LM3880

The LM3880 is a high-performance audio power amplifier manufactured by Texas Instruments, designed for delivering clean and efficient audio output in a wide range of applications. It features a class AB topology that provides low distortion and high efficiency, making it ideal for both consumer and professional audio systems. The device operates from a single supply voltage ranging from 6 V to 24 V, enabling flexible integration into various power environments without the need for dual supplies. Core specifications include a maximum output power of 15 W into an 8 Ω load at 10% THD, with a total harmonic distortion (THD) as low as 0.05%, ensuring high-fidelity sound reproduction. The LM3880 incorporates thermal shutdown protection and current limiting to safeguard against overheating and short-circuit conditions, enhancing system reliability under adverse operating conditions. Its wide bandwidth of 20 kHz ensures accurate frequency response across the entire audible spectrum, while the high slew rate of 25 V/μs supports fast transient response for dynamic audio signals. Key features include a built-in soft-start circuit that minimizes inrush current during power-up, reducing stress on the power supply and connected components. The chip also includes a mute function for silent switching between audio sources or during startup/shutdown sequences. With a low quiescent current of approximately 12 mA per channel, the LM3880 maintains energy efficiency even in standby mode, which is beneficial for battery-powered or eco-conscious designs. This amplifier is commonly used in home audio equipment such as stereo receivers, powered speakers, and portable sound systems. It is also suitable for automotive audio systems, public address systems, and professional audio installations where consistent performance and robustness are critical. Due to its compact package (SO-16), ease of use, and minimal external component requirements, the LM3880 simplifies circuit design and reduces overall board space, making it an attractive choice for engineers developing cost-effective yet high-quality audio solutions.