LM4811MMX/NOPB

The LM4811MMX/NOPB is a high-performance audio amplifier integrated circuit (IC) produced by Texas Instruments. It is designed for portable audio applications, providing a compact and efficient solution for driving speakers or headphones. Here’s a detailed description of its features and specifications:

General Overview:

• Type: Class AB Audio Amplifier
• Package: The LM4811MMX/NOPB comes in a 20-pin TSSOP (Thin Shrink Small Outline Package) form factor, which is suitable for surface-mount technology (SMT) applications. This compact package allows for space-saving designs in portable devices.

Key Features:

• Output Power: The amplifier can deliver up to 1.1W of output power into an 8-ohm load with a power supply voltage of 5V, making it suitable for driving small speakers in portable devices.
• Low Distortion: The LM4811MMX/NOPB features low total harmonic distortion (THD), typically around 0.1%, ensuring high-fidelity audio reproduction.
• Wide Supply Voltage Range: It operates over a supply voltage range of 2.5V to 5.5V, allowing flexibility in design and compatibility with various battery voltages.
• Integrated Features: The IC includes built-in thermal shutdown and short-circuit protection, enhancing reliability and safety in applications.
• Gain Configuration: The amplifier has a fixed gain of 2.5V/V, which simplifies design considerations for audio amplification.
• Low Quiescent Current: The device is designed for low power consumption, with a quiescent current of approximately 10mA, making it ideal for battery-operated devices.

Applications:

The LM4811MMX/NOPB is suitable for a variety of applications, including:

• Portable audio devices (e.g., MP3 players, smartphones)
• Laptop and notebook computers
• Television sets and monitors
• Bluetooth speakers and other wireless audio devices

Electrical Characteristics:

• Input Impedance: The input impedance is typically around 20kΩ, which allows for easy interfacing with various audio sources.
• Output Impedance: The output impedance is low, ensuring good power transfer to the load.
• Frequency Response: The amplifier provides a wide frequency response, typically from 20Hz to 20kHz, covering the full range of human hearing.

Thermal and Mechanical Characteristics:

• Operating Temperature Range: The LM4811MMX/NOPB is rated for operation in a temperature range of -40°C to +85°C, making it suitable for a wide range of environmental conditions.
• Thermal Management: The integrated thermal shutdown feature helps prevent damage due to overheating, ensuring long-term reliability.

Conclusion:

The LM4811MMX/NOPB from Texas Instruments is a versatile and efficient audio amplifier IC that combines high output power, low distortion, and integrated protection features in a compact package. Its design makes it an excellent choice for a variety of portable audio applications, providing designers with a reliable solution for enhancing audio performance in their products.