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LM4780 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LM4780
Description  Audio Power Amplifier Series Stereo 60W, Mono 120W Audio Power Amplifier with Mute
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM4780 Datasheet(HTML) 1 Page - National Semiconductor (TI)

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LM4780 OvertureAudio 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
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
SPiKeProtection and Overtureare 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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