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LM4734 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM4734 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 24 page  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 4 Ω 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 4 Ω or 8Ω 20W (typ) j THD+N at 3x1W into 8 Ω, 1kHz 0.03% (typ) j Mute Attenuation 110dB (typ) j PSRR 64dB (typ) j Slew Rate 18V/µs (typ) Features n Low external component count n Quiet fade-in/out mute mode n Low power standby mode n Wide supply range: 20V - 60V Applications n Audio amplifier for component stereo n Audio amplifier for compact stereo n Audio amplifier for home theater in a box (HTB) n Audio amplifier for high-end and HD TVs Typical Application SPiKe™ Protection and Overture™ are trademarks of National Semiconductor Corporation. 200898D2 FIGURE 1. Typical Audio Amplifier Application Circuit February 2004 © 2004 National Semiconductor Corporation DS200898 www.national.com |
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