LM49352RL/NOPB

Series:	Boomer®, PowerWise®
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Type:	Class D
Output Type:	1-Channel (Mono) with Mono and Stereo Headphones
Max Output Power x Channels @ Load:	1.4W x 1 @ 8 Ohm; 65mW x 2 @ 32 Ohm
Voltage - Supply:	--
Features:	Depop, Differential Inputs, I²C, I²S, Microphone, Shutdown, Volume Control
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Supplier Device Package:	36-DSBGA (3.5x3.24)
Package / Case:	36-WFBGA, DSBGA
Base Part Number:	LM49352

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LM49352RL/NOPB Application Field and Working PrincipleAudio amplifiers have been an essential part of many electronic products utilized in various industries. They are used to enhance audio signals for a range of applications, such as music output in car audio systems, sound enhancement in home theaters, noise cancellation for smartphones, and audio streaming in internet of things (IoT) devices. The Texas Instruments LM49352RL/NOPB amplifier is a high-performance audio amplifier used in many of these applications. This device features a very low noise floor and delivers high-fidelity sound reproduction. It is also capable of driving two-channel speakers for stereo audio applications. The LM49352RL/NOPB also has a low power consumption of just 5mW, making it ideal for battery-powered audio devices.This article will provide an overview of the LM49352RL/NOPB, its application fields, and its working principle.Application FieldsThe LM49352RL/NOPB is suitable for a wide range of applications. It can be used to drive headphones in portable MP3 players, car audio systems, and home theaters. It is also suitable for sound processing and noise cancellation in mobile phones, tablets, and other portable devices. Additionally, it is used in automotive LCD displays, active speakers, and wireless headsets.The LM49352RL/NOPB can operate from a wide range of supply voltages, from 2.7V to 5.5V. This makes it ideal for many low-voltage applications, such as miniature audio devices powered by batteries. The LM49352RL/NOPB can provide high-fidelity audio with low distortion. It is capable of driving loads up to 32Ω, and it has a high power efficiency of over 70%. It can easily drive two channels of 8Ω speakers, and it features a low noise floor of -82dB at 5mW of output power. This makes it perfect for applications requiring high-fidelity sound reproduction. Working PrincipleThe LM49352RL/NOPB is a differential amplifier. It consists of two amplifying stages, the output stage and the input stage. The input stage amplifies the input signal, while the output stage drives the speaker load. The LM49352RL/NOPB features a flexible input topology that allows for the input signal to be easily configured. The device has two selectable input locations (which can be either single-ended or differential inputs), so the user can choose the optimal topology for the application. Additionally, the device also has a selectable gain of 0dB or 6dB, allowing the user to adjust the output level as needed. The LM49352RL/NOPB also has a ground shunting feature, which provides a low-noise ground connection and reduces ground noise. This is especially important in applications where the ground level represents the ground reference for the audio signals.ConclusionThe LM49352RL/NOPB is a high-performance audio amplifier with a low noise floor and high power efficiency. It is suitable for a wide range of applications, including headphones, car audio systems, and home theaters. The device also features a flexible input topology and a low power consumption of just 5mW, making it ideal for battery-powered audio devices. Additionally, the LM49352RL/NOPB has a ground shunting feature to reduce ground noise in sensitive audio applications.

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