LM4904ITL/NOPB

Audio Amplifiers Overview

The LM4904ITL/NOPB is a 1-watt audio power amplifier in an 8-bump DSBGA package. It operates from 2.0V to 5.5V and delivers 1.07W at 5V/8Ω (1% THD+N). Quiescent current is 3mA (no load) at 5V, dropping to 0.1µA in shutdown. PSRR is 62dB at 217Hz and 55dB at 1kHz. Output offset voltage is max 50mV. Wake-up time is 100ms max.

Audio Amplifiers Feature Summary

• Bridge-tied load configuration eliminates output coupling capacitors
• Ultra-low current shutdown mode for extended battery life
• Advanced circuitry minimizes audible noise during power transitions
• External resistors allow flexible closed-loop gain configuration

Audio Amplifiers Applications

• Mobile phones
• Personal digital assistants
• Portable electronic devices

Audio Amplifiers Procurement Notes

Verify the obsolete status of this component before procurement planning. Confirm that the DSBGA-8 footprint matches your PCB layout requirements. Ensure the design accommodates the specific thermal resistance characteristics of the microSMD wafer-level package. Validate that the supply voltage range aligns with system power rails.

Audio Amplifiers Selection Notes

Select this device for low-voltage mobile applications requiring high efficiency and minimal external components. The bridge-tied load architecture doubles output swing compared to single-ended designs. Verify that the required gain setting does not exceed unity-gain stability limits without additional bandwidth limiting components.

Audio Amplifiers Part Context

This component belongs to Texas Instruments' Boomer family of audio amplifiers. These devices are engineered for portable communication equipment where space and power consumption are critical constraints. The LM4904 specifically targets applications needing 1-watt output in the smallest possible form factor.

Audio Amplifiers Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.