TDA7801PD

Overview

The TDA7801PD is a quad bridge audio power amplifier designed for automotive applications, manufactured by STMicroelectronics. It utilizes BCD technology to integrate high-performance digital-to-analog conversion with MOSFET outputs, achieving an outstanding 115 dB signal-to-noise ratio and over 105 dB dynamic range. The device supports I2S digital input with TDM options and offers selectable sampling frequencies of 44.1 kHz, 48 kHz, 96 kHz, and 192 kHz. It operates within a supply voltage range of 8V to 18V and functions reliably across a temperature range of -40°C to 105°C (TA).

Feature Summary

• Integrated 110 dB D/A conversion with I2S/TDM digital input interface.
• High output power capability: 4x28 W/4 Ω @ 14.4 V, 1 kHz, 10% THD; Max 4x72 W/2 Ω.
• Full I2C bus control for configuration, diagnostics, and independent front/rear soft play/mute.
• Comprehensive protection including short circuit, thermal warnings, and ESD.

Applications

• Car audio systems
• High-end car radio equipment
• Audio boosters

Procurement Notes

The TDA7801PD is listed as obsolete by the manufacturer. Verification of availability through authorized distributors or secondary market sources is required. Ensure compliance with RoHS3 standards and check for specific package variants if sourcing replacements.

Selection Notes

Select this component for applications requiring integrated digital audio processing and high channel count in a compact PowerSO-36 package. Verify compatibility with I2S/TDM source signals and ensure the system design accommodates the 8V–18V supply range and automotive-grade thermal requirements.

Part Context

This part belongs to the TDA7801 series of digital input quad power amplifiers. It is specifically engineered for car audio environments, leveraging BCD6 technology to combine DAC functionality with power stages, reducing external component count compared to analog-only solutions.

Replacement Considerations

As the TDA7801PD is obsolete, consider checking for newer STMicroelectronics automotive audio amplifier series that support similar I2S/TDM interfaces and power outputs. Verify pinout compatibility and thermal management requirements when selecting a substitute.