STMicroelectronics

TDA1905

TDA1905 Description

The TDA1905 from STMicroelectronics is a Class AB monolithic audio amplifier designed for monophonic (mono) output, delivering 5.5W of power into an 8Ω load. Operating within a wide supply voltage range of 4V to 30V, this IC is well-suited for robust audio applications requiring stable performance across varying power conditions. Packaged in a 16-pin POWERDIP and delivered in tube packaging, the TDA1905 is optimized for through-hole mounting, making it ideal for prototyping and industrial designs. Although marked as obsolete, it remains a reliable choice for legacy systems due to its thermal protection, mute function, and depop suppression, ensuring high-quality audio output with minimal distortion.

TDA1905 Features

• High Output Power: Delivers 5.5W @ 8Ω, suitable for small to medium audio systems.
• Wide Voltage Range: Operates from 4V to 30V, accommodating diverse power supplies.
• Integrated Protection: Features thermal shutdown, mute control, and depop suppression to enhance reliability and audio clarity.
• Low Noise: Class AB architecture ensures low distortion and high signal fidelity.
• Compliance: ROHS3 compliant and REACH unaffected, meeting environmental and safety standards.
• Robust Packaging: 16-pin POWERDIP ensures durability and ease of integration in through-hole designs.

TDA1905 Applications

The TDA1905 excels in low-to-medium power audio amplification scenarios, including:

• Consumer Electronics: Compact radios, portable speakers, and TV audio modules.
• Automotive Audio: Auxiliary amplification for in-car entertainment systems.
• Industrial Systems: Public address (PA) systems, intercoms, and alarm tone generators.
• Legacy Equipment Repair: Ideal for maintaining or replacing obsolete audio amplifiers in older devices.

Conclusion of TDA1905

The TDA1905 is a versatile, Class AB audio amplifier offering a balance of power efficiency, reliability, and sound quality. Its thermal protection, mute function, and depop suppression make it stand out among similar ICs, particularly in applications requiring stable performance under varying voltages. While obsolete, its through-hole design and robust feature set ensure continued relevance in industrial, automotive, and consumer audio systems. For engineers seeking a proven, high-performance mono amplifier, the TDA1905 remains a compelling choice.