LM4734_14 Datasheet, PDF (1/28 Pages) Texas Instruments – 3 Channel 20W Audio Power Amplifier with Mute and Standby

LM4734, LM4734TABD
www.ti.com
SNAS239A – MAY 2004 – REVISED MARCH 2006
LM4734 3 Channel 20W Audio Power Amplifier with Mute and Standby
Check for Samples: LM4734, LM4734TABD
FEATURES
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•2 Low External Component Count
• Quiet Fade-In/Out Mute Mode
• Low Power Standby Mode
• Wide Supply Range: 20V - 60V
APPLICATIONS
• Audio Amplifier for Component Stereo
• Audio Amplifier for Compact Stereo
• Audio Amplifier for Home Theater in a Box
(HTB)
• Audio Amplifier for High-End and HD TVs
KEY SPECIFICATIONS
• Output Power/Channel with 10% THD+N, 1kHz
into 4Ω or 8Ω: 20W (typ)
• THD+N at 3x1W into 8Ω, 1kHz: 0.03% (typ)
• Mute Attenuation: 110dB (typ)
• PSRR: 64dB (typ)
• Slew Rate: 18V/μs (typ)
DESCRIPTION
The LM4734 is a three channel audio amplifier
capable of typically delivering 20W per channel of
continuous average output power into a 4Ω or 8Ω
load with less than 10% THD+N from 20Hz - 20kHz.
The LM4734 has short circuit protection and a
thermal shut down feature that is activated when the
die temperature exceeds 150°C. The LM4734 also
has an under voltage lock out feature for click and
pop free power on and off.
Each amplifier of the LM4734 has an independent
smooth transition fade-in/out mute and a power
conserving standby mode. The mute and standby
modes can be controlled by external logic.
The LM4734 has a wide supply operating supply
range from ±10V - ±30V allowing for lower cost
unregulated power supplies to be used.
The LM4734 can easily be configured for bridge or
parallel operation for higher power and bi-amp
solutions.
Typical Application
Figure 1. Typical Audio Amplifier Application Circuit
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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.
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