Datasheet > LM4938

LM4938

更新时间： 2024-11-22 11:13:47

品牌	Logo	应用领域
德州仪器 - TI		放大器功率放大器
页数	文件大小	规格书
36页	9316K
描述
具有 DC 音量控制和可选增益的立体声 2W 音频功率放大器

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LM4938 数据手册

LM4938

www.ti.com

SNAS245B –FEBRUARY 2005–REVISED MAY 2013

LM4938 Boomer™ Audio Power Amplifier Series Stereo 2W Audio Power Amplifiers

with DC Volume Control and Selectable Gain

Check for Samples: LM4938

FEATURES

DESCRIPTION

The LM4938 is a monolithic integrated circuit that

provides DC volume control, and stereo bridged

audio power amplifiers capable of producing 2W into

4Ω with less than 1.0% THD or 2.2W into 3Ω with

less than 1.0% THD.

•

Improved Click and Pop Circuitry Virtually

Eliminates Noise During Turn On/Off

Transitions

•

DC Volume Control Interface

System Beep Detect

Boomer audio integrated circuits were designed

specifically to provide high quality audio while

requiring a minimum amount of external components.

The LM4938 incorporates a DC volume control,

Stereo Switchable Bridged/Single-Ended

Power Amplifiers

•

Selectable Internal/External Gain and Bass

Boost

stereo bridged audio power amplifiers and

selectable gain or bass boost, making it optimally

suited for multimedia monitors, portable radios,

desktop, and portable computer applications.

•

Thermal Shutdown Protection Circuitry

Unity Gain Stable

The LM4938 features an externally controlled, low-

power consumption shutdown mode, and both a

power amplifier and headphone mute for maximum

system flexibility and performance.

APPLICATIONS

•

Flat Panel Displays

Portable and Desktop Computers

Multimedia Monitors

Note 1: When properly mounted to the circuit board,

LM4938MH will deliver 2W into 4Ω. See Application

Information section HTSSOP PACKAGE PCB

Portable Radios, PDAs, and Portable TVs

MOUNTING

information.

CONSIDERATIONS

for

KEY SPECIFICATIONS

•

P_Oat 1% THD+N

Note 2: An LM4938MH that has been properly

mounted to the circuit board and forced-air cooled will

deliver 2.2W into 3Ω.

–

into 3Ω: 2.2W (typ)

into 4Ω: 2.0W (typ)

into 8Ω: 1.3W (typ)

•

Single-ended mode

THD+N at 92mW into 32Ω: 1.0% (typ)

Shutdown Current: 0.5µA (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.

12 3 4 5 6 7...36

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与LM4938相关器件

型号	品牌	获取价格	描述	数据表
LM4938MH	NSC	获取价格	Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable Gain
LM4938MH/NOPB	TI	获取价格	具有 DC 音量控制和可选增益的立体声 2W 音频功率放大器 \| PWP \| 28 \| -
LM4938MHX	NSC	获取价格	IC 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28, TSSOP-28, Audio Control IC
LM4938MHX/NOPB	TI	获取价格	具有 DC 音量控制和可选增益的立体声 2W 音频功率放大器 \| PWP \| 28 \| -
LM494	NSC	获取价格	Pulse Width Modulated Control Circuit
LM4940	NSC	获取价格	6W Streo Audio Power Amplifier
LM4940TS	NSC	获取价格	IC 4.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PSSO9, PLASTIC, TO-263, 9 PIN, Audio/Video Amplifier
LM4940TS/NOPB	TI	获取价格	6W Stereo Audio Power Amplifier
LM4940TS/NOPB	NSC	获取价格	IC 4.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PSSO9, PLASTIC, TO-263, 9 PIN, Audio/Video Amplifier
LM4940TSX	TI	获取价格	6W Stereo Audio Power Amplifier

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