This part is a kind of semiconductor called TB2929HQ.

Function of this product has 45W X 4-ch BTL Audio Power IC.

Manufacturers : Toshiba

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Some of the text within the PDF file :

TB2929HQ TOSHIBA Bi-CMOS Linear Integrated Circuit Silicon Monolithic TB2929HQ 45W × 4-ch BTL Audio Power IC The TB2929HQ is a four-channel BTL power amplifier for car audio applications. This IC has a pure complementary P-ch and N-ch DMOS output stage, offering maximum output power (POUT MAX) of 45 W. It includes a standby switch, mute function and various protection features. Features • High output power • • • • • • • • • • • POUT MAX (1) = 45 W (typ.) (VCC = 15.2 V, f = 1 kHz, JEITA max, RL = 4 Ω) POUT MAX (2) = 41 W (typ.) (VCC = 14.4 V, f = 1 kHz, JEITA max, RL = 4 Ω) POUT (1) = 24 W (typ.) (VCC = 14.4 V, f = 1 kHz, THD = 10%, RL = 4 Ω) POUT (2) = 21 W (typ.) (VCC = 13.2 V, f = 1 kHz, THD = 10%, RL = 4 Ω) Weight: 7.7 g (typ.) Low THD: 0.007% (typ.) (VCC [ ... ]

TB2929HQ PDF Datasheet Download