TDA7387

Overview

The TDA7387 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 a maximum output power of 4 x 41 W into 4 Ω loads. Key electrical parameters include an internally fixed gain of 26 dB and operation within an 18 V to 28 V DC supply range, supporting up to 36 W output in specific configurations.

Feature Summary

• Supports standby and mute functions with automute capability at minimum supply voltage detection
• Integrates comprehensive protection mechanisms including output short circuit, over-temperature soft thermal limiter, load dump, reversed battery, and fortuitous open ground protection
• Utilizes a fully complementary PNP/NPN architecture to achieve rail-to-rail output swing without requiring external bootstrap capacitors

Applications

• High-end automotive radio systems
• Car audio power amplification
• Compact vehicle infotainment setups requiring reduced boundary component count

Procurement Notes

Verify the exact ordering suffix against the manufacturer's official datasheet to ensure correct package variant and temperature rating. Confirm that the specified part number matches the required Flexiwatt-25 packaging type. Cross-reference the manufacturer code with authorized distribution channels to validate authenticity. Ensure the procurement documentation aligns with the specific revision level indicated in the technical specifications.

Selection Notes

Select this component for designs requiring high output power with minimal external passive components. The absence of bootstrap capacitors simplifies the printed circuit board layout and reduces overall system size. The integrated protections make it suitable for harsh automotive electrical environments. Verify that the application load impedance matches the 4 Ω specification for optimal performance.

Part Context

This component belongs to STMicroelectronics' portfolio of Class-AB automotive audio power amplifiers. It is engineered specifically for vehicle infotainment systems where reliability and compact form factors are critical. The design focuses on reducing external component count while maintaining high fidelity audio output capabilities suitable for premium car radio installations.

Replacement Considerations

Consult official substitution guides for compatible quad bridge amplifiers such as the TDA7388 or TDA7388A. Verify pin compatibility and thermal requirements before replacing existing designs with these alternative models.