參數(shù)資料
型號: LM4838LQ
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 音頻控制
英文描述: Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable Gain
中文描述: 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, QCC28
封裝: LLP-28
文件頁數(shù): 6/36頁
文件大小: 2085K
代理商: LM4838LQ
Electrical Characteristics for Bridged Mode Operation
(Notes 7, 10) (Continued)
Note 16:
All bumps have the same thermal resistance and contribute equally when used to lower thermal resistance. The LM4838ITL demo board (views featured
in the
Application Information
section) is a four layer board with two inner layers. The second inner layer is a V
DD
plane with the bottom outside layer a GND plane.
The planes measure 1,900mils x 1,750mils (48.26mm x 44.45mm) and aid in spreading heat due to power dissipation within the IC.
Typical Application
Truth Table for Logic Inputs
(Note 17)
Gain
Sel
0
0
0
0
1
1
1
1
X
X
Mode
Headphone
Sense
0
1
0
1
0
1
0
1
X
X
Mute
Shutdown Output Stage Set To
DC Volume
Output Stage
Configuration
BTL
SE
BTL
SE
BTL
SE
BTL
SE
Muted
X
0
0
1
1
0
0
1
1
X
X
0
0
0
0
0
0
0
0
1
X
0
0
0
0
0
0
0
0
0
1
Internal Gain
Internal Gain
Internal Gain
Internal Gain
External Gain
External Gain
External Gain
External Gain
Muted
Shutdown
Fixed
Fixed
Adjustable
Adjustable
Fixed
Fixed
Adjustable
Adjustable
X
X
Note 17:
If system beep is detected on the Beep In pin, the system beep will be passed through the bridged amplifier regardless of the logic of the Mute and HP
sense pins.
20013303
FIGURE 2. Typical Application Circuit ( LQ Package Pinout )
L
www.national.com
6
相關(guān)PDF資料
PDF描述
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
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參數(shù)描述
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(chǎn)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(yīng)商設(shè)備封裝:25-WLP(2.09x2.09) 封裝/外殼:25-WFBGA,WLCSP 包裝:帶卷 (TR)
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LM4838MT 制造商:Texas Instruments 功能描述:AMP AUDIO STEREO 2W SMD TSSOP28
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LM4838MTE 制造商:Texas Instruments 功能描述:AMP AUDIO STEREO 2.2W SMD TSSOP28