LM4872ITP/NOPB

Audio Amplifiers Overview

The LM4872ITP/NOPB is a bridge-connected audio power amplifier in an 8-bump micro SMD package. It delivers 1W of continuous average power to an 8Ω load with less than 0.2% THD from a 5V supply. Operating voltage ranges from 2.0V to 5.5V. Quiescent current is typically 5.3mA at 5V and 4mA at 3.3V. Shutdown current is typically 0.01µA. The device features external gain configuration, thermal shutdown protection, and requires no output coupling capacitors.

Audio Amplifiers Feature Summary

• Bridge-connected architecture eliminates the need for output coupling capacitors
• Externally controlled low-power consumption shutdown mode
• Internal thermal shutdown protection mechanism
• Unity-gain stable with configurable closed-loop gain

Audio Amplifiers Applications

• Cellular Phones
• Portable Computers
• Low Voltage Audio Systems

Audio Amplifiers Procurement Notes

Verify the specific suffix ITP against official documentation to confirm pinout and package variations. Confirm RoHS compliance status through manufacturer datasheets. Ensure design compatibility with the 8-bump micro SMD footprint. Validate electrical parameters against the latest Texas Instruments specifications before integration.

Audio Amplifiers Selection Notes

Select this component for portable applications requiring high efficiency without external output capacitors. Consider the 8-bump micro SMD package for space-constrained designs. Evaluate thermal dissipation requirements based on the specified junction temperature limits. Ensure supply voltage remains within the 2.0V to 5.5V operating range for optimal performance.

Audio Amplifiers Part Context

The LM4872 belongs to the Boomer family of audio power amplifiers designed by National Semiconductor, now part of Texas Instruments. These amplifiers are engineered to provide high-quality output power with minimal external components. The micro SMD packaging supports low-power portable electronics where size and efficiency are critical constraints.

Audio Amplifiers Replacement Considerations

LM4872IBP

Audio Amplifiers FAQ

How is the shutdown function activated?

The shutdown feature turns the amplifier off when a logic high is placed on the shutdown pin. Triggering between logic levels is typically half-supply.

What is the maximum junction temperature?

The maximum junction temperature (TJMAX) is 150°C. Power dissipation must be derated at elevated temperatures to ensure this limit is not exceeded.