TPA4861DRG4

Audio Amplifiers Overview

The TPA4861DRG4 is a Texas Instruments mono audio power amplifier in an 8-pin SOIC surface-mount package. It delivers 1 W of continuous average power into an 8-ohm load at 0.2% THD+N from a 5-V supply. The device operates on 3.3-V and 5-V supplies with a voltage range of 2.7 V to 5.5 V. Key electrical characteristics include a shutdown current of 0.6 µA, a typical supply current of 2.5 mA at 3.3 V and 3.5 mA at 5 V, and a power supply rejection ratio of 56 dB at 1 kHz.

Audio Amplifiers Feature Summary

• Bridge-tied load (BTL) configuration eliminates the need for external output coupling capacitors.
• Shutdown control function reduces supply current to approximately 0.6 µA for power-sensitive applications.
• Uncompensated gain settings are supported from 2 to 20 in BTL mode.
• Integrated thermal and short-circuit protection ensures device reliability.

Audio Amplifiers Applications

• Voiceband frequency audio systems operating below 5 kHz
• Notebook computer sound channels
• Stereo applications when paired with the TPA4860

Audio Amplifiers Procurement Notes

Verify that the ordering suffix 'R' indicates tape-and-reel packaging as specified in the datasheet. Confirm the 'G4' suffix aligns with current manufacturing standards. Ensure the component matches the 8-SOIC physical dimensions and terminal functions listed in the official documentation before integration.

Audio Amplifiers Selection Notes

Select this component for single-channel audio applications requiring high efficiency without output capacitors. The BTL architecture doubles voltage swing compared to single-ended modes. Verify that the required gain setting falls within the uncompensated range of 2 to 20 to maintain stability without additional compensation components.

Audio Amplifiers Part Context

This part belongs to the TPA4861 family of linear audio power amplifiers. It is designed as a drop-in replacement for the LM4861. The device utilizes CMOS technology to provide high performance in a compact surface-mount package suitable for automated assembly processes.

Audio Amplifiers Replacement Considerations

The LM4861 is documented as a drop-in compatible substitute. Verify pinout compatibility and electrical specifications against the LM4861 datasheet to ensure seamless integration in existing designs.