LM4780 Datasheet, PDF (1/31 Pages) National Semiconductor (TI) – Audio Power Amplifier Series Stereo 60W, Mono 120W Audio Power Amplifier with Mute

LM4780, LM4780TABD
www.ti.com
SNAS193B – JULY 2003 – REVISED APRIL 2013
LM4780 Overture™ Audio Power Amplifier Series Stereo 60W, Mono 120W Audio Power
Amplifier with Mute
Check for Samples: LM4780, LM4780TABD
FEATURES
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•23 SPiKe Protection
• Low External Component Count
• Quiet Fade-In/Out Mute Mode
• Wide Supply Range: 20V - 84V
• Signal-to-Noise Ratio ≥ 97dB (ref. to P_O = 1W)
APPLICATIONS
• Audio Amplifier for Component Stereo
• Audio Amplifier for Compact Stereo
• Audio Amplifier for Self-Powered Speakers
• Audio Amplifier for High-End and HD TVs
KEY SPECIFICATIONS
• Output Power/Channel with 0.5% THD+N, 1kHz
into 8Ω: 60 W (Typ)
• THD+N at 2 x 30W into 8Ω (20Hz - 20kHz):
0.03% (Typ)
• THD+N at 2 x 30W into 6Ω (20Hz - 20kHz):
0.05% (Typ)
• THD+N at 2 x 30W into 4Ω (20Hz - 20kHz):
0.07% (Typ)
• Mute Attenuation: 110 dB (Typ)
• PSRR: 85 dB (Min)
• Slew Rate: 19V/µs (Typ)
DESCRIPTION
The LM4780 is a stereo audio amplifier capable of
typically delivering 60W per channel of continuous
average output power into an 8Ω load with less than
0.5% THD+N from 20Hz - 20kHz.
The LM4780 is fully protected utilizing Texas
Instruments' Self Peak Instantaneous Temperature
(°Ke) (SPiKe^TM) protection circuitry. SPiKe provides a
dynamically optimized Safe Operating Area (SOA).
SPiKe protection completely safeguards the
LM4780's outputs against over-voltage, under-
voltage, overloads, 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.
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Overture is a trademark of Texas Instruments.
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All other trademarks are the property of their respective owners.
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2003–2013, Texas Instruments Incorporated