75 W per channel into 2 Ω — the power delivery for quad audio
The TDA7563BH is a Class AB audio amplifier from STMicroelectronics delivering 75 W per channel into a 2 Ω load across all four channels — enough to drive a full-range car audio system or a multi-zone home sound installation without an external booster stage. Operating from an 8 V to 18 V supply rail, it works directly off a standard automotive battery bus and tolerates the voltage excursions of a charging system without a separate regulator.
Temperature range and thermal management for the enclosure
The 27-Flexiwatt (Horizontal) package is a formed-lead through-hole design that bolts to a heatsink or chassis panel — the wide tab transfers the dissipated heat directly to the metalwork, keeping the die below the thermal shutdown threshold during sustained high-power output. Built-in short-circuit and thermal protection means the amplifier shuts itself down before the output stage or the load wiring fails — a common failure mode in automotive audio where a speaker wire chafes against the chassis.
Active production — sourcing for the BOM line
The I²C bus interface allows volume, balance, and mute control from a host microcontroller — the amplifier responds to digital commands over a two-wire serial link, eliminating the need for analog potentiometers in the signal path.