TDA7386

Overview

The TDA7386 is a Class-AB quad-channel audio power amplifier by STMicroelectronics, designed for high-end car radio applications. It operates on an 8V to 18V single supply with a -40°C to 105°C temperature range and 190mA static current. The device delivers up to 45W maximum output per channel into 4Ω loads, with typical outputs of 28W at 14.4V and 24W at 13.2V (1kHz, 10% THD). EIAJ standard output is 40W. It features 26dB fixed internal gain, requiring no external compensation or bootstrap capacitors. Total harmonic distortion plus noise is 0.04%. The unit supports peak currents of 4.5A and dissipates up to 80W in its 25-Flexiwatt vertical through-hole package.

Feature Summary

• Fully complementary PNP/NPN output stage enables rail-to-rail voltage swing without bootstrap capacitors.
• Integrated clipping detector simplifies gain compression operations within the system.
• Comprehensive fault diagnostics detect assembly errors including shorts, thermal shutdown, and reversed battery conditions.
• Fixed 26dB internal gain eliminates the need for external compensation components.

Applications

• High-end automotive radio systems
• Home theater audio setups
• Public broadcasting infrastructure

Procurement Notes

Verify component authenticity carefully as this part is officially discontinued. Confirm package integrity upon receipt, specifically checking the 25-Flexiwatt leads for damage. Ensure replacement designs account for the lack of RoHS compliance if required by current regulations. Validate supplier documentation against original STMicroelectronics datasheets to confirm electrical specifications match the legacy requirements.

Selection Notes

Select this component for designs requiring high-power Class-AB amplification in automotive environments where AEC-Q100 qualification is beneficial. Consider the Flexiwatt-25 package for efficient thermal management in compact enclosures. Evaluate the fixed 26dB gain against input signal levels to ensure proper headroom. Verify that the single-supply operation aligns with the vehicle's electrical architecture and load dump protection needs.

Part Context

This device belongs to STMicroelectronics' specialized line of automotive audio power amplifiers. It utilizes advanced technology to minimize external component count while maximizing output performance. The design focuses on reliability under harsh automotive electrical conditions, integrating multiple protection mechanisms directly onto the silicon die to enhance system robustness.

Replacement Considerations

The TDA7386 is listed as discontinued. No specific public substitute part numbers are confirmed in the provided documentation. Designers should consult official manufacturer channels for end-of-life notifications or equivalent alternative product recommendations.