LME49811TB/NOPB

Audio Amplifiers Overview

The LME49811 is a high-fidelity audio power amplifier input stage designed for demanding consumer and pro-audio applications. It supports wide operating voltage ranges from ±20V to ±100V, enabling scalable output power exceeding 500 watts single-ended into an 8-ohm load. Key electrical specifications include a typical THD+N of 0.00035% at 1kHz with ±100V supplies, a DC PSRR of 115dB, and a minimum slew rate of 14 V/μs. The device features external compensation capabilities and integrated thermal shutdown protection.

Audio Amplifiers Feature Summary

• Integrated thermal shutdown circuitry activates when die temperature exceeds 150°C to prevent damage.
• Shutdown function allows control via current injection into the dedicated pin.
• Supports external compensation for stability optimization across varying supply voltages.

Audio Amplifiers Applications

• Powered Subwoofers
• Pro Audio Systems
• Powered Studio Monitors
• Audio Video Receivers
• Guitar Amplifiers

Audio Amplifiers Procurement Notes

Verify component authenticity through authorized Texas Instruments distributors or certified partners. Confirm datasheet revision C (April 2013) alignment during integration. Ensure proper ESD handling protocols are followed due to limited built-in protection on MOS gates. Validate thermal management requirements against system ambient temperatures to avoid unintended activation of internal thermal limits.

Audio Amplifiers Selection Notes

Select this component for designs requiring high-voltage operation up to ±100V and low distortion performance. Consider the need for external biasing networks and heat sinks to manage power dissipation effectively. Evaluate PCB layout strategies to minimize ground loops and ensure adequate bypassing near package terminals for optimal stability.

Audio Amplifiers Part Context

This part belongs to the LME49810 series of high-fidelity audio power amplifiers. While sharing similar architectural goals, the LME49811 specifically includes a shutdown control feature not present in all family variants. It serves as the input driver stage for discrete output transistor configurations in high-power audio systems.

Audio Amplifiers Replacement Considerations

LME49810TB/NOPB lacks the shutdown functionality found in the LME49811. Verify if the specific application requires the active shutdown control before substituting.