STMicroelectronics

TS4990ID

TS4990ID Description

The TS4990ID from STMicroelectronics is a Class AB mono audio amplifier designed for compact, low-power audio applications. With a 2.2V to 5.5V supply range, it delivers 1.2W of output power into an 8Ω load, making it ideal for portable and battery-operated devices. Packaged in an 8-pin SOIC (Tube), this surface-mount IC integrates advanced features like depop circuitry, differential inputs, standby mode, and thermal protection, ensuring reliable performance in space-constrained designs. Although marked as Obsolete, it remains a robust choice for legacy systems requiring high-quality audio amplification with minimal distortion.

TS4990ID Features

• Class AB Amplification: Ensures high-fidelity audio with low crossover distortion.
• Wide Voltage Range (2.2V–5.5V): Optimized for battery-powered applications like smartphones, tablets, and portable speakers.
• Integrated Protection: Thermal shutdown and depop circuitry prevent damage during power transitions.
• Differential Inputs: Reduce noise susceptibility, enhancing audio clarity in noisy environments.
• Standby Mode (<1µA): Extends battery life in idle states.
• RoHS3 & REACH Compliant: Meets environmental and safety standards.
• Moisture Sensitivity Level (MSL 3): Requires careful handling but suits industrial and consumer applications.

TS4990ID Applications

• Portable Electronics: Headphones, handheld gaming devices, and Bluetooth speakers.
• Embedded Systems: Audio feedback in IoT devices, wearables, and medical instruments.
• Automotive Accessories: Auxiliary audio systems and navigation voice prompts.
• Legacy Audio Equipment: Replacement or repair of older designs requiring stable, low-voltage amplification.

Conclusion of TS4990ID

The TS4990ID excels in delivering efficient, high-quality audio amplification for low-voltage systems. Its thermal protection, depop suppression, and differential inputs set it apart from basic Class AB amplifiers, while its compact form factor suits space-sensitive designs. Though obsolete, its reliability and compliance make it a viable option for niche applications. Engineers seeking a balance of performance and power efficiency in legacy or portable audio systems will find this IC a pragmatic solution.