Datasheet > LM4879

LM4879

更新时间： 2024-11-05 02:58:31

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
32页	1754K
描述
1.1 Watt Audio Power Amplifier

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LM4879 数据手册

LM4879, LM4879MMBD, LM4879SDBD

www.ti.com

SNAS142G –SEPTEMBER 2001–REVISED MAY 2013

LM4879

1.1 Watt Audio Power Amplifier

Check for Samples: LM4879, LM4879MMBD, LM4879SDBD

FEATURES

DESCRIPTION

The LM4879 is an audio power amplifier primarily

designed for demanding applications in mobile

phones and other portable communication device

applications. It is capable of delivering 1.1 watt of

continuous average power to an 8Ω BTL load with

less than 1% distortion (THD+N) from a 5V_DCpower

supply.

•

No Output Coupling Capacitors, Snubber

Networks or Bootstrap Capacitors Required

•

Unity Gain Stable

Ultra Low Current Shutdown Mode

Fast Turn On: 80ms (typ), 110ms (max) with

1.0µF Capacitor

Boomer™ audio power amplifiers were designed

specifically to provide high quality output power with a

minimal amount of external components. The

LM4879 does not require output coupling capacitors

or bootstrap capacitors, and therefore is ideally suited

for lower-power portable applications where minimal

space and power consumption are primary

requirements.

•

BTL Output Can Drive Capacitive Loads up to

100pF

Advanced Pop and Click Circuitry Eliminates

Noises During Turn-On and Turn-Off

Transitions

•

2.2V - 5.0V Operation

Available in Space-Saving DSBGA, WSON, and

VSSOP Packages

The LM4879 features a low-power consumption

global shutdown mode, which is achieved by driving

the shutdown pin with logic low. Additionally, the

LM4879 features an internal thermal shutdown

protection mechanism.

APPLICATIONS

•

Mobile Phones

PDAs

The LM4879 contains advanced pop and click

circuitry which eliminates noises which would

otherwise occur during turn-on and turn-off

transitions.

Portable electronic devices

KEY SPECIFICATIONS

•

PSRR: 5V, 3V at 217Hz: 62dB (typ)

The LM4879 is unity-gain stable and can be

configured by external gain-setting resistors.

Power Output at 5V, 1%THD+N: 1.1W (typ)

Power Output at 3V, 1%THD+N: 350mW (typ)

Shutdown Current: 0.1µA (typ)

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.

Boomer is a trademark of Texas Instruments.

All other 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.

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与LM4879相关器件

型号	品牌	获取价格	描述	数据表
LM4879IBL	NSC	获取价格	1.1 Watt Audio Power Amplifier
LM4879IBLX	NSC	获取价格	1.1 Watt Audio Power Amplifier
LM4879IBP	ROCHESTER	获取价格	Audio Amplifier, 1.1W, 1 Channel(s), 1 Func, PBGA8, MO-211BC, MICRO, SMD-8
LM4879IBP	NSC	获取价格	1.1 Watt Audio Power Amplifier
LM4879IBPX	NSC	获取价格	1.1 Watt Audio Power Amplifier
LM4879ITL	NSC	获取价格	1.1 Watt Audio Power Amplifier
LM4879ITL/NOPB	TI	获取价格	1.1 Watt Audio Power Amplifier 9-DSBGA -40 to 85
LM4879ITL/NOPB	NSC	获取价格	IC 1.1 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9, MICRO, SMD-9, Audio/Video Amplifier
LM4879ITLX	NSC	获取价格	1.1 Watt Audio Power Amplifier
LM4879ITLX/NOPB	TI	获取价格	1.1W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9, MICRO, SMD-9

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