Maximum Power 43 W BTL × 4-ch Audio Power IC

The TB2904H (o) is 4-ch BTL audio amplifier for car audio applications.

This IC can generate higher power: POUT MAX = 43 W as it includes the pure complementary P-ch and N-ch DMOS output stage.

It is designed to yield low distortion ratio for 4-ch BTL audio power amplifier, built-in standby function, muting function, and various kinds of protectors.

Additionally, Off-set detector is built in.

Features

• High power output

: POUT MAX (1) = 43 W (typ.)

P (VCC = 14.4 V, f = 1 kHz, JEITA max, RL = 4 Ω)

: POUT MAX (2) = 39 W (typ.)

(VCC = 13.7 V, f = 1 kHz, JEITA max, RL = 4 Ω)

: POUT (1) = 26 W (typ.)

(VCC = 14.4 V, f = 1 kHz, THD = 10, RL = 4 Ω)

: POUT (2) = 23 W (typ.)

(VCC = 13.2 V, f = 1 kHz, THD = 10, RL = 4 Ω)

• Low distortion ratio:

THD = 0.015 (typ.)

(VCC = 13.2 V, f = 1 kHz, POUT = 5 W, RL = 4 Ω)

• Low noise:

VNO = 90 µVrms (typ.)

(VCC = 13.2 V, Rg = 0 Ω, BW = 20 Hz to 20 kHz, RL = 4 Ω)

• Built-in standby switch function (pin 4)

• Built-in muting function (pin 22)

• Built-in Off-set detection function (pin 25)

• Built-in various protection circuits:

Thermal shut down, overvoltage, out to GND, out to VCC, out to out short, speaker burned

• Operating supply voltage: VCC (opr) = 9 to 18 V (RL = 4 Ω)