參數(shù)資料
型號: LM4838ITL/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): 36/38頁
文件大小: 2351K
代理商: LM4838ITL/NOPB
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 VDD 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.
Note 17: All bumps have the same thermal resistance and contribute equally when used to lower thermal resistance. The LM4838GR Demo Board is a four layer
PC Board with 2 inner layers. The second inner layer and bottom outside layers are both grounded. The planes measure 3200 x 3700 mills and aid in spreading
heat due to power dissipation within the IC.
Typical Application
Truth Table for Logic Inputs (Note 18)
Gain
Sel
Mode
Headphone
Sense
Mute
Shutdown Output Stage Set To
DC Volume
Output Stage
Configuration
0
Internal Gain
Fixed
BTL
0
1
0
Internal Gain
Fixed
SE
0
1
0
Internal Gain
Adjustable
BTL
0
1
0
Internal Gain
Adjustable
SE
1
0
External Gain
Fixed
BTL
1
0
1
0
External Gain
Fixed
SE
1
0
External Gain
Adjustable
BTL
1
0
External Gain
Adjustable
SE
X
1
0
Muted
X
Muted
X
1
Shutdown
X
Note 18: 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 )
LM4838
www.national.com
7
相關PDF資料
PDF描述
LM4838ITLX/NOPB 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PBGA36
LM4838LQ/NOPB 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, QCC28
LM4838LQX/NOPB 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, QCC28
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LM4839MTEX/NOPB 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28
相關代理商/技術參數(shù)
參數(shù)描述
LM4838ITLX 制造商:Rochester Electronics LLC 功能描述:- Bulk
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(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(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