TDA7385H

Overview

The TDA7385H is a Class-AB audio power amplifier designed for high-end car radio applications. It features four bridge-connected channels delivering up to 37W per channel into a 4-ohm load, with a maximum output capability of 42W per channel. The device operates on a single supply voltage ranging from 8V to 18V and utilizes a Flexiwatt 25 package. Key electrical specifications include a total harmonic distortion plus noise (THD+N) of 0.04% and an output current capacity of 5.5A. It incorporates internal protections against short circuits, thermal overload, and reversed battery conditions.

Feature Summary

• Integrated clipping detector simplifies gain compression operations
• Complementary PNP/NPN configuration enables rail-to-rail output swing without bootstrap capacitors
• Built-in diagnostics detect faults such as output shorts, thermal shutdown, and reversed battery connections
• Supports standby and mute functions with automute at minimum supply voltage detection

Applications

• High-end automotive radio systems
• Car audio amplification
• Vehicle infotainment center integration

Procurement Notes

Verify the specific suffix 'H' against the manufacturer's official datasheet to confirm pinout orientation and mechanical dimensions, as variations exist within the TDA7385 family. Ensure compatibility with the target PCB footprint, specifically the Flexiwatt 25 package type. Confirm RoHS compliance status and AEC-Q100 qualification requirements for your specific automotive grade needs before finalizing procurement.

Selection Notes

Select this component when designing compact automotive audio systems requiring high power density without external bootstrap capacitors. The internally fixed gain of 26dB reduces external component count. Consider the TDA7385H for applications needing robust fault diagnostics and protection against inductive loads and load dump voltages, ensuring reliable operation in harsh vehicle environments.

Part Context

The TDA7385H belongs to the TDA7385 series of Class-AB audio power amplifiers manufactured by STMicroelectronics. This series is engineered specifically for demanding automotive environments, offering high output power in a compact package. The H variant typically denotes a specific pin configuration or packaging orientation within the Flexiwatt 25 family, distinct from other variants like the E-TDA7385.

Replacement Considerations

Direct substitutes within the same family include the standard TDA7385 and the E-TDA7385. Verify that any replacement part matches the exact Flexiwatt 25 pinout and thermal characteristics. Cross-reference with similar quad-bridge amplifiers like the TDA7388A if higher power or different diagnostic interfaces are required.