, 10% LOW DISTORTION LOW OUTPUT NOISE ST-BY FUNCTION MUTE FUNCTION AUTOMUTE AT MIN. SUPPLY VOLTAGE DETECTION LOW EXTERNAL COMPONENT COUNT: – INTERNALLY FIXED GAIN (26dB) – NO EXTERNAL COMPENSATION – NO BOOTSTRAP CAPACITORS PROTECTIONS: OUTPUT SHORT CIRCUIT TO GND, TO VS, ACROSS THE LOAD VERY INDUCTIVE LOADS OVERRATING CHIP TEMPERATURE WITH SOFT THERMAL LIMITER LOAD DUMP VOLTAGE FORTUITOUS OPEN GND BLOCK AND APPLICATION DIAGRAM Vcc1 FLEXIWATT25 ORDERING NUMBER: TDA7386 REVERSED BATTERY ESD DESCRIPTION The TDA7386 is a new technology class AB Audio Power Amplifier in Flexiwatt 25 package designed for high end [ ... ]

TDA7386 PDF Datasheet Download