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參數(shù)資料
| 型號： | LM4838 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable Gain |
| 中文描述： | 立體聲2W的音頻功率放大器直流音量控制及可選擇增益 |
| 文件頁數(shù)： | 1/36頁 |
| 文件大?。?/td> | 2085K |
| 代理商： | LM4838 |
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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 and
LM4838MTE 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 information.
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)
n
into 4
(LQ & MTE)
n
into 8
(MT, MTE, ITL, & LQ)
n
Single-ended mode - THD+N at 85mW into
32
n
Shutdown current
2.2W (typ)
2.0W (typ)
1.1W (typ)
1.0%(typ)
0.7μA (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
January 2003
L
2003 National Semiconductor Corporation
DS200133
www.national.com
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM4838LQ | Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable Gain |
| LM4838MT | Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable Gain |
| LM4838MTE | Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable Gain |
| LM4838ITL | Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable Gain |
| LM4838ITLX | Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable Gain |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4838BULN E WAF | 制造商:Texas Instruments 功能描述: |
| LM4838GR | 功能描述:IC AMP AUDIO PWR 2.2W 49UARRAY RoHS:否 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機(jī)，2-通道（立體聲） 在某負(fù)載時最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點(diǎn):I²C，麥克風(fēng)，靜音，短路保護(hù)，音量控制 安裝類型:表面貼裝 供應(yīng)商設(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) |
| LM4838ITL | 制造商:Texas Instruments 功能描述:AMP AUDIO STEREO 2.2W SMD 4838 |
| LM4838ITL/NOPB | 功能描述:IC AMP AUDIO PWR 2.2W 36USMD RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機(jī)，2-通道（立體聲） 在某負(fù)載時最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點(diǎn):I²C，麥克風(fēng)，靜音，短路保護(hù)，音量控制 安裝類型:表面貼裝 供應(yīng)商設(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) |
| LM4838ITLX | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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