LM4844TLX

更新时间： 2024-11-09 13:09:23

品牌	Logo	应用领域
美国国家半导体 - NSC		/
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21页	980K
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LM4844TLX 数据手册

June 2005

LM4844

Stereo 1.2W Audio Sub-system with 3D Enhancement

General Description

Key Specifications

The LM4844 is an integrated audio sub-system designed for

stereo cell phone applications. Operating on a 3.3V supply, it

combines a stereo speaker amplifier delivering 495mW per

channel into an 8Ω load and a stereo OCL headphone

amplifier delivering 33mW per channel into a 32Ω load.

It integrates the audio amplifiers, volume control, mixer,

power management control, and National 3D enhancement

all into a single package. In addition, the LM4844 routes and

mixes the stereo and mono inputs into 10 distinct output

modes. The LM4844 is controlled through an I²C compatible

interface.

P_OUT, Stereo BTL, 8Ω, 3.3V,

1% THD+N

495mW (typ)

P_OUTHP, 32Ω, 3.3V,

1% THD+N

33mW (typ)

0.1µA (typ)

Shutdown Current, 3.3V

Features

n Stereo speaker amplifier

n Stereo OCL headphone amplifier

Boomer audio power amplifiers are designed specifically to

provide high quality output power with a minimal amount of

external components.

n Independent Left, Right, and Mono volume controls

n National 3D enhancement

n I²C compatible interface

The LM4844 is available in a very small 2.5mm x 2.9mm

30-bump micro SMD (TL) package.

n Ultra low shutdown current

n Click and Pop Suppression circuit

n 10 distinct output modes

Applications

n Cell Phones

n PDAs

n Portable Gaming Devices

n Internet Appliances

n Portable DVD, CD, AAC, and MP3 Players

Block Diagram

20153531

FIGURE 1. Audio Sub-system Block Diagram

Boomer^®is a registered trademark of National Semiconductor Corporation.

DS201535

www.national.com

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与LM4844TLX相关器件

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LM4844TLX/NOPB	TI	获取价格	VOLUME CONTROL CIRCUIT
LM4845	NSC	获取价格	Output Capacitor-less Audio Subsystem with Programmable National 3D
LM4845ITL	NSC	获取价格	Output Capacitor-less Audio Subsystem with Programmable National 3D
LM4845ITLX	NSC	获取价格	IC 0.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA25, MICRO, SMD-25, Audio/Video Amplifier
LM4846	NSC	获取价格	Output Capacitor-less Audio Subsystem with Programmable National 3D
LM4846TL	NSC	获取价格	Output Capacitor-less Audio Subsystem with Programmable National 3D
LM4846TLX	NSC	获取价格	IC 0.5 W, 3 CHANNEL, AUDIO AMPLIFIER, BGA25, MICRO, BGA-25, Audio/Video Amplifier
LM4849	NSC	获取价格	Stereo 2W Audio Power Amplifiers with DC Volume Control and Input Mux
LM4849MH	NSC	获取价格	Stereo 2W Audio Power Amplifiers with DC Volume Control and Input Mux
LM4849MHX/NOPB	TI	获取价格	IC,AUDIO AMPLIFIER,SINGLE,TSSOP,28PIN,PLASTIC