LM4863N

Audio Amplifiers Overview

The LM4863N is a dual audio amplifier manufactured by National Semiconductor, now part of Texas Instruments. It integrates two independent Class-AB amplifiers capable of delivering 2.2W of continuous average power into an 8Ω load with less than 1% total harmonic distortion plus noise at a 5V supply voltage. The device also incorporates a stereo headphone amplifier function. Designed for portable applications, it operates from a single power supply ranging from 2.7V to 5.5V. The component utilizes a WSON-10 package and supports shutdown modes to minimize current consumption during standby periods.

Audio Amplifiers Feature Summary

• Integrates dual 2.2W audio amplifiers and a stereo headphone driver within a single compact package
• Operates efficiently on a single low-voltage power supply suitable for battery-powered devices
• Includes integrated shutdown functionality to reduce power consumption in standby states

Audio Amplifiers Applications

• Portable media players requiring high-fidelity audio output
• Mobile phones and smartphones with integrated audio capabilities
• Personal digital assistants (PDAs) and handheld gaming consoles

Audio Amplifiers Procurement Notes

Verify the manufacturer origin as National Semiconductor or Texas Instruments, noting that TI acquired NS. Confirm the specific suffix 'N' corresponds to the intended package variant, typically WSON-10. Ensure compatibility with the required operating voltage range of 2.7V to 5.5V. Check for RoHS compliance status if environmental regulations apply to your deployment. Validate pinout configurations against your schematic design before integration.

Audio Amplifiers Selection Notes

Select this component when designing systems requiring dual channel audio amplification alongside headphone driving capability without consuming excessive board space. It is appropriate for applications needing high efficiency and low distortion under single-supply conditions. Consider the thermal performance of the WSON-10 package relative to your enclosure constraints. Evaluate the shutdown current specifications against your device's battery life requirements.

Audio Amplifiers Part Context

The LM4863 belongs to the family of audio power amplifiers designed for consumer electronics. It succeeded earlier models by offering higher power density and integrated headphone functionality. National Semiconductor developed this series to address the growing demand for compact, high-performance audio solutions in mobile devices. The technology reflects advancements in Class-AB amplifier design optimized for low-voltage operation.

Audio Amplifiers FAQ

What is the maximum supply voltage for the LM4863N?

The device supports a supply voltage range from 2.7V to 5.5V.

Does the LM4863N include protection features?

Yes, the datasheet indicates the inclusion of short-circuit protection and thermal shutdown mechanisms.