LM4871MX

Audio Amplifiers Overview

The LM4871MX is a mono bridged audio power amplifier from the Boomer series, manufactured by Texas Instruments. It delivers 3W of continuous average power into a 3Ω load with less than 10% THD at 5V supply. The device operates on a single supply voltage ranging from 2V to 5.5V and features Class-AB topology. It utilizes an 8-pin SOIC package in tape and reel format. Key electrical parameters include a typical shutdown current of 0.6µA and a power supply rejection ratio of 60dB. The operational temperature range spans from -40°C to +85°C.

Audio Amplifiers Feature Summary

• Micropower shutdown mode for significant energy conservation in portable applications
• Filter-free design eliminating the need for output coupling capacitors or bootstrap networks
• Integrated thermal shutdown protection to safeguard against overheating
• Pop-and-click suppression circuitry to minimize audible noise during power transitions

Audio Amplifiers Applications

• Portable communication devices such as mobile phones
• Personal digital assistants (PDAs)
• MP3 players and portable media devices
• Laptop computers and notebook PCs

Audio Amplifiers Procurement Notes

Verify that the component is sourced directly from authorized distributors or the manufacturer to ensure authenticity. Confirm the specific suffix MX indicates the tape and reel packaging variant rather than tube packaging. Check RoHS compliance status and verify the operating temperature range matches industrial specifications if required for your application environment.

Audio Amplifiers Selection Notes

Select this amplifier when high efficiency and minimal external component count are critical for space-constrained designs. It is suitable for systems requiring bridge-tied-load (BTL) output without large filter capacitors. Ensure the load impedance and supply voltage align with the 3W performance metrics. Consider the SOIC-8 package constraints for thermal management and PCB layout requirements.

Audio Amplifiers Part Context

The LM4871MX belongs to the Texas Instruments Boomer series of audio amplifiers. This family focuses on delivering high-fidelity audio performance with low power consumption. The device is designed to replace older solutions requiring complex output filtering, offering a simplified design approach for modern portable electronics while maintaining robust audio quality.

Audio Amplifiers Replacement Considerations

LM4871M/NOPB: Tube packaged version of the same functional device.

Audio Amplifiers FAQ

Does the LM4871MX require output coupling capacitors?

No, the LM4871MX is a filter-free amplifier that does not require output coupling capacitors, bootstrap capacitors, or buffer networks.

How is the shutdown mode activated?

The micropower shutdown mode is activated by applying VDD to the SHUTDOWN pin, reducing the quiescent current to approximately 0.6µA.