TDA7393

Overview

The TDA7393 is a Class AB dual bridge audio power amplifier in a Multiwatt15 package, designed for high-end car radio applications. It delivers up to 35W maximum output per channel into 4Ω loads and 28W typ. into 2Ω at 14.4V. The device features an internally fixed gain of 32dB, eliminating the need for external compensation or bootstrap capacitors. Operating supply voltage ranges from 8V to 18V, with a DC limit of 28V. Quiescent current is typically 180mA, while standby consumption drops to 100μA.

Feature Summary

• Fully complementary PNP/NPN output configuration enables high power performance without bootstrap capacitors.
• Integrated protections include AC/DC short circuit to ground and supply, overrating chip temperature with soft thermal limiter, load dump voltage tolerance, fortuitous open ground, reverse battery, and ESD protection.
• Features auto-mute detection at minimum supply voltage, standard mute function, and ST-BY mode for low power consumption.

Applications

• High-end car radio applications
• Dual bridge automotive audio systems

Procurement Notes

Verify component status as obsolete before procurement planning. Confirm that the Multiwatt15 vertical pinout matches the target PCB footprint. Ensure design accounts for the specific thermal resistance requirements and derating curves provided in the datasheet for proper heat dissipation under maximum load conditions.

Selection Notes

Select this component for designs requiring a fully complementary output stage without bootstrap capacitors. The internally fixed 32dB gain simplifies the external component count by removing the need for external compensation networks. Verify that the application environment stays within the specified -40°C to 85°C operating temperature range.

Part Context

This part belongs to STMicroelectronics' line of Class AB audio power amplifiers intended for automotive use. It utilizes Multipower BCD technology to achieve high efficiency and reliability in compact sets. The Multiwatt15 package provides a robust mechanical solution for dissipating heat in high-power automotive environments.

Replacement Considerations

No public confirmed substitute part numbers are available in the source material.