TDA7802PD

Overview

The TDA7802PD is a quad bridge audio amplifier from STMicroelectronics, designed for automotive applications. It integrates a full D/A converter and digital input for direct I2S/TDM connection. The device features powerful MOSFET output stages and achieves an outstanding 115 dB S/N ratio with over 110 dB dynamic range. It supports high efficiency operation, reducing dissipated power by up to 50% compared to conventional Class AB solutions. The amplifier includes built-in diagnostics via the I2C bus and is compatible with 'start-stop' battery profiles, operating down to 6 V supply voltage.

Feature Summary

• Integrated 24-bit D/A converter providing 115 dB S/N ratio and >110 dB dynamic range
• High efficiency SB-I concept optimized for uncorrelated music signals
• Full I2C bus control with selectable addresses and digital diagnostics
• Start-stop compatibility with operation down to 6 V supply voltage

Applications

• Automotive audio systems
• Car infotainment amplifiers
• High-power vehicle sound setups requiring thermal management simplification

Procurement Notes

Verify component status as the TDA7802 series has been marked obsolete in public records. Confirm availability through authorized distributors or secondary markets. Ensure the specific PD suffix corresponds to the PowerSO-36 package variant if required for your design. Check for any recent Product Change Notices (PCN) regarding manufacturing site or material changes.

Selection Notes

Select this component when a digital input interface (I2S/TDM) is preferred over analog inputs to minimize noise. The integrated DAC eliminates external conversion requirements. Consider the PowerSO-36 package for surface-mount assembly. Verify that the system can support the I2C control lines and that the thermal design accounts for the high power capability of 4x72 W into 2 Ω loads.

Part Context

The TDA7802 belongs to STMicroelectronics' advanced BCD technology family of automotive audio amplifiers. It is part of a series that includes variants like the TDA7801 and TDA7803. This generation focuses on integrating digital signal processing capabilities directly onto the amplifier chip to enhance audio fidelity and simplify system architecture in modern vehicles.

Replacement Considerations

Public records indicate the TDA7802 is obsolete. Potential replacements within the same family include the TDA7801 or TDA7803, though pinouts and specific feature sets may differ. Verify compatibility with existing PCB layouts and software configurations before substituting.