LM4854MTX/NOPB

Series:	Boomer®
Packaging:	Tape & Reel (TR)
Part Status:	Discontinued at Digi-Key
Type:	Class AB
Output Type:	1-Channel (Mono) with Stereo Headphones
Max Output Power x Channels @ Load:	2.3W x 1 @ 3.2 Ohm; 200mW x 2 @ 16 Ohm
Voltage - Supply:	2.4 V ~ 5.5 V
Features:	Depop, Shutdown, Standby, Thermal Protection
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Supplier Device Package:	14-TSSOP
Package / Case:	14-TSSOP (0.173", 4.40mm Width)
Base Part Number:	LM4854

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Application Field and Working Principle of LM4854MTX/NOPB

The LM4854MTX/NOPB, made by Texas Instruments, is a stereo audio amplifier designed to integrate two data sources. It has two channels, a volume control and can deliver up to 10W of power per channel into 8 ohm loads.In terms of application fields, the LM4854MTX/NOPB is ideal for consumer audio products such as MP3 Players and portable speaker systems, as well as industrial and automotive applications. Additionally, it has been designed to meet the needs of systems operating from single or dual supply rails.When it comes to the working principle of the LM4854MTX/NOPB, ithas a class AB architecture coupled with a simple, yet very efficient, layout. The amplifier features low quiescent power consumption and high power capability for extended dynamic range. It also offers superior active-mode efficiency, which reduces power consumption.The amplifier’s high voltage gain, low output impedance and high operating voltage allows the LM4854MTX/NOPB to drive difficult loads with ease. The power output stages feature the patented Class-AB technique for enhanced efficiency, with an adjustable quiescent current for compatibility with various audio DSP and processor ICs.As far as the other features, the LM4854MTX/NOPB has an integrated shutdown mode which, when activated, will reduce current draw to just 6µA, ideally suited for battery operated systems. It also has an advanced thermal protection circuit which will reduce power output to safe levels upon detecting a thermal over-stress condition.The LM4854MTX/NOPB amplifiers also offer a few selectable operating modes designed to support various audio systems. This includes, stereo, dual mono and bridge-tied load configurations.To further enhance the flexibility of the LM4854MTX/NOPB, the integrated volume control offers 64 different settings, allowing users to adjust the sound level of the amplifier to their desired setting. Additionally, a differential audio input stage can be utilized to reduce the effects of ground noise on the audio system.Finally, the LM4854MTX/NOPB provides excellent stability and EMI performance, thereby reducing the need for shielding or sensitive external components. This makes it a great choice for audio systems operating at the lowest cost, requiring minimal power and providing the highest involved quality performance.In conclusion, the LM4854MTX/NOPB stereo audio amplifier is a great choice for consumer audio products such as MP3 players and portable speaker systems, as well as industrial and automotive applications, thanks to its efficient class AB architecture, low power consumption, high power capability and differential audio input stage. The amplifier offers a range of different operating modes, adjustable volume control and excellent stability and EMI performance, allowing it to provide the highest quality performance at the lowest cost possible.

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