LM4915LQ

Audio Amplifiers Overview

The LM4915LQ is a pseudo-differential mono headphone amplifier manufactured by National Semiconductor. It features a fixed gain of 6dB and operates as a Class-AB output stage. The device is designed for low-voltage applications, supporting a supply voltage range from 2.2V to 5.5V. It delivers an output power of 400mW into a 32-ohm load. The component utilizes an LLP-8 package suitable for surface-mount installation. Operating temperatures are specified between -40°C and +85°C.

Audio Amplifiers Feature Summary

• Pseudo-differential input architecture for noise rejection
• Fixed 6dB internal gain setting
• Class-AB output topology for audio fidelity
• Integrated shutdown capability

Audio Amplifiers Applications

• Portable media players
• Mobile phones
• Personal digital assistants

Audio Amplifiers Procurement Notes

Verify the manufacturer designation carefully, as Texas Instruments acquired National Semiconductor's analog business. Ensure the specific suffix matches the required package and temperature grade. Confirm RoHS compliance status through official documentation prior to integration. Cross-reference datasheet revisions to ensure pinout compatibility with existing designs.

Audio Amplifiers Selection Notes

Select this component for single-channel audio paths requiring moderate power output in space-constrained devices. The fixed gain simplifies circuit design by reducing external component count. Evaluate the 32-ohm load impedance match against target speaker specifications. Consider the LLP-8 footprint constraints during PCB layout planning.

Audio Amplifiers Part Context

This part belongs to the LM4915 family of audio amplifiers. It serves as a dedicated solution for driving headphones in battery-powered portable electronics. The technology focuses on balancing audio performance with power efficiency. It represents a standard offering for mono headphone driver applications in consumer electronics.

Audio Amplifiers Replacement Considerations

LM4915LQX/NOPB