參數(shù)資料
型號(hào)： LM4840MH/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(yè)數(shù)： 14/22頁(yè)
文件大?。?/td> 829K
代理商： LM4840MH/NOPB
National P/N LM4840 - Stereo 2W Audio Power Amplifiers with Digital Volume Control and Input Mux
The LM4840 is a monolithic integrated circuit that provides digital volume control and stereo bridged audio
power amplifiers capable of producing 2W into 4
with less than 1.0% THD or 2.2W into 3
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.
Features
q
PC98 and PC99 Compliant
q
Digital Volume Control Interface
q
System Beep Detect
q
Stereo switchable bridged/single-ended power amplifiers
q
"Click and pop" suppression circuitry
q
Thermal shutdown protection circuitry
q
Input Mux
q
Capless headphone drivers
q
Last volume memory from shutdown
Key Specification
PO at 1% THD+N
into 3
(LM4840LQ, LM4840MH) 2.2W (typ)
into 4
(LM4840LQ, LM4840MH) 2.0W (typ)
into 8
(LM4840) 1.1W (typ)
Single-ended mode - THD+N at 85mW into 32
1.0% (typ)
Shutdown current 0.2A (typ)
Applications
q
Portable and Desktop Computers
q
Multimedia Monitors
q
Portable Radios, PDAs, and Portable TVs
[Information as of 5-Aug-2002]
Search
file:///H|/imaging/BITTING/cpl/20020808_1/08062002_10/NATL/08062002_HTML/LM4840.html (2 of 3) [09-Aug-2002 3:05:51 PM]
相關(guān)PDF資料
PDF描述
LM4841MH/NOPB 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28
LM4841MHX/NOPB 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28
LM4841MT/NOPB 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28
LM4841MTX/NOPB 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28
LM4841LQ/NOPB 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, QCC28
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM4840MT 制造商:Texas Instruments 功能描述:AMP AUDIO STEREO 2W SMD TSSOP28
LM4840MT/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(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(shí)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)
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
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