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LM4864N

LM4864N Description

The LM4864N is a high-performance audio amplifier from National Semiconductor, part of the renowned Boomer® series. This Class AB amplifier is designed to deliver a maximum output power of 725mW per channel into an 8-ohm load, making it suitable for applications requiring high-quality audio output. The LM4864N operates within a supply voltage range of 2.7V to 5.5V, ensuring compatibility with a variety of power supply configurations.

The LM4864N is housed in a through-hole package, specifically a tube, which facilitates easy integration into printed circuit boards. Despite its obsolescence, the LM4864N remains a popular choice for its robust design and reliable performance. It is classified under the ECCN code EAR99 and falls under the HTSUS code 8542.33.0001, indicating its compliance with international trade regulations.

LM4864N Features

The LM4864N offers several unique features that set it apart from other audio amplifiers in the market. Key features include:

• Shutdown Functionality: The LM4864N incorporates a shutdown feature that allows the amplifier to be powered down when not in use, significantly reducing power consumption and extending battery life in portable applications.
• Thermal Protection: This feature ensures the amplifier operates within safe temperature limits, preventing thermal runaway and potential damage to the device. This is particularly important in applications where the amplifier may be subjected to high power levels or prolonged operation.
• Wide Supply Voltage Range: The ability to operate from 2.7V to 5.5V makes the LM4864N versatile and suitable for a wide range of power supply configurations, including those in battery-powered devices.

LM4864N Applications

The LM4864N is ideal for a variety of applications where high-quality audio output is required. Some specific use cases include:

• Portable Audio Devices: The LM4864N's low power consumption and shutdown feature make it suitable for portable audio devices such as MP3 players, smartphones, and tablets, where battery life and audio quality are critical.
• Consumer Electronics: The amplifier can be used in consumer electronics like radios, televisions, and home theater systems, providing high-fidelity audio output.
• Automotive Applications: The robust design and wide operating voltage range make the LM4864N suitable for automotive audio systems, where it can handle the varying power supply conditions and provide reliable performance.

Conclusion of LM4864N

In summary, the LM4864N is a versatile and reliable audio amplifier that offers high performance and several unique features. Despite being obsolete, its robust design, wide supply voltage range, and thermal protection make it a preferred choice for applications requiring high-quality audio output. The shutdown feature further enhances its suitability for portable devices, making it a valuable component in the electronics industry.