This post explains for the semiconductor 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
Preview images :
The TB2926CHQ 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 49 W. It includes a standby switch, mute function and various protection 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.