This post explains for the Audio Power IC.
The Part Number is TB2926CHQ, TB2926.
The function of this semiconductor is 49W x 4-ch BTL Audio Power IC.
The package is ZIP 25 Pin Type
Manufacturer: Toshiba
Preview images :
Description
The TB2926CHQ is a four-channel BTL power amplifier for car audio applications.
A four-channel BTL (Bridge-Tied Load) power amplifier is an audio amplifier configuration that is designed to drive four separate channels of audio using a BTL setup. BTL amplifiers are known for their ability to provide higher power output compared to single-ended amplifiers.
This IC has a pure complementary P-ch and N-ch DMOS output stage, offering maximum output power (POUT MAX) of 49 W. It includes a standby switch, mute function and various protection features.
BTL Configuration:
The Bridge-Tied Load configuration is a way to achieve higher power output by connecting the load (usually a speaker) between two amplifier outputs. In a BTL setup, each channel is essentially divided into two halves, and the load is connected between the “hot” outputs of these halves. This allows for greater voltage swing and thus higher power delivery to the load.
Features
1. Standby switch (pin 4)
2. Mute function (pin 22)
3. Output DC offset detection (pin 25)
4. Various protection features
Standby Switch (pin 4) :
The power supply can be turned on or off via pin 4 (Stby). The threshold voltage of pin 4 is
set at about 3 VBE (typ.). The power supply current is about 0.01 μA (typ.) in the standby state.
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Block Diagram
TB2926CHQ PDF Datasheet
