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LM4780 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM4780 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 24 page LM4780 Overture™ Audio Power Amplifier Series Stereo 60W, Mono 120W Audio Power Amplifier with Mute General Description The LM4780 is a stereo audio amplifier capable of typically delivering 60W per channel of continuous average output power into an 8 Ω load with less than 0.5% THD+N from 20Hz - 20kHz. The LM4780 is fully protected utilizing National’s Self Peak Instantaneous Temperature (˚Ke) (SPiKe TM) protection cir- cuitry. SPiKe provides a dynamically optimized Safe Operat- ing Area (SOA). SPiKe protection completely safeguards the LM4780’s outputs against over-voltage, under-voltage, over- loads, shorts to the supplies or GND, thermal runaway and instantaneous temperature peaks. The advanced protection features of the LM4780 places it in a class above discrete and hybrid amplifiers. Each amplifier of the LM4780 has an independent smooth transition fade-in/out mute. The LM4780 can easily be configured for bridge or parallel operation for 120W mono solutions. Key Specifications n Output Power/Channel with 0.5% THD+N, 1kHz into 8 Ω 60W (typ) n THD+N at 2 x 30W into 8 Ω (20Hz - 20kHz) 0.03% (typ) n THD+N at 2 x 30W into 6 Ω (20Hz - 20kHz) 0.05% (typ) n THD+N at 2 x 30W into 4 Ω (20Hz - 20kHz) 0.07% (typ) n Mute Attenuation 110dB (typ) n PSRR 85dB (min) n Slew Rate 19V/µs (typ) Features n SPiKe Protection n Low external component count n Quiet fade-in/out mute mode n Wide supply range: 20V - 84V n Signal-to-Noise Ratio ≥ 97dB (ref. to P O = 1W) Applications n Audio amplifier for component stereo n Audio amplifier for compact stereo n Audio amplifier for self-powered speakers n Audio amplifier for high-end and HD TVs Typical Application SPiKe™ Protection and Overture™ are trademarks of National Semiconductor Corporation. 20058622 FIGURE 1. Typical Audio Amplifier Application Circuit July 2003 © 2003 National Semiconductor Corporation DS200586 www.national.com |
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