TDA7350A

Overview

The TDA7350A is a Class AB audio power amplifier designed for car radio applications, housed in a Multiwatt11 package. It supports stereo or bridge configurations without external switching components. Supply voltage ranges from 8V to 18V. In stereo mode, output power reaches up to 11W per channel into 3.2Ω loads. Bridge mode delivers up to 22W into 4Ω loads. The device features internally fixed gain (30dB stereo), delayed turn-on mute, and comprehensive protection against short circuits, thermal overload, and load dump voltages.

Feature Summary

• Eliminates audible pop noise during power-on and power-off transitions through a delayed turn-on mute circuit.
• Operates in either stereo or bridge configuration without requiring additional external components for mode switching.
• Integrates a fully complementary PNP/NPN output stage that achieves rail-to-rail voltage swing without bootstrap capacitors.
• Includes built-in protections for AC/DC short circuits, thermal shutdown, load dump voltage surges, and fortuitous open ground.

Applications

• Car radio power amplification
• Automotive audio systems
• Bridge-mode speaker driving

Procurement Notes

Verify component obsolescence status before design finalization as the part may be discontinued. Confirm package compatibility with existing PCB footprints, specifically the Multiwatt11 vertical variant. Review datasheet specifications for absolute maximum ratings to ensure system robustness under automotive electrical stress conditions.

Selection Notes

Select this component for designs requiring high output power with minimal external component count. The internal fixed gain simplifies pre-amplifier interface requirements. Ensure adequate heatsinking is provided due to thermal dissipation characteristics. Verify supply voltage stability within the specified operating range to maintain performance.

Part Context

Manufactured by STMicroelectronics, the TDA7350A belongs to the TDA7350 series of automotive audio amplifiers. It utilizes advanced bipolar technology for its output stage, offering improved current capability and cutoff frequency compared to standard lateral PNPs. The device is optimized for space-constrained automotive environments.

Replacement Considerations

No officially confirmed substitute part numbers are documented in the provided source material.