參數(shù)資料
型號： LM4838ITLX/NOPB
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 音頻控制
英文描述： 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PBGA36
封裝： MICRO, SMD-36
文件頁數(shù)： 1/38頁
文件大小： 2351K
代理商： LM4838ITLX/NOPB
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PDF資料
PDF描述
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
LM4839MTEX/NOPB 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28
LM4839MT/NOPB 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28
相關代理商/技術參數(shù)
參數(shù)描述
LM4838LQ 制造商:Texas Instruments 功能描述:AMP AUDIO POWER DC VOLT LLP-28
LM4838LQ/NOPB 功能描述:IC AMP AUDIO PWR 2.2W STER 28LLP RoHS:是 類別:集成電路 (IC) >> 線性 - 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:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機，2-通道（立體聲） 在某負載時最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點:I²C，麥克風，靜音，短路保護，音量控制 安裝類型:表面貼裝 供應商設備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR)
LM4838LQX/NOPB 功能描述:IC AMP AUDIO PWR 2.2W STER 28LLP RoHS:是 類別:集成電路 (IC) >> 線性 - 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:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機，2-通道（立體聲） 在某負載時最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點:I²C，麥克風，靜音，短路保護，音量控制 安裝類型:表面貼裝 供應商設備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR)
LM4838MT 制造商:Texas Instruments 功能描述:AMP AUDIO STEREO 2W SMD TSSOP28
LM4838MT/NOPB 功能描述:IC AMP AUDIO PWR 2.2W AB 28TSSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 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:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機，2-通道（立體聲） 在某負載時最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點:I²C，麥克風，靜音，短路保護，音量控制 安裝類型:表面貼裝 供應商設備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR)
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