參數(shù)資料
型號(hào): LM4838ITL
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, PBGA36
封裝: MICRO, SMD-36
文件頁(yè)數(shù): 6/36頁(yè)
文件大?。?/td> 2085K
代理商: LM4838ITL
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
LM4838ITLX Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable Gain
LM4839 Stereo 2W Audio Power Amplifiers with DC Volume Control, Bass Boost, and Input Mux
LM4839MT Stereo 2W Audio Power Amplifiers with DC Volume Control, Bass Boost, and Input Mux
LM4839LQ Stereo 2W Audio Power Amplifiers with DC Volume Control, Bass Boost, and Input Mux
LM4839MTE Stereo 2W Audio Power Amplifiers with DC Volume Control, Bass Boost, and Input Mux
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