LM4923LQX/NOPB

Audio Amplifiers Overview

The LM4923LQX/NOPB is a mono audio power amplifier manufactured by Texas Instruments, formerly National Semiconductor. It delivers 1.1 watts of output power in a fully differential configuration. The device operates on a single supply voltage ranging from 2.4V to 5.5V. It utilizes an 8-pin WQFN package with an exposed pad for thermal management. The operational temperature range spans from -40°C to +85°C. This Class-AB amplifier integrates shutdown functionality and is designed for space-constrained portable applications.

Audio Amplifiers Feature Summary

• Fully differential amplification architecture
• Ultra-low current shutdown mode
• Capacitive load driving capability
• Space-saving WQFN package

Audio Amplifiers Applications

• Portable multimedia devices
• Mobile phones
• Personal digital assistants
• MP3 players

Audio Amplifiers Procurement Notes

Verify the manufacturer designation as Texas Instruments, which acquired National Semiconductor. Confirm the suffix NOPB indicates lead-free and RoHS compliance. Ensure the package type matches the 8-WQFN specification with an exposed thermal pad. Check that the operating temperature range meets the required environmental conditions for the target application.

Audio Amplifiers Selection Notes

Select this component when a fully differential audio solution is required to minimize noise in portable systems. Consider the 1.1W output power rating relative to the speaker impedance and supply voltage constraints. Evaluate the WQFN package dimensions against available PCB real estate. Verify compatibility with the system's shutdown control logic for power management requirements.

Audio Amplifiers Part Context

This part belongs to the LM4923 family of fully differential audio power amplifiers. It is functionally equivalent to the LM4923MM/NOPB variant, differing primarily in the packaging format. The LM4923 series is designed for low-voltage, high-efficiency audio applications in mobile electronics.

Audio Amplifiers Replacement Considerations

The LM4923MM/NOPB serves as a direct functional substitute with identical electrical characteristics but utilizes a Mini-SOIC package instead of WQFN. Verify pinout compatibility and thermal performance differences between the two packages before substitution.