參數(shù)資料
型號(hào)： LM4840MTX/NOPB
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 音頻控制
英文描述： 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28
封裝： TSSOP-28
文件頁(yè)數(shù)： 1/22頁(yè)
文件大?。?/td> 829K
代理商： LM4840MTX/NOPB
LM4840
Stereo 2W Audio Power Amplifiers
with Digital Volume Control and Input Mux
General Description
The LM4840 is a monolithic integrated circuit that provides
digital volume control and stereo bridged audio power am-
plifiers capable of producing 2W into 4
(Note 1) with less
than 1.0% THD or 2.2W into 3
(Note 2) with less than 1.0%
THD.
Boomer audio integrated circuits were designed specifically
to provide high quality audio while requiring a minimum
amount of external components. The LM4840 incorporates a
digital volume control, stereo bridged audio power amplifiers,
an input mux, and a last volume level memory function to
save the volume setting during shutdown. These features
make it optimally suited for multimedia monitors, portable
radios, desktop, and portable computer applications.
The LM4840 features an externally controlled, low-power
consumption shutdown mode, and both a power amplifier
and headphone mute for maximum system flexibility and
performance.
Note 1: When properly mounted to the circuit board, the LM4840LQ and
LM4840MH will deliver 2W into 4
. The LM4840MT will deliver 1.1W into 8.
See the Application Information section LM4840LQ and for LM4840MH us-
age information.
Note 2: An LM4840LQ and LM4840MH that have been properly mounted to
the circuit board and forced-air cooled will deliver 2.2W into 3
.
Key Specifications
n
P
O at 1% THD+N
n
into 3
(LM4840LQ, LM4840MH)
2.2W (typ)
n
into 4
(LM4840LQ, LM4840MH)
2.0W (typ)
n
into 8
(LM4840)
1.1W (typ)
n
Single-ended mode - THD+N at 85mW into 32
1.0%
(typ)
n
Shutdown current
0.2A (typ)
Features
n
PC98 and PC99 Compliant
n
Digital Volume Control Interface
n
System Beep Detect
n
Stereo switchable bridged/single-ended power amplifiers
n
“Click and pop” suppression circuitry
n
Thermal shutdown protection circuitry
n
Input Mux
n
Capless headphone drivers
n
Last volume memory from shutdown
Applications
n
Portable and Desktop Computers
n
Multimedia Monitors
n
Portable Radios, PDAs, and Portable TVs
Connection Diagram
Boomer is a registered trademark of NationalSemiconductor Corporation.
LLP Package
DS200104-35
Top View
Order Number LM4840LQ
See NS Package Number LQA028A for Exposed-DAP LLP
December 2001
LM4840
Stereo
2W
Audio
Power
Amplifiers
with
Digital
V
olume
Control
and
Input
Mux
2001 National Semiconductor Corporation
DS200104
www.national.com
相關(guān)PDF資料
PDF描述
LM4840MT/NOPB 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28
LM4840MHX/NOPB 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28
LM4840MH/NOPB 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28
LM4841MH/NOPB 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28
LM4841MHX/NOPB 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM4841 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:Stereo 2W Amplifiers with DC Volume Control, Transient Free Outputs, and Cap-less Headphone Drive
LM48410 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:Low EMI, Filterless, 2.3W Stereo Class D Audio Power Amplifier with National 3D Enhancement
LM48410SQ 制造商:Texas Instruments 功能描述:Audio Amp Speaker 2-CH Stereo 2.3W Class-D 24-Pin LLP EP T/R 制造商:Texas Instruments 功能描述:AMP, POWER, CLASS D, 2.3W, LLP-24
LM48410SQ/NOPB 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
LM48410SQBD 功能描述:音頻 IC 開(kāi)發(fā)工具 LM48410 EVAL BOARD RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類(lèi)型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
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