LM3876 Datasheet | National Semiconductor

Description The LM3876 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 k Hz. The performance of the LM3876, utilizing its Self Peak Instantaneous Temperature (˚Ke) (SPi Ke™) Protection Circuitry, puts it in a class above discrete and hybrid amplifiers by providing an inherently, dynamically protected Safe Operating Area (SOA). SPi Ke Protection means that these parts are pletely safeguarded at the output against overvoltage, undervoltage, overloads, including shorts to the supplies, thermal runaway, and instantaneous temperature peaks. The LM3876 maintains an excellent Signal-to-Noise Ratio of greater than 95 d B(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 d B(min) An input mute function 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 protection, not allowing internal biasing to occur when |VEE| + |VCC| ≤ 12V, thus eliminating turn-on and turn-off transients n 11-lead TO-220 package n n n n n Applications n n n n n ponent stereo pact stereo Self-powered speakers Surround-sound amplifiers High-end stereo TVs Overture™ and SPi Ke™ Protection are trademarks of National Semiconductor Corporation. © 1999 National Semiconductor Corporation DS011832 .national. Typical Application DS011832-1 - Optional ponents dependent upon specific design requirements. Refer to the External ponents Description section for a ponent functional description . FIGURE 1. Typical Audio Amplifier Application Circuit Connection...