LM4990

更新时间： 2024-11-24 23:16:47

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
19页	724K
描述
2 Watt Audio Power Amplifier with Selectable Shutdown Logic Level

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LM4990 数据手册

January 2004

LM4990

2 Watt Audio Power Amplifier with Selectable Shutdown

Logic Level

General Description

Key Specifications

The LM4990 is an audio power amplifier primarily designed

for demanding applications in mobile phones and other por-

table communication device applications. It is capable of

delivering 1.25 watts of continuous average power to an 8Ω

BTL load and 2 watts of continuous average power (LD and

MH only) to a 4Ω BTL load with less than 1% distortion

(THD+N+N) from a 5V_DCpower supply.

Improved PSRR at 217Hz & 1KHz

62dB

Power Output at 5.0V, 1%

THD+N,

4Ω (LD and MH only)

Power Output at 5.0V, 1% THD+N, 8Ω

2W (typ)

1.25W (typ)

Power Output at 3.0V, 1% THD+N, 4Ω 600mW (typ)

Power Output at 3.0V, 1% THD+N, 8Ω 425mW (typ)

Boomer audio power amplifiers were designed specifically to

provide high quality output power with a minimal amount of

external components. The LM4990 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

0.1µA (typ)

Features

n Available in space-saving packages: LLP, Exposed-DAP

TSSOP, MSOP, and ITL

The LM4990 features a low-power consumption shutdown

mode. To facilitate this, Shutdown may be enabled by either

logic high or low depending on mode selection. Driving the

shutdown mode pin either high or low enables the shutdown

pin to be driven in a likewise manner to enable shutdown.

n Ultra low current shutdown mode

n Improved pop & click circuitry eliminates noise during

turn-on and turn-off transitions

n 2.2 - 5.5V operation

The LM4990 contains advanced pop & click circuitry which

eliminates noise which would otherwise occur during turn-on

and turn-off transitions.

n No output coupling capacitors, snubber networks or

bootstrap capacitors required

n Unity-gain stable

The LM4990 is unity-gain stable and can be configured by

external gain-setting resistors.

n External gain configuration capability

n User selectable shutdown High or Low logic Level

Applications

n Mobile Phones

n PDAs

n Portable electronic devices

Connection Diagrams

Mini Small Outline (MSOP) Package

MSOP Marking

20051071

Top View

Z - Plant Code

200510B9

Top View

Order Number LM4990MM

See NS Package Number MUA08A

X - Date Code

TT - Die Traceability

G - Boomer Family

A5 - LM4990MM

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

DS200510

www.national.com

12 3 4 5 6 7...19

中文翻译

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与LM4990相关器件

型号	品牌	获取价格	描述	数据表
LM4990_15	TI	获取价格	2 Watt Audio Power Amplifier with Selectable Shutdown Logic Level
LM4990ITL	NSC	获取价格	2 Watt Audio Power Amplifier with Selectable Shutdown Logic Level
LM4990ITL/NOPB	NSC	获取价格	IC 2 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9, MICRO SMD-9, Audio/Video Amplifier
LM4990ITL/NOPB	TI	获取价格	2 Watt Audio Power Amplifier with Selectable Shutdown Logic Level
LM4990ITLX	NSC	获取价格	2 Watt Audio Power Amplifier with Selectable Shutdown Logic Level
LM4990ITLX/NOPB	TI	获取价格	2 Watt Audio Power Amplifier with Selectable Shutdown Logic Level
LM4990LD	NSC	获取价格	2 Watt Audio Power Amplifier with Selectable Shutdown Logic Level
LM4990LD/NOPB	TI	获取价格	2 Watt Audio Power Amplifier with Selectable Shutdown Logic Level
LM4990LDX	NSC	获取价格	IC 2 W, 1 CHANNEL, AUDIO AMPLIFIER, DSO10, LLP-10, Audio/Video Amplifier
LM4990MH	NSC	获取价格	2 Watt Audio Power Amplifier with Selectable Shutdown Logic Level

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