LM4890IBL

Audio Amplifiers Overview

The LM4890IBL is a monolithic audio power amplifier manufactured by National Semiconductor, now part of Texas Instruments. It is designed to deliver 1 watt of continuous average power into an 8-ohm load with a 5-volt supply and less than 1 percent total harmonic distortion plus noise. The device operates from a single power supply ranging from 2.7 volts to 6 volts. It incorporates output protection circuitry against short circuits and thermal overload conditions. The component utilizes a compact SOT-23-6 surface-mount package.

Audio Amplifiers Feature Summary

• Single-supply operation capability for simplified system design
• Integrated short-circuit and thermal overload protection
• Low external component count requiring minimal support circuitry

Audio Amplifiers Applications

• Portable multimedia devices
• Personal digital assistants
• Mobile telephones

Audio Amplifiers Procurement Notes

Verify the manufacturer designation as National Semiconductor or Texas Instruments on the component marking. Confirm the suffix IBL corresponds to the specific temperature range and packaging variant. Ensure RoHS compliance status matches project requirements. Cross-reference the datasheet revision date to confirm technical specifications have not changed.

Audio Amplifiers Selection Notes

Select this component when a low-cost, single-supply audio solution is required for battery-powered applications. It is suitable for systems needing approximately 1 watt of output power into standard 8-ohm speakers. Consider the SOT-23-6 package constraints for thermal management in enclosed spaces compared to larger packages.

Audio Amplifiers Part Context

This device belongs to the LM489x series of audio amplifiers from National Semiconductor. The series includes variants such as the LM4890 and LM4891, which share similar architectural features but may differ in pin configurations or specific performance metrics. These components are widely used in consumer electronics where space and power efficiency are critical design factors.

Audio Amplifiers Replacement Considerations

Compatible substitutes include the LM48901 and LM48901RL from Texas Instruments. Verify pin compatibility and electrical parameters before substitution. Other alternatives within the same family should be evaluated based on package size and thermal characteristics.