LM1875T/NOPB

Overview

The LM1875T/NOPB is a Class-AB single-channel audio power amplifier in a TO-220-5 package. It delivers 20W into an 8Ω load at ±25V and over 30W with ±30V. Key electrical parameters include a 60V maximum supply voltage, 5.5MHz gain-bandwidth product, 90dB open-loop gain, and 0.015% THD+N at 20W. The device features a 70kHz wide power bandwidth, 8V/μs slew rate, and operates within a 0°C to 70°C temperature range.

Feature Summary

• Integrated overload protection featuring internal current limiting and thermal shutdown circuitry.
• High-quality performance characterized by very low distortion levels even at high output power.
• Internal frequency compensation ensures stability for gains of 10 or greater.

Applications

• Consumer audio equipment
• Signal processing systems
• Speaker amplification

Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm compliance status and lead times. Ensure the procurement channel provides valid traceability for the component. Confirm that the TO-220-5 through-hole package matches the target PCB footprint requirements before finalizing orders.

Selection Notes

Select this component for designs requiring high-power monaural amplification with minimal external components. It is suitable for applications needing wide dynamic range and high current capability. Verify that the thermal management strategy accommodates the TO-220 package dissipation limits under maximum load conditions.

Part Context

This part belongs to the LM1875 series of audio power amplifiers manufactured by Texas Instruments. It is designed as a direct replacement for legacy National Semiconductor devices. The NOPB suffix indicates a lead-free and RoHS-compliant variant of the standard LM1875T.

Replacement Considerations

LM1875T/LF05 is a verified substitute offering identical specifications and pinout compatibility within the same series.