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BA5406

BA5406 Description

The BA5406 from ROHM Semiconductor is a Class AB stereo audio amplifier IC designed to deliver 5W per channel into a 3Ω load, making it suitable for medium-power audio applications. Operating within a 5V to 15V supply range, this through-hole-mounted device is optimized for robust performance in consumer electronics. Although marked as Obsolete, it remains a reliable choice for legacy designs due to its depop (pop noise suppression) feature, which enhances audio clarity during power-on/off transitions. The IC is ROHS3 Compliant and REACH Unaffected, ensuring environmental compliance. Packaged in a 12-pin SIP (Single In-line Package) and shipped in tubes, it is ideal for prototyping and small-scale production.

BA5406 Features

• Class AB Amplification: Ensures high-fidelity audio output with low distortion.
• Depop Circuitry: Minimizes audible noise during startup/shutdown, improving user experience.
• Wide Supply Range (5V–15V): Offers flexibility in various power supply configurations.
• High Output Power: 5W x 2 channels @ 3Ω for driving small speakers efficiently.
• Robust Packaging: 12SIP through-hole design for easy integration into PCB layouts.
• Compliance: ROHS3, REACH Unaffected, and ECCN EAR99 for global market suitability.

BA5406 Applications

The BA5406 excels in portable audio systems, desktop speakers, and multimedia devices where moderate power output and noise suppression are critical. Its depop feature makes it ideal for battery-powered applications (e.g., boomboxes, karaoke machines) where transient noise must be minimized. The through-hole design suits legacy repairs, educational kits, and DIY audio projects. While newer Class D alternatives exist, the BA5406’s simplicity and proven performance keep it relevant in cost-sensitive or noise-sensitive designs.

Conclusion of BA5406

The BA5406 is a discontinued but dependable stereo amplifier IC, offering 5W/channel output, depop suppression, and wide voltage compatibility. Its Class AB architecture ensures clean audio reproduction, while the 12SIP package simplifies assembly. Though obsolete, it remains a pragmatic choice for low-complexity audio systems, legacy upgrades, and educational applications where reliability and ease of use outweigh the need for cutting-edge efficiency. Engineers valuing noise-free operation and straightforward implementation may still find it a viable solution.