Datasheet > LM4991_15

LM4991_15

更新时间： 2022-02-26 11:24:34

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3W Audio Power Amplifier with Shutdown Mode

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LM4991_15 数据手册

LM4991

www.ti.com

SNAS217A –MAY 2004–REVISED APRIL 2013

LM4991

3W Audio Power Amplifier with Shutdown Mode

Check for Samples: LM4991

FEATURES

DESCRIPTION

The LM4991 is a mono bridged audio power amplifier

capable of delivering 3W of continuous average

power into a 3Ω load with less than 10% THD when

conserve power in portable applications, the

LM4991's micropower shutdown mode (I_SD= 0.1µA,

typ) is activated when V_DDis applied to the

SHUTDOWN pin.

•

Available in Space-Saving WSON and SOIC

Packages

•

Ultra Low Current Shutdown Mode

Can Drive Capacitive Loads up to 500pF

Improved Click and Pop Circuitry Reduces

Noises During Turn-On and Turn-Off

Transitions

Boomer audio power amplifiers are designed

specifically to provide high power, high fidelity audio

output. They require few external components and

operate on low supply voltages from 2.2V to 5.5V.

Since the LM4991 does not require output coupling

capacitors, bootstrap capacitors, or snubber

networks, it is ideally suited for low-power portable

systems that require minimum volume and weight.

•

2.2 - 5.5V Operation

No Output Coupling Capacitors, Snubber

Networks, Bootstrap Capacitors or Gain-

Setting Resistors Required

•

Unity-Gain Stable

APPLICATIONS

Additional LM4991 features include thermal shutdown

protection, unity-gain stability, and external gain set.

•

Wireless and Cellular Handsets

PDAs

Note: An LM4991LD that has been properly mounted

to a circuit board will deliver 3W into 3Ω (at 10%

THD). The other package options for the LM4991 will

deliver 1.5W into 8Ω (at 10% THD). See the

Portable Computers

Desktop Computers

KEY SPECIFICATIONS

Application

information

LM4991M.

Information

concerning

sections

the LM4991LD

for

further

and

•

Improved PSRR at 217kHz and 1kHz: 64 dB

(typ)

•

P_Oat V_DD= 5.0V, 10% THD, 1kHz

–

LM4991LD (only), 3Ω, 4Ω: 3W (typ), 2.5 W

(typ)

–

All packages, 8Ω load: 1.5 W (typ)

•

Shutdown current: 0.1µA (typ)

Connection Diagrams

Top View

Figure 1. SOIC Package

See Package Number D0008A

Figure 2. WSON Package

See Package Number NGN0008A

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...22

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与LM4991_15相关器件

型号	品牌	描述	获取价格	数据表
LM4991LD	NSC	3W Audio Power Amplifier with Shutdown Mode	获取价格
LM4991LD/NOPB	TI	3W Audio Power Amplifier with Shutdown Mode	获取价格
LM4991LDX	NSC	IC 3 W, 1 CHANNEL, AUDIO AMPLIFIER, DSO8, LLP-8, Audio/Video Amplifier	获取价格
LM4991LDX/NOPB	TI	3W Audio Power Amplifier with Shutdown Mode	获取价格
LM4991MA	NSC	3W Audio Power Amplifier with Shutdown Mode	获取价格
LM4991MA/NOPB	NSC	IC 1.5 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8, SO-8, Audio/Video Amplifier	获取价格

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