The LM4881N is a Boomer® audio power amplifier from National Semiconductor (now Texas Instruments). It is designed for driving headphones or small speakers in portable audio devices, offering low distortion and high output power. It is commonly used in MP3 players, portable CD players, and mobile phones.

Applications

• MP3 players
• Portable CD players
• Mobile phones
• Laptop computers
• Personal digital assistants (PDAs)

Features

• Integrated stereo headphone amplifier
• Low THD+N (Total Harmonic Distortion + Noise)
• Output power of 105mW per channel into 32Ω
• Shutdown mode with low current consumption
• Short-circuit protection
• Thermal shutdown protection

Benefits

• High-quality audio reproduction with low distortion.
• Sufficient output power for driving headphones or small speakers.
• Extended battery life with low shutdown current consumption.
• Protection against damage from short circuits and overheating.
• Compact design for portable applications.

Additional Details

The LM4881N features a typical output power of 105mW per channel into a 32Ω load. It has a low THD+N, typically less than 0.1% at 1kHz. The shutdown mode reduces current consumption to less than 1µA. The short-circuit and thermal shutdown protections ensure reliable operation. It is suitable for a wide range of portable audio applications, providing high-quality audio amplification. The amplifier operates from a single 5V power supply and is available in a DIP package. It requires minimal external components, simplifying circuit design. The LM4881N provides a cost-effective and high-performance solution for portable audio amplification needs.