LM3875

LM3875 Overture Audio Power Amplifier Series High-Performance 56W Audio Power Amplifier June 1999 LM3875 Overture™ Audio Power Amplifier Series High-Performance 56W Audio Power Amplifier General Description The LM3875 is a high-performance audio power amplifier capable of delivering 56W of continuous average power to an 8Ω load with 0.1% (THD + N) from 20 Hz–20 kHz. The performance of the LM3875, utilizing its Self Peak Instantaneous Temperature (˚Ke) (SPiKe™) Protection Circuitry, puts it in a class above discrete and hybrid amplifiers by providing an inherently, dynamically protected Safe Operating Area (SOA). SPiKe Protection means that these parts are completely safeguarded at the output against overvoltage, undervoltage, overloads, including shorts to the supplies, thermal runaway, and instantaneous temperature peaks. The LM3875 maintains an excellent Signal-to-Noise Ratio of greater than 95 dB(min) with a typical low noise floor of 2.0 µV. It exhibits extremely low (THD + N) values of 0.06% at the rated output into the rated load over the audio spectrum, and provides excellent linearity with an IMD (SMPTE) typical rating of 0.004%. Features 56W continuous average output power into 8Ω 100W instantaneous peak output power capability Signal-to-Noise Ratio > 95 dB (min) Output protection from a short to ground or to the supplies via internal current limiting circuitry n Output over-voltage protection against transients from inductive loads n Supply under-voltage protecti...