Datasheet > LM4869

LM4869

更新时间： 2024-11-09 04:20:07

品牌	Logo	应用领域
美国国家半导体 - NSC		音频放大器
页数	文件大小	规格书
20页	833K
描述
1.9W Differential Input, BTL Output Stereo Audio Amplifier with Selectable Gain and Shutdown

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LM4869 数据手册

August 2002

LM4869

1.9W Differential Input, BTL Output Stereo Audio

Amplifier with Selectable Gain and Shutdown

General Description

Micropower shutdown current

0.1µA (typ)

62dB (typ)

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

The LM4869 features differential stereo inputs, BTL (bridge-

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

Operating on a single 5V supply, the LM4869 delivers 1.2W

and 1.9W (typ) of output power to an 8Ω and 4Ω BTL load

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

LM4869’s gain is selected using two digital inputs. The nomi-

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

Features

n Fully differential input and output

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 2.0V to 5.5V operation

The LM4869 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 Available in space-saving exposed-DAP TSSOP

package

Other features include an active-low micropower shutdown

mode input and thermal shutdown protection.

Applications

n Notebook computers

n PDAs

Key Specifications

BTL output Power

n Portable electronic devices

R_L= 4Ω, V_DD= 5.0V, and THD+N = 1%

BTL output Power

1.9W (typ)

1.2W (typ)

R_L= 8Ω, V_DD= 5.0V, and THD+N = 1%

Connection Diagram

Top View

20042802

Order Number LM4869MH

See NS Package Number MXA20A for Exposed-DAP TSSOP

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

DS200428

www.national.com

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与LM4869相关器件

型号	品牌	获取价格	描述	数据表
LM4869MH	NSC	获取价格	1.9W Differential Input, BTL Output Stereo Audio Amplifier with Selectable Gain and Shutdo
LM4869MHX/NOPB	TI	获取价格	2.6W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20, EXPOSED PAD, TSSOP-20
LM4870	NSC	获取价格	1.1W Audio Power Amplifier with Shutdown Mode
LM4870M	NSC	获取价格	1.1W Audio Power Amplifier with Shutdown Mode
LM4870MX	NSC	获取价格	暂无描述
LM4871	NSC	获取价格	1.1W Audio Power Amplifier with Shutdown Mode
LM4871	TI	获取价格	3W Audio Power Amplifier with Shutdown Mode
LM4871_03	NSC	获取价格	3W Audio Power Amplifier with Shutdown Mode
LM4871LD	TI	获取价格	3W Audio Power Amplifier with Shutdown Mode
LM4871LD/NOPB	TI	获取价格	3W Audio Power Amplifier with Shutdown Mode