Texas Instruments

LM4838LQ/NOPB

LM4838LQ/NOPB Description

The LM4838LQ/NOPB is a high-performance Class AB audio amplifier from Texas Instruments, designed to deliver robust audio performance in a compact surface-mount package. This amplifier is part of the Boomer® series, known for its excellent sound quality and efficiency. The LM4838LQ/NOPB supports a wide supply voltage range of 2.7V to 5.5V, making it suitable for various power supply configurations.

The amplifier is capable of delivering a maximum output power of 2.2W per channel into a 3Ω load, and 95mW per channel into a 32Ω load. This versatility in output power makes it ideal for applications requiring different load impedances, such as portable audio devices and small form-factor speakers.

LM4838LQ/NOPB Features

The LM4838LQ/NOPB offers several advanced features that enhance its performance and usability:

• Depop and Mute: These features help in reducing unwanted noise during power-up and power-down cycles, ensuring a clean and quiet audio experience.
• Shutdown: The shutdown feature 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 protects the amplifier from overheating, ensuring reliable operation under various operating conditions.
• Volume Control: The LM4838LQ/NOPB includes volume control capabilities, allowing users to adjust the audio output level as needed.

The amplifier is packaged in a 28-WQFN package, which is available in tape and reel format, facilitating easy handling and assembly in automated manufacturing processes. The LM4838LQ/NOPB is REACH unaffected and RoHS3 compliant, ensuring environmental safety and regulatory compliance.

LM4838LQ/NOPB Applications

The LM4838LQ/NOPB is well-suited for a variety of applications where high-quality audio output and efficient power management are critical. Some specific use cases include:

• Portable Audio Devices: The wide supply voltage range and low power consumption make it ideal for battery-powered devices such as smartphones, tablets, and portable media players.
• Small Form-Factor Speakers: The ability to drive both low and high impedance loads allows it to be used in compact speaker systems, ensuring high-quality audio output regardless of the speaker size.
• Audio Accessories: The LM4838LQ/NOPB can be used in various audio accessories, such as Bluetooth speakers, wireless headphones, and soundbars, where space and power efficiency are important considerations.

Conclusion of LM4838LQ/NOPB

The LM4838LQ/NOPB is a versatile and high-performance Class AB audio amplifier that offers a combination of robust features and efficient power management. Its ability to deliver high output power into different load impedances, along with advanced features like depop, mute, shutdown, thermal protection, and volume control, make it a reliable choice for a wide range of audio applications. Despite being marked as obsolete, the LM4838LQ/NOPB remains a valuable component for designers looking to integrate high-quality audio capabilities into their products.