LM4805LQ/NOPB

Audio Amplifiers Overview

The LM4805LQ/NOPB is a single-channel Class AB audio amplifier manufactured by National Semiconductor. It delivers 1.2W of output power into an 8-ohm load. The device operates within a supply voltage range of 2.7V to 6.1V, supporting low-voltage and battery-powered applications. It utilizes a 28-WQFN (5x5) package with an exposed pad for thermal management.

Audio Amplifiers Feature Summary

• Class AB topology for high-fidelity audio reproduction
• Single-channel mono output configuration
• Compatible with wide supply voltage ranges

Audio Amplifiers Applications

• Battery-powered portable audio devices
• Low-voltage consumer electronics
• Mono audio systems requiring compact form factors

Audio Amplifiers Procurement Notes

Verify the manufacturer designation as National Semiconductor or Texas Instruments, as TI acquired NS. Confirm the specific suffix NOPB indicates lead-free compliance. Ensure the package type matches the 28-WQFN specification. Cross-reference the datasheet version to confirm electrical characteristics align with project requirements before procurement.

Audio Amplifiers Selection Notes

Select this component for mono audio applications requiring a balance between power output and efficiency in low-voltage environments. The 28-WQFN package suits space-constrained designs. Verify that the 8-ohm load impedance matches the speaker specifications. Consider thermal dissipation requirements due to the exposed pad design for reliable operation under continuous load.

Audio Amplifiers Part Context

This part belongs to the LM4805 series of audio amplifiers from National Semiconductor. The series is designed for portable audio applications where power efficiency and sound quality are critical. The LM4805LQ/NOPB variant specifically denotes the lead-free compliant version housed in the 28-pin WQFN package, distinguishing it from other package options within the same functional family.

Audio Amplifiers Replacement Considerations

Check for direct pin-compatible substitutes within the LM4805 family. Verify if newer revisions from Texas Instruments offer equivalent performance. Ensure any replacement maintains the 28-WQFN footprint and Class AB characteristics. Confirm supply voltage compatibility with existing circuit designs.