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LM4734

National Semiconductor
Part Number LM4734
Manufacturer National Semiconductor
Description 3 Channel 20W Audio Power Amplifier
Published Oct 18, 2006
Detailed Description www.DataSheet4U.com LM4734 3 Channel 20W Audio Power Amplifier with Mute and Standby February 2004 LM4734 3 Channel 2...
Datasheet PDF File LM4734 PDF File

LM4734
LM4734


Overview
www.
DataSheet4U.
com LM4734 3 Channel 20W Audio Power Amplifier with Mute and Standby February 2004 LM4734 3 Channel 20W Audio Power Amplifier with Mute and Standby General 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.
Key Specifications j Output Power/Channel with 10% THD+N, 1kHz into 4Ω or 8Ω j THD+N at 3x1W into 8Ω, 1kHz j Mute Attenuation j PSRR j Slew Rate 20W (typ) 0.
03% (typ) 110dB (typ) 64dB (typ) 18V/µs (typ) Features n n n n Low external component count Quiet fade-in/out mute mode Low power standby mode Wide supply range: 20V - 60V Applications n n n n Audio Audio Audio Audio amplifier amplifier amplifier amplifier for for for for component stereo compact stereo home theater in a box (HTB) high-end and HD TVs Typical Application 200898D2 FIGURE 1.
Typical Audio Amplifier Application Circuit SPiKe™ Protection and Overture™ are trademarks of National Semiconductor Corporation.
© 2004 National Semiconductor Corporation DS200898 www.
national.
com DataSheet 4 U .
com www.
DataSheet4U.
com LM4734 Connection Diagrams Plastic Package (Note 13) 200898I4 Top View Order Number LM4734TA See NS Package Number TA27A TO-220 Top Marking 200898I5 Top View U - ...


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