TDA7391LV

Overview

The TDA7391LV is a bridge Class-AB audio power amplifier designed for automotive radio applications. It delivers up to 45 W into a 3.2 Ω load and 40 W into a 4 Ω load. The device operates within a supply voltage range of 6 V to 18 V, supporting low-voltage 'start-stop' profiles. Key electrical specifications include a THD+N of 0.05% and a gain-bandwidth product of 75 kHz. It features differential or single-ended inputs, an on-board clipping detector, and comprehensive protection mechanisms including short circuit, thermal, and load dump safeguards.

Feature Summary

• Supports both differential and single-ended input signal configurations for flexible integration.
• Includes an integrated clipping detector to facilitate the implementation of gain compression systems.
• Features a fully complementary output stage with internal fixed gain to minimize external component requirements.
• Compliant with automotive OEM specifications for low voltage operation during engine stop conditions.

Applications

• High-power car radio amplifiers
• Automotive audio systems requiring start-stop compatibility
• Vehicle infotainment units with e-call functionality

Procurement Notes

Verify current availability status as the component may be subject to obsolescence notices. Confirm package orientation and pinout compatibility with existing PCB footprints. Ensure design accounts for thermal dissipation requirements given the through-hole Multiwatt-11 packaging. Validate that the selected supplier provides genuine STMicroelectronics parts with appropriate traceability documentation.

Selection Notes

Select this amplifier for designs requiring high output power in a single-channel configuration. It is suitable for applications needing robust protection against inductive loads and open ground conditions. Consider the low-voltage operation capability if the system must function reliably during battery cranking or start-stop events. Verify that the required gain and input sensitivity match the preceding audio source stage.

Part Context

The TDA7391LV belongs to the TDA7391 series of automotive Class-AB audio power amplifiers. It is part of STMicroelectronics' portfolio dedicated to vehicle audio solutions. The device shares functional similarities with other members of the family but is distinguished by its specific low-voltage operation capabilities and output power ratings tailored for modern car radio architectures.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult official STMicroelectronics resources for potential end-of-life alternatives or newer generation replacements compatible with the same application constraints.