TB2931HQ PDF Datasheet – 49W BTL x 4ch, Audio Amplifier

This post explains for the audio amplifier.

The Part Number is TB2931HQ.

The function of this semiconductor is 49W BTL x 4ch.

The package is SIP 25 Pin type

Manufacturer: Toshiba

Preview images :TB2931HQ pdf amplifier


A 4-channel BTL (Bridge-Tied Load) amplifier is a type of audio amplifier configuration commonly used in car audio systems and other applications where multiple audio channels need to be amplified.

The Bridge-Tied Load (BTL) configuration allows for increased output power compared to a single-ended amplifier configuration. In a BTL setup, two amplifier channels are combined to drive a load (such as a speaker) in a way that effectively doubles the voltage across the load, resulting in higher power output. This is achieved by using the inverted output of one amplifier channel and combining it with the non-inverted output of another channel.

The TB2931HQ is a power IC with built-in 4-channel BTL amplifier developed for car audio.

The output stage uses DMOS and consists of upper P-ch and lower N-ch pure complementary, realizing a maximum output power POUT = 49 W.

It also incorporates a standby switch, mute function, and various protection circuits necessary for car audio.


1. Low distortion. : THD = 0.01% (standard) (VCC = 13.2 V, f = 1 kHz, POUT = 5 W, RL = 4 Ω)

2. Low noise. : VNO = 50 µVrms (standard)
(VCC = 13.2 V, Rg = 0 Ω, BW = 20 Hz ~ 20 kHz, RL = 4 Ω)

3. Built-in standby switch (4 pin)

4. Built-in muting function (22 pins)

Block Diagram:
TB2931HQ datasheet pinout

TB2931HQ PDF Datasheet

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