Datasheet > LM4874MH

LM4874MH

更新时间： 2024-11-03 22:51:39

品牌	Logo	应用领域
美国国家半导体 - NSC		商用集成电路音频放大器光电二极管
页数	文件大小	规格书
21页	866K
描述
2.1W Differential Input, BTL Output Stereo Audio Amplifier with Selectable Gain and Shutdown

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LM4874MH 数据手册

August 2002

LM4874

2.1W Differential Input, BTL Output Stereo Audio

Amplifier with Selectable Gain and Shutdown

General Description

BTL output power

R_L= 8Ω, V_DD= 5.0V, and THD+N = 1%

Micropower shutdown current

1.2W (typ)

0.1µA (typ)

62dB (typ)

The LM4874 features differential stereo inputs, BTL (bridge-

tied load) outputs, and four externally selectable fixed gains.

Operating on a single 5V supply, the LM4874 delivers 1.2W,

1.9W, or 2.1W (typ) of output power to an 8Ω, 4Ω, or 3Ω BTL

load (Note 1), respectively, with less than 1% THD+N. The

LM4874’s gain is selected using two digital inputs. The nomi-

nal gain values are 6dB, 10dB, 15.6dB, and 21.6dB.

PSRR ( 1kHz, V_DD= 5V, (Fig.1))

Features

n Fully differential input and output

The LM4874 is designed for notebook and other handheld

portable applications. It delivers high quality output power

from a surface-mount package and requires few external

components.

n Internal gain set: 6dB, 10dB, 15.6dB, and 21.6dB

n Improved ’click and pop’ suppression

n Thermal shutdown protection circuit

n Ultra low current micropower shutdown mode

n 3.0V to 5.5V operation

Other features include an active-low micropower shutdown

mode input and thermal shutdown protection.

n Available in space-saving exposed-DAP TSSOP

package

Key Specifications

BTL output power

Applications

n Notebook computers

n PDAs

R_L= 3Ω, V_DD= 5.0V, and THD+N = 1%

BTL output power

2.1W (typ)

1.9W (typ)

n Portable electronic devices

R_L= 4Ω, V_DD= 5.0V, and THD+N = 1%

Connection Diagram

Top View

20046902

Order Number LM4874MH

See NS Package Number MXA20A for Exposed-DAP TSSOP

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

DS200469

www.national.com

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LM4874MH 替代型号

型号	品牌	替代类型	描述	数据表
TPA6017A2PWPG4	TI	类似代替	2-W STEREO AUDIO POWER AMPLIFIER WITH FOUR SELECTABLE GAIN SETTINGS
TPA6017A2PWPR	TI	功能相似	2-W STEREO AUDIO POWER AMPLIFIER WITH FOUR SELECTABLE GAIN SETTINGS
TPA6017A2PWP	TI	功能相似	2 W STEREO AUDIO POWER AMPLIFIER WITH FOUR SELECTABLE GAIN SETTINGS

与LM4874MH相关器件

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LM4875	NSC	获取价格	750 mW Audio Power Amplifier with DC Volume Control and Headphone Switch
LM4875	TI	获取价格	具有精密直流音量控制和耳机放大器的 750mW、立体声、模拟输入、AB 类音频放大器
LM4875M	NSC	获取价格	750 mW Audio Power Amplifier with DC Volume Control and Headphone Switch
LM4875M/NOPB	NSC	获取价格	IC 1 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO8, SOIC-8, Audio Control IC
LM4875M/NOPB	TI	获取价格	具有精密直流音量控制和耳机放大器的 750mW、立体声、模拟输入、AB 类音频放大器 \|
LM4875MM	NSC	获取价格	750 mW Audio Power Amplifier with DC Volume Control and Headphone Switch
LM4875MM/NOPB	NSC	获取价格	IC 1 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO8, 0.118 INCH, MSOP-8, Audio Control IC
LM4875MM/NOPB	TI	获取价格	具有精密直流音量控制和耳机放大器的 750mW、立体声、模拟输入、AB 类音频放大器 \|
LM4875MX/NOPB	NSC	获取价格	IC 1 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO8, SOIC-8, Audio Control IC
LM4875MX/NOPB	TI	获取价格	具有精密直流音量控制和耳机放大器的 750mW、立体声、模拟输入、AB 类音频放大器 \|

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