STMicroelectronics

TDA7391

TDA7391 Description

The TDA7391 from STMicroelectronics is a Class AB monolithic audio amplifier designed for high-power automotive and consumer audio applications. With a maximum output power of 45W per channel at 3.2Ω, it operates within a supply voltage range of 8V to 18V, making it suitable for 12V automotive systems. Packaged in an 11MULTIWATT through-hole configuration, this RoHS3-compliant device is REACH unaffected and features a Moisture Sensitivity Level (MSL) of 1 (Unlimited), ensuring reliability in harsh environments. Its EAR99 classification and HTSUS 8542.33.0001 designation facilitate global compliance and integration.

TDA7391 Features

• High Output Power: Delivers 45W mono output at 3.2Ω, ideal for driving speakers in space-constrained applications.
• Wide Supply Range (8V–18V): Supports automotive electrical systems with fluctuating voltages.
• Class AB Topology: Balances efficiency and audio fidelity, minimizing distortion.
• Robust Packaging: 11MULTIWATT through-hole design enhances thermal dissipation and mechanical stability.
• Compliance Certifications: RoHS3, REACH Unaffected, and MSL1 ensure environmental and reliability standards.
• Low External Component Count: Simplifies PCB design and reduces BOM costs.

TDA7391 Applications

The TDA7391 excels in automotive audio systems, including head units, external amplifiers, and subwoofer drivers, where high power and reliability are critical. It is also well-suited for consumer audio applications such as home theater systems, powered speakers, and portable PA systems. Its wide voltage range and thermal resilience make it ideal for battery-powered or unstable power supply environments.

Conclusion of TDA7391

The TDA7391 stands out as a high-performance, cost-effective Class AB amplifier for demanding audio applications. Its 45W output, robust packaging, and compliance with automotive standards make it a preferred choice for engineers designing reliable, high-fidelity audio systems. Whether for automotive infotainment or consumer audio, the TDA7391 delivers superior power handling and durability in a compact form factor.