LM4880M

Audio Amplifiers Overview

The LM4880M is a dual-channel Class-AB audio power amplifier manufactured by Texas Instruments, formerly National Semiconductor. It delivers 250 mW of output power into an 8-ohm load with a total harmonic distortion plus noise of 0.02%. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V and draws a typical quiescent current of 3.6 mA. It features a shutdown mode for power management and includes internal frequency compensation. The component is housed in an SOIC-8 surface-mount package and supports operation across a temperature range of -40°C to +85°C.

Audio Amplifiers Feature Summary

• Dual-channel stereo configuration designed for low-power audio applications
• Integrated Class-AB output stage providing high efficiency and low distortion
• Built-in frequency compensation eliminates the need for external components
• Shutdown pin functionality enables effective power conservation

Audio Amplifiers Applications

• Portable MP3 players and digital audio players
• Mobile phones and handheld communication devices
• Personal navigation systems (PNDs)
• Small portable speakers and subwoofers

Audio Amplifiers Procurement Notes

Verify the manufacturer designation carefully, as Texas Instruments acquired National Semiconductor. Ensure the specific suffix matches your requirements; for example, 'NOPB' indicates lead-free and RoHS compliance. Confirm the package type corresponds to your PCB footprint, typically SOIC-8 for this series. Cross-reference datasheet revisions to ensure compatibility with existing design parameters.

Audio Amplifiers Selection Notes

Select this component when a compact, dual-channel solution is required for battery-operated devices. It is suitable for applications demanding low standby current and minimal external circuitry due to integrated compensation. Consider the thermal performance within the SOIC-8 package if operating near maximum voltage or load conditions. Verify that the 2.7 V minimum supply voltage aligns with the system's battery profile.

Audio Amplifiers Part Context

This part belongs to the LM4880 family of audio amplifiers. It serves as a direct replacement for older National Semiconductor branded units. The MX suffix denotes tape and reel packaging, while other suffixes may indicate tube or cut tape options. The core electrical characteristics remain consistent across the family variants.

Audio Amplifiers Replacement Considerations

LM4880MX/NOPB

Audio Amplifiers FAQ

Does the LM4880M require external feedback capacitors?

No, the device features internal frequency compensation, which reduces the number of external components required for stable operation.

What is the purpose of the shutdown pin?

The shutdown pin allows the user to place the amplifier in a low-power standby mode, significantly reducing current consumption when the audio is not in use.