LM4920TL/NOPB

Series:	Boomer®
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Type:	Class AB
Output Type:	Headphones, 2-Channel (Stereo)
Max Output Power x Channels @ Load:	80mW x 2 @ 16 Ohm
Voltage - Supply:	1.6 V ~ 4.2 V
Features:	Depop, Shutdown, Thermal Protection
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Supplier Device Package:	14-DSBGA
Package / Case:	14-WFBGA, DSBGA
Base Part Number:	LM4920

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LM4920TL/NOPB – Audio Amp Principles and Uses

Audio amplifier technology continues to evolve as demand from consumer electronics grows. Modern solutions include low power solutions like the LM4920TL/NOPB audio amplifier. In this article, we\'ll discuss the LM4920TL/NOPB audio amplifier along with its application fields and how it works.

Overview - What is LM4920TL/NOPB?

The LM4920TL/NOPB is an audio amplifier IC (Integrated Circuit) manufactured by Texas Instruments. It\'s a powerful, low power audio amplifier that can be used in various consumer and professional audio applications, such as car audio, portable audio and professional audio systems. The LM4920TL/NOPB is a fully tested and qualified integrated circuit (IC) chip, ensuring minimal external component count. This IC operates over a wide voltage range of 1.8V to 5V, making it ideal for battery-operated systems as well as sophisticated, high-end audio systems. The LM4920TL/NOPB audio amplifier presents an efficient single-end design that allows for low quiescent current (Iq) for low-voltage supply of 1.8V.

Working Principle of the LM4920TL/NOPB Audio Amplifier

The LM4920TL/NOPB audio amplifier chip has an inverting amplifier architecture that produces a positive output from an incoming negative signal and vice-versa. It effectively amplifies small-signal voltage and current to produce a higher output without significant losses in the signal-to-noise ratio. The main components of the audio amplifier are its transistors, resistors, and capacitors. These components are arranged in such a way that they form an integrated circuit. The transistors act as amplifying and switching components. The resistors and capacitors form an impedance network for filtering out undesired frequencies.

Application Fields of the LM4920TL/NOPB Audio Amplifier

The LM4920TL is a great choice for applications when single-supply and ultra-low power are needed. It has the ability to drive loads up to 400mA with up to 24dB of power gain. This makes it ideal for a wide variety of portable and stationary audio applications, such as car audio systems, portable audio players and professional audio systems. Due to its low Iq, it allows a higher peak output currents compared to other amplifiers using a bipolar supply voltage. This allows the amplifier to be powered by a single cell without sacrificing performance. It is also ideal for wireless, medical and avionics applications, as it is able to operate in the 50 to 200kHz frequency range with a low Iq down to 1.7mA.

Benefits of the LM4920TL/NOPB Audio Amplifier

The LM4920TL/NOPB audio amplifier chip is a powerful, low power solution that offers many advantages over traditional linear amplifiers. Its advantages include low distortion, low quiescent current, wide voltage range, high output current capability and low noise. This audio amplifier chip is also designed with a thermal overload protection circuit to protect the device when temperature rises above the recommended threshold. The LM4920TL/NOPB audio amplifier is a great option for audio systems that require a low power, efficient solution. This IC is able to provide a clean audio signal without significant losses in the signal-to-noise ratio, while offering low Iq. This device is a great choice for any portable or stationary audio application.

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