E-TDA7385

Audio Amplifiers Overview

The E-TDA7385 is an AB class audio power amplifier designed for high-end car radio applications. It features a fully complementary PNP/NPN configuration enabling rail-to-rail output voltage swing without bootstrap capacitors. The device delivers up to 4 x 42 W at 4 Ω maximum, or 4 x 23 W at 14.4 V with 10% THD+N. It operates on a supply voltage range of 8 V to 18 V and includes an internal fixed gain of 26 dB. Packaged in a 25-pin Flexiwatt format, it integrates clipping detection, standby, mute, and comprehensive fault diagnostics.

Audio Amplifiers Feature Summary

• Fully complementary PNP/NPN architecture allows rail-to-rail output swing without external bootstrap capacitors.
• Integrated clipping detector simplifies gain compression operations for audio optimization.
• Comprehensive fault diagnostics detect assembly errors including shorts to ground, supply, thermal shutdown, and reversed battery conditions.
• Low external component count due to internally fixed gain and absence of external compensation requirements.

Audio Amplifiers Applications

• High-end automotive radio systems
• Quad bridge car audio amplification
• Automotive infotainment audio processing

Audio Amplifiers Procurement Notes

Verify the specific suffix designation when ordering, as package orientation (horizontal vs. vertical) may vary between variants such as TDA7385H and E-TDA7385. Confirm RoHS compliance status, as original TDA7385 units are obsolete and non-compliant, while the E-TDA7385 variant meets current environmental standards. Ensure the selected part matches the required Flexiwatt 25 pin configuration for your PCB layout.

Audio Amplifiers Selection Notes

Select the E-TDA7385 over the obsolete TDA7385 to ensure RoHS3 compliance and continued availability. Choose this component for designs requiring high output power with minimal external passive components. The integrated diagnostics and automute functions reduce system complexity compared to discrete solutions. Verify that the application supports the 8 V to 18 V supply range and utilizes 4 Ω loads for optimal performance specifications.

Audio Amplifiers Part Context

The E-TDA7385 serves as the active, compliant successor to the discontinued TDA7385 series. While the original TDA7385 is marked as obsolete, the E-TDA7385 maintains functional compatibility within the same product family. It belongs to STMicroelectronics' portfolio of Class-AB automotive audio amplifiers, specifically engineered for robust operation in vehicle electrical environments with high noise and voltage transients.

Audio Amplifiers Replacement Considerations

The E-TDA7385 is the direct replacement for the obsolete TDA7385. The TDA7388 is listed as a similar alternative by distributors, though specific parameter matching should be verified against design requirements before substitution.

Audio Amplifiers FAQ

Does the E-TDA7385 require bootstrap capacitors?

No, the fully complementary PNP/NPN configuration allows for rail-to-rail output voltage swing without the need for bootstrap capacitors.

What diagnostic capabilities are included?

The device includes diagnostics for clipping, output short to ground, output short to supply, thermal shutdown, automute at minimum supply voltage, reversed battery, and fortuitous open ground.