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參數(shù)資料
| 型號(hào)： | LM4838MT/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(shù)： | 1/38頁 |
| 文件大?。?/td> | 2351K |
| 代理商： | LM4838MT/NOPB |
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LM4838
Stereo 2W Audio Power Amplifiers
with DC Volume Control and Selectable Gain
General Description
The LM4838 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 LM4838 incorporates a
DC volume control, stereo bridged audio power amplifiers
and a selectable gain or bass boost, making it optimally
suited for multimedia monitors, portable radios, desktop, and
portable computer applications.
The LM4838 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 LM4838LQ,
LM4838MTE, and LM4838GR will deliver 2W into 4
. The LM4838MT and
LM4838ITL will deliver 1.1W into 8
. See Application Information section
Exposed-DAP package PCB Mounting Considerations for more informa-
tion.
Note 2: An LM4838LQ and LM4838MTE 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
(LQ & MTE)
2.2W (typ)
n
into 4
(LQ, MTE, GR)
2.0W (typ)
n
into 8
(MT, MTE, ITL, LQ, & GR)
1.1W (typ)
n
Single-ended mode - THD+N at 85mW into
32
1.0%(typ)
n
Shutdown current
0.7A (typ)
Features
n
DC Volume Control Interface
n
System Beep Detect
n
Stereo switchable bridged/single-ended power amplifiers
n
Selectable internal/external gain and bass boost
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.
20013301
FIGURE 1. LM4838 Block Diagram
November 2004
LM4838
Stereo
2W
Audio
Power
Amplifiers
with
DC
V
olume
Control
and
Selectable
Gain
2004 National Semiconductor Corporation
DS200133
www.national.com
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM4838ITL/NOPB | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PBGA36 |
| LM4838ITLX/NOPB | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PBGA36 |
| LM4838LQ/NOPB | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, QCC28 |
| LM4838LQX/NOPB | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, QCC28 |
| LM4839MTE/NOPB | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4838MTX | 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 |
| LM4838MTX/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 |
| LM4839 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Stereo 2W Audio Power Amplifiers with DC Volume Control, Bass Boost, and Input Mux |
| LM4839A E WAF | 制造商:Texas Instruments 功能描述: |
| LM4839LQ | 制造商:Texas Instruments 功能描述:AMP AUDIO POWER DC VOLT LLP-28 |
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