LM4809LQ/NOPB

Audio Amplifiers Overview

The LM4809LQ/NOPB is a stereo audio power amplifier manufactured by Texas Instruments, belonging to the Boomer series. It operates on a single supply voltage ranging from 2V to 5.5V and delivers up to 105mW per channel into a 16-ohm load. The device utilizes Class-AB topology and features integrated pop-suppression circuitry to eliminate audible noise during power transitions. It includes thermal shutdown protection and a dedicated shutdown mode for power conservation. The component is housed in an 8-WSON package with dimensions of 2.5x2.5mm and supports surface-mount installation.

Audio Amplifiers Feature Summary

• Integrated pop-suppression circuitry eliminates audible switching noises during power-up and power-down sequences.
• Includes thermal shutdown protection to safeguard the device against excessive junction temperatures.
• Features a low-power shutdown mode designed to extend battery life in portable applications.

Audio Amplifiers Applications

• Mobile phones
• Personal digital assistants (PDAs)
• Portable media players

Audio Amplifiers Procurement Notes

Verify the manufacturer designation as Texas Instruments, which acquired National Semiconductor, when sourcing this component. Confirm the specific suffix 'LQ' corresponds to the LLP-8 or WSON package variant required for your PCB layout. Ensure RoHS compliance documentation matches the NOPB suffix. Cross-reference the datasheet revision history to confirm pinout compatibility with existing designs.

Audio Amplifiers Selection Notes

Select this amplifier for applications requiring stereo output in a minimal footprint. It is suitable for systems operating within the 2V to 5.5V range. Consider the 105mW output capability relative to the connected speaker impedance. Evaluate the need for external components versus the internal protection features. Compare package availability against design constraints for surface-mount assembly.

Audio Amplifiers Part Context

This component is part of the LM4809 family of audio amplifiers. It serves as a stereo solution for low-power consumer electronics. The device replaces older discrete amplifier designs with an integrated IC solution. It offers a balance of performance and power efficiency for battery-operated devices.

Audio Amplifiers Replacement Considerations

LM4809LDX/NOPB is a documented substitute with identical electrical specifications but packaged in an 8-WSON format instead of the LQ variant. Verify package dimensions and thermal characteristics before substitution.