TDA7803A-8ZX

Overview

The STMicroelectronics TDA7803A-8ZX is a single-chip quad bridge amplifier in advanced BCD technology, integrating a full D/A converter and digital input for direct I2S or TDM connection. It features powerful MOSFET output stages with high efficiency optimized for uncorrelated music signals. The device supports supply voltages from 6 V to 18.5 V, ensuring compatibility with automotive 'start-stop' battery profiles. Key electrical parameters include a 115 dB dynamic range (A-weighted), 4 x 27 W output power into 4 Ω at 14.4 V, and operation within an ambient temperature range of -40°C to +105°C.

Feature Summary

• High Efficiency SB-I Operation: Reduces dissipated output power by up to 50% compared to conventional Class AB solutions under average listening conditions.
• Digital Audio Interface: Supports I2S standard and TDM formats (4Ch, 8Ch, 16Ch) with sample rates of 44.1 kHz, 48 kHz, 96 kHz, and 192 kHz.
• Comprehensive Diagnostics: Full diagnostic array via I2C bus including DC/AC load detection, offset detection, clipping detection, and thermal protection.
• Start-Stop Compatibility: Operates down to 6 V supply voltage, compatible with modern automotive battery modulation profiles.

Applications

• Automotive audio systems requiring high-efficiency digital amplification
• Vehicle infotainment head units with integrated amplifier functionality
• Multi-channel speaker setups utilizing I2S/TDM digital inputs

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to confirm package type and tape/reel specifications. Ensure the component grade matches AEC-Q100 automotive qualification requirements for the intended application environment.

Selection Notes

Select this model for applications requiring digital input integration without external DACs. Consider the Flexiwatt-27 PowerSO-36 package for surface mount assembly. Verify that the system design accommodates the 1.8V/3.3V logic levels for I2C and I2S interfaces.

Part Context

The TDA7803A belongs to STMicroelectronics' family of high-efficiency digital input automotive quad power amplifiers. It is designed to replace traditional analog amplifiers in modern vehicle architectures, offering simplified system design, improved noise immunity, and enhanced diagnostic capabilities through its integrated digital processing core.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer's official cross-reference list for verified alternatives.