LM4950TSX/NOPB

The LM4950TSX/NOPB is a high-performance audio amplifier integrated circuit (IC) produced by Texas Instruments. It is designed primarily for portable audio applications, such as mobile phones, tablets, and other battery-operated devices. Here’s a detailed description of its features and specifications:

General Overview

• Type: Class D audio amplifier
• Package: The LM4950TSX/NOPB typically comes in a compact, thermally efficient package, such as a 16-pin TSSOP (Thin Shrink Small Outline Package), which allows for easy integration into space-constrained designs.

Key Features

• Output Power: The LM4950 can deliver up to 1.5W of output power per channel into an 8-ohm load, making it suitable for driving small speakers or headphones.
• Efficiency: As a Class D amplifier, it boasts high efficiency (up to 90% or more), which is crucial for battery-powered applications as it helps to extend battery life.
• Low Distortion: The IC is designed to provide low total harmonic distortion (THD), ensuring high-quality audio reproduction.
• Built-in Protection: It includes features such as thermal shutdown and short-circuit protection, which safeguard the device and connected components from damage.
• Power Supply Voltage: The LM4950 operates over a wide supply voltage range, typically from 2.5V to 5.5V, making it versatile for various applications.
• Integrated Features: The amplifier may include integrated features such as a volume control, mute function, and a built-in charge pump for boosting the supply voltage, which enhances its usability in portable devices.

Electrical Characteristics

• Input Impedance: The input impedance is designed to be compatible with a variety of audio sources, ensuring good signal integrity.
• Signal-to-Noise Ratio (SNR): The IC typically offers a high SNR, which contributes to clearer audio playback by minimizing background noise.
• Frequency Response: The amplifier is engineered to provide a wide frequency response, ensuring that it can accurately reproduce a range of audio frequencies.

Applications

The LM4950TSX/NOPB is ideal for:

• Mobile phones
• Portable speakers
• Tablets
• Laptops
• Other battery-operated audio devices

Conclusion

The LM4950TSX/NOPB from Texas Instruments is a robust and efficient audio amplifier solution that combines high output power, low distortion, and integrated protection features, making it an excellent choice for modern portable audio applications. Its compact design and versatility allow it to be easily integrated into a variety of electronic devices, enhancing the audio experience for users.