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LM3886 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM3886 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 20 page LM3886 Overture™ Audio Power Amplifier Series High-Performance 68W Audio Power Amplifier w/Mute General Description The LM3886 is a high-performance audio power amplifier capable of delivering 68W of continuous average power to a 4 Ω load and 38W into 8Ω with 0.1% (THD + N) from 20 Hz–20 kHz. The performance of the LM3886, utilizing its Self Peak In- stantaneous Temperature (˚Ke) (SPiKe™) Protection Cir- cuitry, puts it in a class above discrete and hybrid amplifiers by providing an inherently, dynamically protected Safe Oper- ating Area (SOA). SPiKe Protection means that these parts are completely safeguarded at the output against overvolt- age, undervoltage, overloads, including shorts to the sup- plies, thermal runaway, and instantaneous temperature peaks. The LM3886 maintains an excellent Signal-to-Noise Ratio of greater than 92 dB with a typical low noise floor of 2.0 µV. It exhibits extremely low (THD + N) values of 0.03% at the rated output into the rated load over the audio spectrum, and provides excellent linearity with an IMD (SMPTE) typical rat- ing of 0.004%. Features n 68W cont. avg. output power into 4 Ω at V CC = ±28V n 38W cont. avg. output power into 8 Ω at V CC = ±28V n 50W cont. avg. output power into 8 Ω at V CC = ±35V n 135W instantaneous peak output power capability n Signal-to-Noise Ratio ≥ 92 dB n An input mute function n 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 |V EE|+|VCC| ≤ 12V, thus eliminating turn-on and turn-off transients n 11-lead TO-220 package Applications n Component stereo n Compact stereo n Self-powered speakers n Surround-sound amplifiers n High-end stereo TVs Typical Application Overture™ and SPiKe ™ Protection are trademarks of National Semiconductor Corporation. DS011833-1 *Optional components dependent upon specific design requirements. Refer to the External Components Description section for a component functional description. FIGURE 1. Typical Audio Amplifier Application Circuit May 1999 © 1999 National Semiconductor Corporation DS011833 www.national.com |
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