Datasheet > LM4842MH

LM4842MH

更新时间： 2024-11-08 22:51:51

品牌	Logo	应用领域
美国国家半导体 - NSC		驱动器放大器
页数	文件大小	规格书
31页	1300K
描述
Stereo 2W Amplifiers with DC Volume Control Transient Free Outputs, and Cap-less Headphone Drive

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LM4842MH 数据手册

September 2002

LM4842

Stereo 2W Amplifiers with DC Volume Control,

Transient Free Outputs, and Cap-less Headphone Drive

General Description

Key Specifications

n P_Oat 1% THD+N

The LM4842 is a monolithic integrated circuit that provides

DC volume control, and stereo bridged audio power amplifi-

ers capable of producing 2W into 4Ω (Note 1) or 2.2W into

3Ω (Note 2) with less than 1.0% THD+N.

into 3Ω (MH and LQ)

into 4Ω (MH and LQ)

into 8Ω (MT, MH, and LQ)

2.2W(typ)

2.0W(typ)

1.1W(typ)

1.0%(typ)

0.2µA(typ)

Boomer^®audio integrated circuits were designed specifically

to provide high quality audio while requiring a minimum

amount of external components. The LM4842 incorporates a

DC volume control, stereo bridged audio power amplifiers,

new cap-less headphone driver circuit (patent pending), se-

lectable gain or bass boost, and an input mux making it

optimally suited for multimedia monitors, portable radios,

desktop, and portable computer applications.

n Single-ended THD+N at 85mW into 32Ω

n Shutdown current (Shutdown Low)

Features

n Stereo headphone amplifier mode that eliminates the

Output Coupling Capacitors (patent pending)

n Advanced “click and pop” suppression circuitry

n Acoustically Enhanced DC Volume Control Taper

n 2 Channel Stereo Input MUX

The LM4842 features an externally controlled, low-power

consumption shutdown mode (Shutdown Low), and both a

power amplifier and headphone mute for maximum system

flexibility and performance.

Note 1: When properly mounted to the circuit board, the LM4842MH will

deliver 2W into 4Ω. The LM4842MT will deliver 1.1W into 8Ω. See the

Application Information section for LM4842MH usage information.

n System Beep Detect

n Stereo switchable bridged/single-ended power amplifiers

n Selectable internal/external gain and bass boost

n Thermal shutdown protection circuitry

Note 2: An LM4842MH that has been properly mounted to the circuit board

and forced-air cooled will deliver 2.2W into 3Ω.

Applications

n Portable and Desktop Computers

n Multimedia Monitors

n Portable Radios, PDAs, and Portable TVs

Connection Diagrams

TSSOP Package

20028102

Top View

Order Number LM4842MT

See NS Package Number MTC28 for TSSOP

Order Number LM4842MH

See NS Package Number MXA28A for Exposed-DAP TSSOP

Boomer^®is a registered trademark of NationalSemiconductor Corporation.

DS200281

www.national.com

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与LM4842MH相关器件

型号	品牌	获取价格	描述	数据表
LM4842MH/NOPB	TI	获取价格	2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28, TSSOP-28
LM4842MT	NSC	获取价格	Stereo 2W Amplifiers with DC Volume Control Transient Free Outputs, and Cap-less Headphone
LM4842MT/NOPB	TI	获取价格	2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28, TSSOP-28
LM4842MTX	TI	获取价格	2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28, TSSOP-28
LM4843	NSC	获取价格	Stereo 2W Audio Power Amplifiers with DC Volume Control
LM4843MH	NSC	获取价格	Stereo 2W Audio Power Amplifiers with DC Volume Control
LM4843MHX	TI	获取价格	IC 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO20, TSSOP-20, Audio Control IC
LM4844	NSC	获取价格	Stereo 1.2W Audio Sub-system with 3D Enhancement
LM4844_07	NSC	获取价格	Stereo 1.2W Audio Sub-System with 3D Enhancement
LM4844TL	NSC	获取价格	IC 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, BGA30, 2.50 X 2.90 MM, MICRO, BGA-30, Audio Contr

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