National LM1875 User's Manual
Summary
The LM1875 is a high-performance monolithic audio power amplifier designed for demanding, professional sound applications. Delivering exceptional fidelity with very low distortion and up to 30W of clean output, it powers everything from stereo phonographs and bridge amplifiers to instrument systems. This comprehensive manual serves as the essential technical guide for engineers and designers, covering absolute maximum ratings, detailed electrical specifications (including THD and PSRR), stability analysis, and proper implementation guidelines needed to integrate this reliable component into advanced audio equipment.
Manual Details
| Brand | National |
|---|---|
| Pages | 11 |
| File Size | 491.80 KB |
| Published | June 02, 2026 |
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Frequently Asked Questions
What is the recommended input voltage range for reliable operation?
The amplifier supports a wide supply range, operating between 16V to 60V.
Does it have built-in protection against electrical faults?
Yes, it includes protection for AC and DC short circuits to ground, as well as thermal shutdown circuitry.
What is the typical low distortion performance of the LM1875?
At 1 kHz using an 8Ω load with 25V, the amplifier achieves a low distortion level of 0.015%.
Is this amplifier stable when driving multiple loads or high gains?
The device is designed to be internally compensated and stable for gains of 10 or greater.