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參數資料
| 型號： | LM4840MTX/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28 |
| 封裝： | TSSOP-28 |
| 文件頁數： | 1/22頁 |
| 文件大小： | 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 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LM4841 | 制造商:NSC 制造商全稱: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: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 產品:General Purpose Audio Amplifiers 輸出類型: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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM48410SQBD | 功能描述:音頻 IC 開發工具 LM48410 EVAL BOARD RoHS:否 制造商:Texas Instruments 產品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
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