Datasheet > LM4838MT

LM4838MT

更新时间： 2024-11-06 22:51:51

品牌	Logo	应用领域
美国国家半导体 - NSC		放大器功率放大器
页数	文件大小	规格书
36页	2078K
描述
Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable Gain

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LM4838MT 数据手册

January 2003

LM4838

Stereo 2W Audio Power Amplifiers

with DC Volume Control and Selectable Gain

General Description

Key Specifications

n P_Oat 1% THD+N

The LM4838 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) with less than

1.0% THD or 2.2W into 3Ω (Note 2) with less than 1.0%

THD.

into 3Ω (LQ & MTE)

into 4Ω (LQ & MTE)

into 8Ω (MT, MTE, ITL, & LQ)

2.2W (typ)

2.0W (typ)

1.1W (typ)

n Single-ended mode - THD+N at 85mW into

Boomer^®audio integrated circuits were designed specifically

to provide high quality audio while requiring a minimum

amount of external components. The LM4838 incorporates a

DC volume control, stereo bridged audio power amplifiers

and a selectable gain or bass boost, making it optimally

suited for multimedia monitors, portable radios, desktop, and

portable computer applications.

32Ω

1.0%(typ)

0.7µA (typ)

n Shutdown current

Features

n DC Volume Control Interface

n System Beep Detect

n Stereo switchable bridged/single-ended power amplifiers

n Selectable internal/external gain and bass boost

n “Click and pop” suppression circuitry

The LM4838 features an externally controlled, low-power

consumption shutdown mode, and both a power amplifier

and headphone mute for maximum system flexibility and

performance.

n Thermal shutdown protection circuitry

Note 1: When properly mounted to the circuit board, the LM4838LQ and

LM4838MTE will deliver 2W into 4Ω. The LM4838MT and LM4838ITL will

deliver 1.1W into 8Ω. See Application Information section Exposed-DAP

package PCB Mounting Considerations for more information.

Applications

n Portable and Desktop Computers

n Multimedia Monitors

Note 2: An LM4838LQ and LM4838MTE that have been properly mounted

to the circuit board and forced-air cooled will deliver 2.2W into 3Ω.

n Portable Radios, PDAs, and Portable TVs

Block Diagram

20013301

FIGURE 1. LM4838 Block Diagram

Boomer^®is a registered trademark of NationalSemiconductor Corporation.

DS200133

www.national.com

12 3 4 5 6 7...36

中文翻译

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与LM4838MT相关器件

型号	品牌	获取价格	描述	数据表
LM4838MTE	NSC	获取价格	Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable Gain
LM4838MTE/NOPB	TI	获取价格	2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28, TSSOP-28
LM4838MTEX	NSC	获取价格	IC 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28, TSSOP-28, Audio Control IC
LM4838MTEX/NOPB	NSC	获取价格	IC 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28, TSSOP-28, Audio Control IC
LM4838MTEX/NOPB	TI	获取价格	具有 DC 音量控制和可选增益的立体声 2W 音频功率放大器 \| PWP \| 28 \| -
LM4838MTX	TI	获取价格	IC 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28, TSSOP-28, Audio Control IC
LM4838MTX/NOPB	NSC	获取价格	IC 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28, TSSOP-28, Audio Control IC
LM4839	NSC	获取价格	Stereo 2W Audio Power Amplifiers with DC Volume Control, Bass Boost, and Input Mux
LM4839LQ	NSC	获取价格	Stereo 2W Audio Power Amplifiers with DC Volume Control, Bass Boost, and Input Mux
LM4839LQ	ROCHESTER	获取价格	2 CHANNEL(S), TONE CONTROL CIRCUIT, CQCC28, LLP-28

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