Part Number: TB2931HQ

Function: 49W BTL x 4channel, Audio Amplifier

Package: HZIP 25 Pin Type

Manufacturer: Toshiba

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Description

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

A 4-channel BTL (Bridge-Tied Load) audio amplifier is a type of audio amplifier that is capable of driving four speakers or loads independently. The term “BTL” refers to the bridge-tied load configuration, which is a specific amplifier topology used to increase the output power of the amplifier.

In a bridge-tied load configuration, two amplifier channels are combined to drive a single speaker or load. This effectively doubles the voltage swing across the load, thereby increasing the available output power. By using this configuration, the 4-channel BTL audio amplifier can provide higher power output to each speaker compared to a standard single-ended amplifier.

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.

Standby switch function (4 pins)

Power ON/OFF control is possible by controlling pin 4 (Stand-By terminal) to High and Low. The threshold voltage of pin 4 is set to about 2 VBE (typ.) and the power supply current in standby mode is about 0.01 µA (typ.).

Block diagram:

TB2931HQ PDF Datasheet

Part Number: STK433-870-E

Function: 60W, 4-channel Class AB audio power IC

Package: SIP 23 Pin Type

Manufacturer: Sanyo

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Description

The STK433-870-E is 60W×4 channels class-AB audio frequency power amplifier hybrid IC.

A Class AB audio power IC is an integrated circuit used to amplify audio signals and output them to speakers or other load devices. Class AB represents an intermediate form between the two primary classes for power amplification: Class A and Class B. AB class combines some characteristics of both A and B classes to achieve a balance between efficiency and linearity.

Features

1. Pin-to-pin compatible outputs ranging from 60W to 80W

2. Compact package (64.0mm×31.1mm×9.0mm, 78.0mm×44.1mm×9.0mm)

3. Output load impedance RL=6Ω, 8Ω supported.

4. Allowable load shorted time: 0.3s

5. Allows the use of predesigned applications for standby and mute circuits

 

Applications:

1. Audio power amplifiers.

Class AB audio power ICs are primarily used in audio amplifiers, speaker amps, and audio systems.

STK433-870-E PDF Datasheet

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