TDA7563

Overview

The TDA7563 is a quad bridge car radio amplifier utilizing Multipower BCD technology and DMOS output stages. It delivers up to 4x28W into 4Ω at 14.4V with 10% THD, or 4x72W max power into 2Ω. Operating on an 8V to 18V supply, it features selectable gains of 30dB or 16dB for low noise line output. The device integrates comprehensive I2C bus diagnostics for speaker status, DC offset detection, and clipping monitoring.

Feature Summary

• Non-switching high-efficiency architecture reduces thermal dissipation by up to 50% compared to conventional Class AB solutions.
• Full I2C bus interface enables independent front/rear soft play/mute, standby control, and digital diagnostics reporting.
• DMOS output stage ensures very low distortion for clear audio reproduction.
• Integrated protection includes four independent short circuits, linear thermal shutdown, and DC offset detection.

Applications

• Car radio applications
• High power automotive audio sets

Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors. Confirm the Flexiwatt27 package type matches design requirements. Check datasheet revisions as specifications may change without notice. Ensure proper thermal management due to high power dissipation characteristics. Validate I2C communication protocols against current software implementations.

Selection Notes

Select this component for automotive systems requiring high efficiency and integrated diagnostics. Consider the Flexiwatt27 package for vertical mounting. Evaluate thermal constraints given the 85W dissipation capability. Verify I2C bus compatibility with the host microprocessor. Assess gain settings (30dB vs 16dB) based on input signal levels.

Part Context

Part of the TDA7563 family of multifunction quad power amplifiers. Designed specifically for automotive environments using BCD technology. Replaced by newer variants like TDA7563A/B in some contexts but remains a distinct obsolete product code.

Replacement Considerations

TDA7563A and TDA7563B are related successors with similar functionality but updated features and packages. Verify pinout compatibility and I2C register mapping before substitution.

FAQ

How does the TDA7563 handle thermal overload?

It uses thermal foldback, which linearly reduces audio input to limit output power and temperature without completely shutting down operation.

What diagnostic faults can be detected via I2C?

It detects short to GND, short to Vs, short across the speaker, open load, and output DC offset exceeding +/- 2V.