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參數資料
| 型號： | LM4843MHX/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO20 |
| 封裝： | TSSOP-20 |
| 文件頁數： | 1/19頁 |
| 文件大小： | 597K |
| 代理商： | LM4843MHX/NOPB |
LM4843
Stereo 2W Audio Power Amplifiers
with DC Volume Control
General Description
The LM4843 is a monolithic integrated circuit that provides
DC volume control, and stereo bridged audio power amplifi-
ers 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 LM4843 incorporates a
DC volume control with stereo bridged audio power amplifi-
ers making it optimally suited for multimedia monitors, por-
table radios, desktop, and portable computer applications.
The LM4843 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 LM4843MH will
deliver 2W into 4
. See the Application Information section for LM4843MH
usage information.
Note 2: LM4843MH that has 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
2.2W (typ)
n
into 4
2.0W (typ)
n
into 8
1.1W (typ)
n
Shutdown current
0.7A (typ)
Features
n
Acoustically Enhanced DC Volume Control Taper
n
Stereo bridged power amplifiers
n
“Click and pop” suppression circuitry
n
Thermal shutdown protection circuitry
Applications
n
Portable and Desktop Computers
n
Multimedia Monitors
n
Portable Radios, PDAs, and Portable TVs
Block Diagram
Boomer is a registered trademark of NationalSemiconductor Corporation.
20038389
FIGURE 1. LM4843 Block Diagram
July 2002
LM4843
Stereo
2W
Audio
Power
Amplifiers
with
DC
V
olume
Control
2002 National Semiconductor Corporation
DS200383
www.national.com
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| LM4850MM/NOPB | 0.3 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO10 |
| LM4850MT/NOPB | 0.3 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO14 |
| LM4850LD/NOPB | 0.3 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO14 |
| LM4850LDX/NOPB | 0.3 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO14 |
| LM4850MMX/NOPB | 0.3 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO10 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LM4844 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Stereo 1.2W Audio Sub-system with 3D Enhancement |
| LM4844_07 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Stereo 1.2W Audio Sub-System with 3D Enhancement |
| LM4844TL/NOPB | 功能描述:接口—CODEC RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉換速率:48 kSPs 接口類型:I2C ADC 數量:2 DAC 數量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| LM4844TLEVAL | 功能描述:BOARD EVALUATION LM4844TL RoHS:否 類別:編程器，開發系統 >> 評估板 - 音頻放大器 系列:Boomer® 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- |
| LM4844TLX/NOPB | 功能描述:接口—CODEC RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉換速率:48 kSPs 接口類型:I2C ADC 數量:2 DAC 數量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
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