TDA7564B

STMicroelectronics TDA7564B is a quad-channel automotive audio power amplifier IC. It combines four AB-class amplifiers with bridge-tied outputs (BTL) to drive four car loudspeakers from a 12 V automotive supply. Typical per-channel output is around 10–11 W into 4 Ω (values depend on supply and load). Key features include mute/standby, thermal protection, overcurrent/short-circuit protection, and undervoltage protection with pop-free startup. It requires only a few external components (decoupling and basic biasing) and is designed for compact integration in car head units or multimedia mounts. In short, it’s a single-chip, high-level solution for four-speaker car audio systems.

There’s no single guaranteed drop‑in substitute. Close alternatives are ST’s own TDA7564 / TDA7564A and functionally similar 4‑channel car audio amps such as ST TDA7384, ST/NXP TDA7560 or NXP TDA7850. Verify pinout, power ratings, gain, mute/standby controls and thermal specs against the TDA7564B datasheet before substituting.

The TDA7564B comes in a Multiwatt15 package (15 pins plus the metal mounting tab). Function: it is a 4‑channel BTL car audio power amplifier (typically rated ~4 × 40–45 W into 4 Ω with VS ≈ 14.4 V). Key features/pin roles include VCC (power supply), GND (ground), four differential audio inputs, four speaker outputs (BTL pairs), mute/standby control pin(s), a diagnostics/diagnostic sense pin, and internal protection (thermal, overcurrent/short‑circuit, load dump suppression). For full pin-by-pin assignments and electrical characteristics refer to the STMicroelectronics datasheet.

Manufacturer: STMicroelectronics (ST).
STMicroelectronics is a multinational, publicly traded semiconductor company headquartered in Plan‑les‑Ouates (Geneva), Switzerland. It designs and manufactures integrated circuits and discrete semiconductor components (analog, power, microcontrollers, sensors, etc.) for automotive, industrial, consumer electronics and communications markets.

Applications of TDA7564B:
- Automotive audio systems (OEM head units and aftermarket car stereos)
- 4-channel car amplifier for front and rear speakers
- In-dash multimedia/navigation units with integrated amplification
- In-vehicle audio modules requiring protection features (short-circuit, overload, thermal shutdown)
Note: Designed for compact, protected automotive power amplification with car-ready audio integration.

The TDA7564B is supplied in a 15‑lead Multiwatt (Multiwatt15) through‑hole power package designed for mounting to a heatsink.