TDA7803A-ZSX

Overview

The STMicroelectronics TDA7803A-ZSX is a single-chip quad bridge automotive power amplifier utilizing advanced BCD technology. It integrates a full D/A converter, digital inputs for direct I2S or TDM connection, and powerful MOSFET output stages. The device supports 24-bit digital processing with an outstanding 115 dB signal-to-noise ratio and over 110 dB dynamic range. Operating within a supply voltage range of 6 V to 18.5 V, it delivers up to 4 x 27 W into 4 Ω loads at 14.4 V with 10% THD. Packaged in PowerSO-36 with an exposed top pad, it is AEC-Q100 qualified for operation between -40°C and +105°C.

Feature Summary

• High efficiency SB-I operation optimized for uncorrelated music signals, reducing dissipated output power by up to 50% compared to conventional Class AB solutions.
• Integrated programmable PLL capable of locking at input frequencies of 64*Fs for all supported configurations.
• Comprehensive diagnostic array communicating speaker status via the I2C bus, including DC/AC load detection and thermal protection.
• Start-stop compatibility allowing music playback down to 6 V supply voltage.

Applications

• Automotive audio systems requiring high-efficiency digital amplification
• Vehicle infotainment systems compatible with start-stop battery profiles
• Digital audio architectures utilizing I2S or TDM interfaces

Procurement Notes

Verify that the specific ordering suffix matches the required package orientation and pin configuration. Confirm that the component meets AEC-Q100 qualification standards for the intended automotive environment. Ensure the design accommodates the PowerSO-36 package requirements for thermal management and electrical connections.

Selection Notes

Select this model when a quad bridge amplifier with integrated digital-to-analog conversion is required. The PowerSO-36 package enables selectable I2C addresses, which is not available in other package options. Consider the 6 V minimum operating voltage if the application involves significant battery voltage drops during cranking or start-stop events.

Part Context

The TDA7803A-ZSX belongs to the TDA7803A series of high-efficiency digital input automotive quad power amplifiers. This series is designed to replace traditional analog amplifiers in modern vehicle architectures by integrating digital processing directly on the chip. The ZSX suffix specifically denotes the PowerSO-36 package variant.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material. Verify pinout compatibility and thermal resistance values when considering alternative components from different manufacturers.

FAQ

What is the maximum output power capability of the TDA7803A?

The device can deliver 4 x 27 W into 4 Ω loads and 4 x 47 W into 2 Ω loads at 14.4 V with 10% THD at 1 kHz.

Does the TDA7803A support digital audio interfaces?

Yes, it features flexible serial data ports supporting standard I2S, TDM 4-channel, TDM 8-channel, and TDM 16-channel (8+8 channel) formats.

How does the device handle low voltage conditions?

It is compatible with start-stop battery profiles and can play music down to a 6 V supply voltage.