TDA7801SM

Overview

The TDA7801SM is a quad bridge power amplifier designed for automotive audio applications, manufactured by STMicroelectronics. It utilizes BCD6 technology to integrate high-performance digital-to-analog conversion with powerful MOSFET outputs on a single chip. The device supports I2S and TDM digital inputs with selectable sampling frequencies of 44.1 kHz, 48 kHz, 96 kHz, and 192 kHz. It delivers up to 4x28 W into 4 Ω loads at 14.4 V and achieves a maximum output power of 4x72 W into 2 Ω. Key electrical specifications include an integrated 110 dB D/A converter and a signal-to-noise ratio of 115 dB. The component operates within a supply voltage range of 8 V to 18 V and functions reliably across temperatures from -40°C to 105°C.

Feature Summary

• Integrated 110 dB D/A conversion with 115 dB S/N ratio
• Digital input interface supporting I2S and TDM modes
• High output power capability: 4x28 W/4Ω or 4x72 W/2Ω
• Full I2C bus diagnostics including load detection and fault protection

Applications

• Automotive audio systems
• Car speaker amplification
• Digital input audio processing

Procurement Notes

Verify the obsolete status of the TDA7801 series before procurement planning. The product was marked as End-of-Life (EOL) on February 13, 2023. Confirm availability through secondary market channels or evaluate replacement components if long-term supply stability is required for production.

Selection Notes

Select this component for applications requiring integrated digital audio processing and high-power output in a compact package. Ensure the design supports the 27-Flexiwatt surface-mount package for adequate thermal management. Verify that the host controller provides compatible I2S/TDM signals and I2C control lines for configuration and diagnostic monitoring.

Part Context

The TDA7801SM belongs to the TDA7801 family of digital input quad power amplifiers. It is part of STMicroelectronics' portfolio of automotive-grade audio solutions leveraging BCD technology. This series integrates analog power stages with digital interfaces to simplify system architecture in modern vehicle infotainment setups.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the EOL status, consult manufacturer resources for current alternative automotive audio amplifier families.