TDA7383

Overview

The TDA7383 is a Class AB quad bridge audio power amplifier in Flexiwatt 25 package. It delivers up to 4 x 35W max or 4 x 30W EIAJ into 4Ω loads. Electrical characteristics include a fixed voltage gain of 32 dB, output offset voltage of 200 mV, and quiescent current of 180-300 mA. Operating supply voltage ranges from 8V to 18V DC, with peak handling up to 50V. The device features low distortion (0.05% at 4W) and high supply voltage rejection.

Feature Summary

• Fully complementary PNP/NPN output configuration enabling rail-to-rail swing without bootstrap capacitors
• Integrated diagnostics facility detecting clipping, thermal shutdown proximity, and output shorts
• On-board clipping detector simplifies gain compression operations for audio processing
• Low external component count due to internally fixed gain and no need for external compensation

Applications

• High-end car radio applications
• Quad bridge automotive audio systems
• Vehicle sound system power amplification

Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors. Confirm the specific Flexiwatt 25 package variant matches design requirements. Check for obsolete status indicators as this part may be discontinued. Ensure proper thermal management solutions are integrated given the power dissipation ratings. Validate all electrical parameters against the official datasheet before integration.

Selection Notes

Select this amplifier for designs requiring high output power with minimal external components. The fixed 32 dB gain eliminates the need for external feedback networks. Consider the Flexiwatt 25 package for efficient heat dissipation in compact automotive enclosures. Ensure the application supports the required 14.4V nominal supply voltage for optimal performance metrics.

Part Context

This component belongs to the TDA73xx series of automotive audio amplifiers by STMicroelectronics. It is designed specifically for demanding car radio environments. The Flexiwatt 25 package provides robust mechanical stability and thermal performance. It represents a solution for multi-channel audio distribution in vehicle infotainment systems.

Replacement Considerations

Public confirmed substitute part numbers: None identified in source material.