Datasheet > LM4873MT

LM4873MT

更新时间： 2024-09-20 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
19页	535K
描述
Dual 2.1W Audio Amplifier Plus Stereo Headphone Function

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LM4873MT 数据手册

April 2000

LM4873

Dual 2.1W Audio Amplifier Plus Stereo Headphone

Function

General Description

Key Specifications

The LM4873 is a dual bridge-connected audio power ampli-

fier which, when connected to a 5V supply, will deliver 2.1W

to a 4Ω load (Note 1) or 2.4W to a 3Ω load (Note 2)with less

than 1.0% THD+N. In addition, the headphone input pin al-

lows the amplifiers to operate in single-ended mode to drive

stereo headphones. A Mux Control pin toggles between the

two stereo sets of amplifier inputs, allowing for two select-

able amplifier closed-loop responses.

n P_Oat 1% THD+N

into 3Ω (LM4873MTE-1)

into 4Ω (LM4873MTE-1)

into 4Ω (LM4873MTE)

into 8Ω (LM4873)

2.4W(typ)

2.1W(typ)

1.9W(typ)

1.1W(typ)

0.5%(max)

n Single-ended mode - THD+N

at 75mW into 32Ω

Boomer audio power amplifiers were designed specifically to

provide high quality output power from a surface mount

package while requiring few external components. To sim-

plify audio system design, the LM4873 combines dual bridge

speaker amplifiers and stereo headphone amplifiers on one

chip.

n Shutdown current

0.7µA(typ)

Features

n Input mux control and two separate inputs per channel

n Stereo headphone amplifier mode

n “Click and pop” suppression circuitry

n Thermal shutdown protection circuitry

The LM4873 features an externally controlled, low-power

consumption shutdown mode, a stereo headphone amplifier

mode, and thermal shutdown protection. It also utilizes cir-

cuitry to reduce “clicks and pops” during device turn-on.

n Exposed-DAP TSSOP and TSSOP packaging available

Note 1: An LM4873MTE-1 which has been properly mounted to the circuit

board will deliver 2.1W into 4Ω. The other package options for the LM4873

will deliver 1.1W into 8Ω. See the Application Information section for

LM4873MTE-1 usage information.

Applications

n Multimedia monitors

n Portable and desktop computers

n Portable audio systems

Note 2: An LM4873MTE-1 which has been properly mounted to the circuit

board and forced-air cooled will deliver 2.4W into 3Ω.

Typical Application

DS100993-31

Refer to the section Proper Selection of External Components, for a detailed discussion of C size.

FIGURE 1. Typical Audio Amplifier Application Circuit

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

DS100993

www.national.com

12 3 4 5 6 7...19

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与LM4873MT相关器件

型号	品牌	获取价格	描述	数据表
LM4873MT/NOPB	ROCHESTER	获取价格	1.9W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20, 4.40 MM, PLASTIC, TSSOP-20
LM4873MTE	NSC	获取价格	Dual 2.1W Audio Amplifier Plus Stereo Headphone Function
LM4873MTE/NOPB	ROCHESTER	获取价格	2.2W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20, 6.50 X 4.40 MM, 0.90 MM HEIGHT, TSSOP-20
LM4873MTE-1	NSC	获取价格	Dual 2.1W Audio Amplifier Plus Stereo Headphone Function
LM4873MTE-1	ROCHESTER	获取价格	3W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO28, 9.70 X 4.40 MM, 0.90 MM HEIGHT, TSSOP-28
LM4873MTE-1	TI	获取价格	3W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO28, 9.70 X 4.40 MM, 0.90 MM HEIGHT, TSSOP-28
LM4873MTEX/NOPB	NSC	获取价格	IC 2.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20, 6.50 X 4.40 MM, 0.90 MM HEIGHT, TSSOP-20, Au
LM4873MTEX-1	TI	获取价格	3W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO28, 9.70 X 4.40 MM, 0.90 MM HEIGHT, TSSOP-28
LM4873MTX	TI	获取价格	1.9W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20, 4.40 MM, PLASTIC, TSSOP-20
LM4874	NSC	获取价格	2.1W Differential Input, BTL Output Stereo Audio Amplifier with Selectable Gain and Shutdo

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