參數(shù)資料
型號： LM4840
廠商： National Semiconductor Corporation
英文描述： RES 20.5 OHM 1/10W 1% 0603 SMD
中文描述： 立體聲2W的音頻功率放大器與數(shù)字音量控制和輸入復(fù)用器
文件頁數(shù)： 14/19頁
文件大?。?/td> 786K
代理商： LM4840
Application Information
(Continued)
Table 1: Logic Level Truth Table
SD
BEEP
DETECT
L
L
L
L
MUTE
HP
SENSE
L
H
L
H
MODE
R-
R+
L-
L+
L
L
L
L
L
L
H
H
BTL SPK
HP
BTLSPK
HP
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
OFF
ON
OFF
ON (buffer)
ON
ON (buffer)
*Amps are muted
*Amps are muted
*Next four conditions, beep is detected; beep signal added to audio signal and bypasses volume control (unity)
L
H
L
L
BTL SPK
L
H
L
H
HP
L
H
H
L
BTL SPK
L
H
H
H
HP
*Next eight conditions turns off all amps
H
L
L
L
BTL SPK
H
L
L
H
HP
H
L
H
L
BTL SPK
H
L
H
H
HP
H
H
L
L
BTL SPK
H
H
L
H
HP
H
H
H
L
BTL SPK
H
H
H
H
HP
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON (buffer)
ON
ON (buffer)
*Dual Mode
*Dual Mode
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
*Beepdetect signal overrides any mute. For example, if amp is muted and bpdetect is HIGH, then amp is no longer muted.
**Dual mode: When HP jack is inserted, load A (speaker corresponding to outputs A- and A+) is physically disconnected. Load
B remains connected; however, amp B+ is off and differentially there is no voltage across it. If a beep is detected (i.e. beepdetect
= HIGH), then summed signal (audio + beep signals) is heard in the headphones and on speaker B.
L
www.national.com
14
相關(guān)PDF資料
PDF描述
LM4840LQ Stereo 2W Audio Power Amplifiers with Digital Volume Control and Input Mux
LM4840MH Stereo 2W Audio Power Amplifiers with Digital Volume Control and Input Mux
LM4840MT Stereo 2W Audio Power Amplifiers with Digital Volume Control and Input Mux
LM4841 Stereo 2W Amplifiers with DC Volume Control, Transient Free Outputs, and Cap-less Headphone Drive
LM4841LQ Stereo 2W Amplifiers with DC Volume Control, Transient Free Outputs, and Cap-less Headphone Drive
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM4840LQ 制造商:Texas Instruments 功能描述:AMP AUDIO POWER DC VOLT LLP-28
LM4840LQ/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(chǎn)品培訓(xùn)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(fēng)，靜音，短路保護，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)
LM4840MH 制造商:Texas Instruments 功能描述:AMP AUDIO STEREO 2W SMD TSSOP28
LM4840MH/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(fēng)，靜音，短路保護，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)
LM4840MT 制造商:Texas Instruments 功能描述:AMP AUDIO STEREO 2W SMD TSSOP28
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