LM4992

更新时间： 2024-09-20 23:16:47

品牌	Logo	应用领域
美国国家半导体 - NSC		音频放大器手机
页数	文件大小	规格书
16页	573K
描述
420mW Stereo Cell Phone Audio Amplifier

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LM4992 数据手册

February 2004

LM4992

420mW Stereo Cell Phone Audio Amplifier

General Description

Key Specifications

The LM4992 is a stereo audio power amplifier primarily

designed for demanding applications in mobile phones and

other portable communication device applications. It is ca-

pable of delivering 1 watt, per channel, of continuous aver-

age power to an 8Ω BTL load with less than 1% distortion

(THD+N) from a 5V_DCpower supply.

Improved PSRR at 217Hz & 1KHz

Stereo Output Power at 5.0V,

1% THD, 8Ω

64dB (1KHz)

1.07W (typ)

Stereo Output Power at 3.3V,

1% THD, 8Ω

420mW (typ)

0.2µA (typ)

Boomer audio power amplifiers were designed specifically to

provide high quality output power with a minimal amount of

external components. The LM4992 does not require output

coupling capacitors or bootstrap capacitors, and therefore is

ideally suited for mobile phone and other low voltage appli-

cations where minimal power consumption is a primary re-

quirement.

Shutdown Current, V_dd= 3.3V

Features

n Available in space-saving LLP package

n Ultra low current shutdown mode

n BTL output can drive capacitive loads

The LM4992 features independent shutdown control for

each channel and a low-power consumption shutdown

mode, which is achieved by driving both shutdown pins with

logic low. Additionally, the LM4992 features an internal ther-

mal shutdown protection mechanism.

n Improved pop & click circuitry eliminates noise during

turn-on and turn-off transitions

n 2.2 - 5.5V operation

n No output coupling capacitors, snubber networks or

bootstrap capacitors required

n Unity-gain stable

The LM4992 contains advanced pop & click circuitry which

eliminates noise which would otherwise occur during turn-on

and turn-off transitions.

n External gain configuration capability

The LM4992 is unity-gain stable and can be configured by

external gain-setting resistors.

Applications

n Mobile Phones

n PDAs

n Portable electronic devices

Connection Diagram

SDA14A

200761E6

Top View

Order Number LM4992SD

See NS Package Number SDA14A

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

DS200761

www.national.com

12 3 4 5 6 7...16

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与LM4992相关器件

型号	品牌	获取价格	描述	数据表
LM4992SD	NSC	获取价格	420mW Stereo Cell Phone Audio Amplifier
LM4992SD/NOPB	ROCHESTER	获取价格	1.07W, 2 CHANNEL, AUDIO AMPLIFIER, DSO14, LLP-14
LM4992SDX	NSC	获取价格	IC 1.07 W, 2 CHANNEL, AUDIO AMPLIFIER, DSO14, LLP-14, Audio/Video Amplifier
LM4992SDX/NOPB	TI	获取价格	AUDIO AMPLIFIER
LM4995	NSC	获取价格	BOOMER-R AUDIO POWER AMPLIFIER SERIES
LM4995	TI	获取价格	1.3 W Audio Power Amplifier
LM4995_07	NSC	获取价格	1.3W Audio Power Amplifier
LM4995_15	TI	获取价格	1.3 W Audio Power Amplifier
LM4995SD	NSC	获取价格	IC 1.25 W, 1 CHANNEL, AUDIO AMPLIFIER, DSO8, 3 X 3 MM, 0.5 PICTH, LLP-8, Audio/Video Ampli
LM4995SD/NOPB	TI	获取价格	1.3 W Audio Power Amplifier