LM4864MMX/NOPB

Audio Amplifiers Overview

The LM4864MMX/NOPB is a single-channel mono audio power amplifier manufactured by Texas Instruments, formerly National Semiconductor. It operates in Class-AB topology with an analog input type and differential output configuration. The device delivers up to 850 mW of output power into a 4-ohm load, maintaining a total harmonic distortion plus noise of 0.7%. It functions within a supply voltage range of 2.7 V to 5.5 V and draws a typical operating current of 3.6 mA. The component is housed in an 8-pin VSSOP package and supports surface mount installation. It is rated for operation across a temperature range from -40°C to +85°C.

Audio Amplifiers Feature Summary

• Class-AB amplification architecture for analog audio signals
• Integrated thermal protection circuitry
• Shutdown mode capability for power management

Audio Amplifiers Applications

• Portable audio devices requiring low-power amplification
• Mono speaker driver circuits in consumer electronics
• Battery-operated systems utilizing single-supply operation

Audio Amplifiers Procurement Notes

Verify the manufacturer designation as Texas Instruments, which acquired National Semiconductor, when sourcing this component. Confirm the specific suffix NOPB indicates lead-free and RoHS compliance status according to current datasheets. Ensure the VSSOP-8 package variant matches the required PCB footprint. Cross-reference the part number against official distributor catalogs to confirm availability and authenticity before procurement.

Audio Amplifiers Selection Notes

Select this amplifier for applications requiring a single-channel solution with moderate power output in a compact surface-mount package. Consider the 2.7 V minimum supply voltage for compatibility with battery-powered systems. Evaluate the 850 mW output capability against the connected speaker impedance requirements. Verify that the thermal performance under expected operating conditions aligns with the integrated protection features.

Audio Amplifiers Part Context

This component belongs to the LM4864 series of audio amplifiers produced by Texas Instruments. The series includes variants such as LM4864M/NOPB in SOIC-8 packaging. These devices are designed for portable audio applications, offering a balance of performance and power efficiency. The LM4864MMX/NOPB specifically utilizes the smaller VSSOP form factor compared to other series members.

Audio Amplifiers Replacement Considerations

LM4864M/NOPB is a documented alternative in the same family, differing primarily in the SOIC-8 package instead of VSSOP-8.