STMicroelectronics

TDA7391PD

TDA7391PD Description

The TDA7391PD is a Class AB monolithic audio power amplifier from STMicroelectronics, designed for high-performance single-channel audio applications. With a maximum output power of 40W at 3.2Ω, it operates within a supply voltage range of 8V to 18V, making it suitable for automotive and consumer audio systems. Packaged in a PowerSO-20 tube, this surface-mount IC is RoHS3 compliant and adheres to REACH Unaffected standards, ensuring environmental and regulatory compliance. Although marked as obsolete, it remains a reliable choice for legacy designs requiring robust amplification with low distortion.

TDA7391PD Features

• High Power Output: Delivers 40W mono output at 3.2Ω, ideal for driving speakers in compact audio systems.
• Wide Voltage Range (8V–18V): Supports flexible power supply configurations, including automotive 12V systems.
• Class AB Topology: Balances efficiency and audio fidelity with low crossover distortion.
• Robust Packaging: PowerSO-20 ensures efficient thermal dissipation and mechanical durability.
• Compliance: ROHS3, REACH Unaffected, and ECCN EAR99 certified for global market compatibility.
• Moisture Sensitivity Level (MSL 1): Suitable for extended storage and handling without moisture concerns.

TDA7391PD Applications

• Automotive Audio Systems: Powers in-car speakers, subwoofers, and infotainment systems due to its wide voltage tolerance.
• Consumer Electronics: Used in home theater amplifiers, portable speakers, and multimedia devices requiring moderate power.
• Legacy Audio Equipment: Ideal for servicing or upgrading older audio systems where high-quality amplification is critical.
• Industrial Audio Solutions: Deployed in public address (PA) systems and industrial audio interfaces requiring reliable performance.

Conclusion of TDA7391PD

The TDA7391PD is a high-power, single-channel Class AB amplifier offering a blend of performance and durability. While obsolete, its 40W output, wide voltage range, and compliance certifications make it a viable option for automotive, consumer, and industrial audio applications. Engineers seeking a thermally efficient, surface-mount amplifier with proven reliability will find this IC well-suited for legacy or specialized designs. For modern replacements, STMicroelectronics' newer Class D amplifiers may offer higher efficiency, but the TDA7391PD remains a solid choice for specific use cases.