LM1875T/LF03

Overview

The LM1875T/LF03 is a monolithic Class-AB audio power amplifier manufactured by Texas Instruments. It delivers high-quality performance with very low distortion for consumer audio applications. The device provides 20 watts of output power to 4 or 8 ohm loads when powered by ±25V supplies, and can exceed 30 watts with an 8 ohm load and ±30V supply. It operates within a wide voltage range of 16V to 60V single supply or ±8V to ±30V dual supply. The component features internal current limiting and thermal shutdown protection.

Feature Summary

• Class-AB topology designed for low distortion and high fidelity audio reproduction
• Integrated overload protection including internal current limit and thermal shutdown
• Internal frequency compensation ensuring stability at gains of 10 or greater
• High slew rate and wide power bandwidth supporting dynamic audio signals

Applications

• Consumer audio amplifiers
• Speaker driver circuits
• Signal processing systems

Procurement Notes

Verify the specific suffix LF03 against the official datasheet to confirm package type and environmental compliance status. Ensure the ordering part number matches the required pin configuration and thermal characteristics. Cross-reference the manufacturer's latest documentation to confirm active status and availability before finalizing procurement decisions.

Selection Notes

Select this component for designs requiring robust audio amplification with minimal external components. It is suitable for applications needing high current capability and large output voltage swing. Consider the TO-220-5 package for through-hole mounting and adequate heat dissipation requirements in compact audio enclosures.

Part Context

This component belongs to the LM1875 series of audio power amplifiers from Texas Instruments. The series is characterized by its ability to deliver significant power output with low harmonic distortion. It utilizes advanced bipolar circuit technology to maintain performance under high output levels while providing comprehensive protection against operational faults.

Replacement Considerations

LM1875T/NOPB