STMicroelectronics TDA7563ASMTR

Overview

TDA7563ASMTR from STMicroelectronics is a quad-channel Class SB automotive audio power amplifier in Flexiwatt27 SMD package, delivering 4 × 50 W max output (2 Ω, 14.4 V), featuring integrated I²C diagnostics, DMOS output stage, and linear thermal shutdown. It serves as the main speaker driver in OEM car radio head units requiring high-efficiency amplification with real-time speaker fault detection.

For engineers reviewing the TDA7563ASMTR datasheet, TDA7563ASMTR pinout, TDA7563ASMTR application, or TDA7563ASMTR equivalent, key selection criteria include its 4×72 W peak capability at 2 Ω, selectable 12 dB/26 dB gain modes, clipping detector with 2 %/10 % threshold options, and full I²C-accessible diagnostic reporting for DC/AC load faults - all critical for robust automotive infotainment system design.

Technical Context

The TDA7563ASMTR implements a quad-bridge topology using Multipower BCD technology and a DMOS MOSFET output stage, enabling low-distortion operation (0.01 % THD at 1.5 W, HI-EFF mode) and up to 50 % lower power dissipation versus conventional Class AB under average listening conditions. Its internal structure supports simultaneous standby/mute control and independent front/rear soft-play functionality via I²C commands.

Diagnostic operation includes turn-on pulse-based detection (short-to-GND/VS, open/shorted speaker) and permanent monitoring with configurable thresholds, all reported through dedicated I²C registers. The device integrates four independent short-circuit protections, DC offset detection, and a clipping detector pin with externally selectable 2 % or 10 % THD threshold.

Key Specifications

Pinout & Package

Package: Flexiwatt27 (SMD), 27-pin thermally enhanced surface-mount package with exposed slug for efficient heat transfer in compact automotive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad-channel automotive amplifier applications.

Compared with TDA7563ASMTR, TDA7561H sacrifices diagnostics and configurability for lower cost, while TPA5566DAPR trades integrated analog features for higher switching efficiency and external component overhead - making the TDA7563ASMTR optimal for diagnostic-ready, thermally constrained OEM platforms.

Availability

TDA7563ASMTR is available at Aetrix Electronics and suitable for automotive infotainment systems, OEM head units, and aftermarket audio modules requiring stable component supply, long-term lifecycle support, and traceable sourcing for production ramp.

Supply support for TDA7563ASMTR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, specializing in automotive, industrial, and power management ICs with broad manufacturing and quality certifications (AEC-Q100, ISO/TS 16949).

The TDA7563ASMTR belongs to ST's TDA75xx family of automotive audio amplifiers, designed specifically for high-reliability, diagnostics-enabled car radio applications where thermal efficiency and speaker protection are mandatory.

FAQ

What is the maximum continuous output power per channel into 4 Ω?

The TDA7563ASMTR delivers 4 × 28 W continuous output into 4 Ω at 14.4 V supply, 1 kHz, and 10 % THD. This is the guaranteed RMS power level under standard test conditions and represents the usable audio output before significant distortion occurs. Peak capability reaches 4 × 50 W under square-wave conditions but is not sustainable for extended periods without thermal derating.

How does the I²C diagnostic function detect an open speaker?

The I²C diagnostic detects open speakers by applying a subsonic current pulse during turn-on or permanent monitoring and measuring resulting voltage thresholds at each output. An open load is confirmed when the measured voltage falls within the Pnop window (1.8 V to V_S − 1.8 V) while current remains below 250 mA - indicating no closed path to GND or V_S. This value is stored in register DB1 and accessible via I²C read.

Can the CLIP pin be used to drive an LED indicator directly?

Yes, the CLIP pin is an open-drain output rated for 5 mA sink current. It can directly drive a standard LED (with series resistor) to indicate clipping events. When asserted, the pin pulls low; when inactive, it remains high-impedance. No external transistor or buffer is needed, provided the LED forward current is limited to ≤5 mA and the supply rail matches the I²C logic level (typically 3.3 V or 5 V).

What thermal derating applies above 70 °C case temperature?

Thermal derating begins at 70 °C case temperature, with output power linearly reduced to zero at 150 °C junction temperature. The device uses R_{th j-case} = 1 °C/W (Flexiwatt27), so at 90 °C case, allowable power dissipation drops to ~65 W total. Derating is managed internally via linear thermal foldback - no external intervention required - and is reflected in real-time output current limiting per channel.