LM4890ITLX/NOPB

Series:	Boomer®
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Type:	Class AB
Output Type:	1-Channel (Mono)
Max Output Power x Channels @ Load:	1W x 1 @ 8 Ohm
Voltage - Supply:	2.2 V ~ 5.5 V
Features:	Depop, Shutdown, Thermal Protection
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Supplier Device Package:	9-uSMD
Package / Case:	9-WFBGA
Base Part Number:	LM4890

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Introduction Of LM4890ITLX/NOPB

The LM4890ITLX/NOPB is an audio amplifier from Texas Instruments, designed to amplify low-voltage audio signals. The amplifier is highly efficient with a low temper power level of 0.25 Watts on a 2.5V supply, providing 0.66 Watts on a 3V supply, and 1W on a 5V supply. It includes two independent amplifiers in a single chip, with separate gain control ports enabling each amplification channel to be set individually to any gain setting from 0dB to +20dB. The amplifier can be configured for either single-ended or differential output operation.

Application Field and Working Principle of LM4890ITLX/NOPB

The LM4890ITLX/NOPB is optimized for applications that include headphone amplifiers, active audio transducers, and portable audio signal boost applications. Its application field is mainly focused on amplifying low-voltage audio signals, such as headphone signals and portable audio amplifiers. The working principle of the LM4890ITLX/NOPB is to provide low-voltage amplification of audio signals. It uses P-Channel MOSFETs (PMOS) as the input stage and differential output stage. The amplifier\'s gain is set by controlling the current through the PMOS gates. As the voltage at the gate increases, the current increases, and as the voltage decreases, the current decreases. The PMOS is used as an active load and is capable of providing an adjustable gain control.The LM4890ITLX/NOPB audio amplifier provides excellent performance with excellent power efficiency. It features low current consumption, low distortion, and low electromagnetic interference (EMI). The amplifier is protected against over-temperature, over-current, and over-voltage conditions, making it highly reliable and suitable for a variety of applications.To provide high-quality, low-noise audio, the LM4890ITLX/NOPB includes a DC servo circuit that continuously monitors the output. This DC servo circuit adjusts the amplifier\'s DC bias, minimizing distortion and improving overall audio performance. The amplifier also features integrated short-circuit protection, thermal overload protection and EMI suppression.In conclusion, the LM4890ITLX/NOPB is an ideal choice for amplifying low-voltage audio signals. It is highly efficient and reliable, and provides excellent audio performance in a wide range of applications.

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