LM3876TF/NOPB

Audio Amplifiers Overview

The LM3876TF/NOPB is a high-performance audio power amplifier delivering 56W continuous average output power into an 8Ω load with 0.1% THD+N from 20Hz to 20kHz. It features 100W instantaneous peak output capability and a signal-to-noise ratio of at least 95dB (min). The device includes an input mute function, SPiKe protection against overvoltage, undervoltage, and thermal runaway, and supply under-voltage protection that prevents transients during turn-on/off. It operates within a wide supply range of 24V to 84V total voltage.

Audio Amplifiers Feature Summary

• Integrates Self-Protected Safe Operating Area (SPiKe) circuitry for dynamic protection against overloads and temperature peaks.
• Includes an input mute function allowing control via current draw from the mute pin.
• Features supply under-voltage protection to eliminate turn-on and turn-off transients.
• Provides output protection from short circuits to ground or supplies via internal current limiting.

Audio Amplifiers Applications

• Component stereo systems
• Compact stereo setups
• Self-powered speakers
• Surround-sound amplifiers
• High-end stereo TVs

Audio Amplifiers Procurement Notes

Verify the specific ordering suffix matches the required package type and environmental compliance. Confirm the datasheet revision aligns with design requirements. Ensure proper heat sinking is planned as the device dissipates significant power. Check for availability of compatible evaluation boards if needed. Validate pin compatibility with existing PCB layouts before finalizing procurement.

Audio Amplifiers Selection Notes

Select this component for applications requiring high power output with robust built-in protection. Consider the 11-lead TO-220 package for thermal management needs. Evaluate the wide supply voltage range suitability for the system's power architecture. Assess the need for external mute switching capabilities. Verify thermal resistance calculations match the intended enclosure environment.

Audio Amplifiers Part Context

This part belongs to the Overture Audio Power Amplifier Series by Texas Instruments. It is designed for high-fidelity audio reproduction in consumer electronics. The series emphasizes reliability through integrated protection mechanisms. It serves as a direct replacement for discrete amplifier designs in many high-power applications.

Audio Amplifiers Replacement Considerations

The LM3886 is a related device in the same series offering higher power ratings. Verify pin compatibility when substituting between LM3876 and LM3886 variants. Ensure thermal requirements are met for any higher-power alternative.

Audio Amplifiers FAQ

How does the mute function operate?

The mute function is activated by drawing less than 0.5 mA out of pin 8. This can be controlled using a switch and resistor network connected to the negative supply.

What is the purpose of SPiKe protection?

SPiKe (Safe Area Peak Instantaneous Temperature) protection safeguards the output transistors against instantaneous temperature peaks, overvoltage, undervoltage, and thermal runaway.