This part is a kind of semiconductor called TA8260AH.

Function of this product has Max Power 40 W BTL x 4CH Audio Power IC.

Manufacturers : Toshiba Semiconductor

Image and pinout :

Some of the text within the PDF file :

TA8260AH TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA8260AH Max Power 40 W BTL × 4CH Audio Power IC The TA8260AH is 4 ch BTL audio power amplifier for car audio application. This IC can generate more high power: POUT MAX = 40 W as it is included the pure complementary PNP and NPN transistor output stage. It is designed low distortion ratio for 4 ch BTL audio power amplifier, built-in Stand-by Function, Muting Function, Clip detector, and diagnosis circuit. Additionally, the AUX. amplifier is built-in, it can make the beep signal etc. output to 2 channels (OUT1 and 4). It contains various kind of protectors for car audio use. Features · High power : POUT MAX (1) = 40 W (typ.) (VCC = 14.4 V, f = 1 kHz, JEITA max, RL = 4 Ω) : POUT MAX (2) = 37 W (typ.) (VCC = 13.7 V, [ ... ]

TA8260AH PDF Datasheet Download