LM4990MM datasheet(1/19 Pages) NSC

部品番号	LM4990MM

部品情報	2 Watt Audio Power Amplifier with Selectable Shutdown Logic Level

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LM4990

2 Watt Audio Power Amplifier with Selectable Shutdown

Logic Level

General Description

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 8

Ω

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

MH only) to a 4

Ω BTL load with less than 1% distortion

(THD+N+N) from a 5V

DC power supply.

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.

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.

The LM4990 contains advanced pop & click circuitry which

eliminates noise which would otherwise occur during turn-on

and turn-off transitions.

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

external gain-setting resistors.

Key Specifications

j Improved PSRR at 217Hz & 1KHz

62dB

j Power Output at 5.0V, 1%

THD+N,

4

Ω (LD and MH only)

2W (typ)

j Power Output at 5.0V, 1% THD+N, 8

Ω

1.25W (typ)

j Power Output at 3.0V, 1% THD+N, 4

Ω 600mW (typ)

j Power Output at 3.0V, 1% THD+N, 8

Ω 425mW (typ)

j Shutdown Current

0.1µA (typ)

Features

n

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

TSSOP, MSOP, and ITL

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

n

No output coupling capacitors, snubber networks or

bootstrap capacitors required

n

Unity-gain stable

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

200510B9

Top View

Order Number LM4990MM

See NS Package Number MUA08A

20051071

Top View

Z - Plant Code

X - Date Code

TT - Die Traceability

G - Boomer Family

A5 - LM4990MM

Boomer® is a registered trademark of National Semiconductor Corporation.

January 2004

DS200510

www.national.com

同様の部品番号 - LM4990MM

メーカー	部品番号	データシート	部品情報
Texas Instruments	LM4990MM/NOPB	1Mb / 28P	[Old version datasheet] 2 Watt Audio Power Amplifier with Selectable Shutdown Logic Level
Texas Instruments	LM4990MMX/NOPB	1Mb / 28P	[Old version datasheet] 2 Watt Audio Power Amplifier with Selectable Shutdown Logic Level

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