Datasheet
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
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FEATURES
DESCRIPTION
The LM4780 is a stereo audio amplifier capable of
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• SPiKe Protection
typically delivering 60W per channel of continuous
• Low External Component Count
average output power into an 8Ω load with less than
• Quiet Fade-In/Out Mute Mode
0.5% THD+N from 20Hz - 20kHz.
• Wide Supply Range: 20V - 84V
The LM4780 is fully protected utilizing Texas
• Signal-to-Noise Ratio ≥ 97dB (ref. to P
O
= 1W)
Instruments' Self Peak Instantaneous Temperature
(°Ke) (SPiKe
TM
) protection circuitry. SPiKe provides a
dynamically optimized Safe Operating Area (SOA).
APPLICATIONS
SPiKe protection completely safeguards the
• Audio Amplifier for Component Stereo
LM4780's outputs against over-voltage, under-
• Audio Amplifier for Compact Stereo
voltage, overloads, shorts to the supplies or GND,
thermal runaway and instantaneous temperature
• Audio Amplifier for Self-Powered Speakers
peaks. The advanced protection features of the
• Audio Amplifier for High-End and HD TVs
LM4780 places it in a class above discrete and hybrid
amplifiers.
KEY SPECIFICATIONS
Each amplifier of the LM4780 has an independent
• Output Power/Channel with 0.5% THD+N, 1kHz
smooth transition fade-in/out mute.
into 8Ω: 60 W (Typ)
The LM4780 can easily be configured for bridge or
• THD+N at 2 x 30W into 8Ω (20Hz - 20kHz):
parallel operation for 120W mono solutions.
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)
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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.
2Overture is a trademark of Texas Instruments.
3All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2003–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.