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參數(shù)資料
| 型號： | BUF11702PWP |
| 文件頁數(shù)： | 15/28頁 |
| 文件大?。?/td> | 501K |
| 代理商： | BUF11702PWP |
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BUF11702
10+1-CHANNEL LCD GAMMA CORRECTION BUFFER
SLOS359B
–
MARCH 2001
–
REVISED OCTOBER 2001
15
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
The BUF11702 was designed to buffer the gamma correction reference voltages supplied to the
digital-to-analog converters (DACs) within the LCD source
drivers and provide the voltage/current requirements
for LCD panel common node (V
COM
). See Figure 44.
BUF11702
VCOM Buffer
Gamma Correction
Buffer 1
–
10
Reference
Panel
Timing
Controller
Timing and
Control
T
T
Start Pulse
TMS57569
OUT001
OUT256
OUT001
OUT256
1024
×
768
or
1280
×
1024
TFT-LCD Panel
TMS57569
OUT001
OUT384
OUT001
OUT384
10
10
VCOM
Figure 44. LCD Panel Drive Block Diagram
Depending on the size of the display, the BUF11702 will have to drive the gamma correction voltage inputs of a
different number of LCD source drivers. A typical LCD source driver available from TI is the TMS57569.
A 64 gray scale LCD source driver employs internal DACs to convert a 6-bit digital word into a corresponding
analog voltage. A 64 gray scale LCD source driver typically has 10 reference nodes to allow for external gamma
voltage correction. Gamma voltage correction is used to match the characteristic of the LCD source driver chip
as close as possible to the characteristic of the actual LCD panel to improve the overall picture quality. External
gamma correction voltages are often generated using a simple resistor ladder, as shown in Figure 45. The
BUF11702 acts as a buffer for the various nodes on the gamma correction resistor ladder. Due to the low output
impedance of the BUF11702 it forces the external gamma correction voltage on the respective reference node
of the LCD source driver providing an accurate match between the source driver and the LCD panel.
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PDF描述 |
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| BUF11705AIPWPR | 22 - V Supply, 10 + 1 Channel Gamma Correction Buffer |
| BUF12800 | REFERENCE VOLTAGE GENERATOR for LCD GAMMA CORRECTION |
| BUF12800AIPWP | REFERENCE VOLTAGE GENERATOR for LCD GAMMA CORRECTION |
| BUF12800AIPWPR | REFERENCE VOLTAGE GENERATOR for LCD GAMMA CORRECTION |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| BUF11702PWPG4 | 功能描述:LCD Gamma緩沖器 10+1 Ch Hi Current Buffer RoHS:否 制造商:Maxim Integrated 輸入補償電壓: 轉換速度: 電源電壓-最大:20 V 電源電壓-最小:9 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-38 封裝:Tube |
| BUF11702PWPR | 功能描述:LCD Gamma緩沖器 10+1 Channel High Current Buffer RoHS:否 制造商:Maxim Integrated 輸入補償電壓: 轉換速度: 電源電壓-最大:20 V 電源電壓-最小:9 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-38 封裝:Tube |
| BUF11702PWPRG4 | 功能描述:LCD Gamma緩沖器 10+1 Channel High Current Buffer RoHS:否 制造商:Maxim Integrated 輸入補償電壓: 轉換速度: 電源電壓-最大:20 V 電源電壓-最小:9 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-38 封裝:Tube |
| BUF11704 | 制造商:BB 制造商全稱:BB 功能描述:18 - V SUPPLY MULTI - CHANNER GAMMA CORRECTION BUFFER |
| BUF11704AIPWP | 功能描述:LCD Gamma緩沖器 18-V Supply Multi-Ch Correction RoHS:否 制造商:Maxim Integrated 輸入補償電壓: 轉換速度: 電源電壓-最大:20 V 電源電壓-最小:9 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-38 封裝:Tube |
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