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參數(shù)資料
| 型號： | BUF12800 |
| 英文描述： | REFERENCE VOLTAGE GENERATOR for LCD GAMMA CORRECTION |
| 中文描述： | 參考電壓發(fā)生器，用于LCD伽瑪校正 |
| 文件頁數(shù)： | 13/20頁 |
| 文件大小： | 282K |
| 代理商： | BUF12800 |
"#$%&''
SBOS315 DECEMBER 2004
www.ti.com
13
PROGRAMMABLE V
COM
Channels AF of the BUF12800 can drive more than
100mA up to 2V to the supply rails (see Figure 5, typical
characteristic
Output Voltage vs Output Current
).
Therefore, any of these channels can be used to drive the
V
COM
node on the LCD panel. To store the gamma and the
V
COM
values, an external EEPROM is required. During
power-up of the LCD panel, the timing controller can then
read the EEPROM and load the values into the BUF12800
to generate the desired gamma voltages as well as V
COM
voltages. Figure 14 shows channels A and B of the
BUF12800 being used for V
COM
voltages.
INDEPENDENTLY PROGRAMMABLE RGB
GAMMA: BUF20800
Some very high resolution LCD screens require the
adjustment of the gamma voltages for each color
(Red—R, Green—G, Blue—B). The BUF20800, available
Q1 ’05, offers 20 programmable gamma channels. By
using 6 channels for each color, 18 channels would be
used in total for adjusting the gamma. In addition to those,
1 or 2 channels could be used to program V
COM
.
TOTAL TI PANEL SOLUTION
In addition to the BUF12800 programmable voltage
reference, TI offers a complete set of ICs for the LCD
panel market, including gamma correction buffers,
source and gate drivers, timing controllers, various
power-supply solutions, and audio power solutions.
Figure 15 shows the total IC solution from TI.
BUF12800
SDA
SCL
R
Control Interface
Gamma
References
Out C
Out D
Out K
Out L
V
COM
Out A
Out B
Figure 14. BUF12800 Used for Programmable
V
COM
2.7 V5 V
3.3 V
n
n
26 V
14 V
15 V
TPS65140
TPS65100
LCD
Supply
TPA3005D2
TPS3008D2
Audio
Speaker
Driver
Logic and
Timing
Controller
HighResolution
TFTLCS Panel
Source Driver
Gamma Correction
Reference
BUF12800
V
COM
G
Figure 15. TI LCD Solution
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| BUF12800AIPWP | REFERENCE VOLTAGE GENERATOR for LCD GAMMA CORRECTION |
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| BUF16820 | 14-Channel GAMMA VOLTAGE GENERATOR with Programmable VCOM Outputs and OTP Memory |
| BUF16820AIDAPR | 14-Channel GAMMA VOLTAGE GENERATOR with Programmable VCOM Outputs and OTP Memory |
| BUF16820AIDAPRG4 | 14-Channel GAMMA VOLTAGE GENERATOR with Programmable VCOM Outputs and OTP Memory |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BUF12800AIPWP | 功能描述:LCD Gamma緩沖器 Ref Vltg Generator for Correction RoHS:否 制造商:Maxim Integrated 輸入補償電壓: 轉(zhuǎn)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 |
| BUF12800AIPWPG4 | 功能描述:LCD Gamma緩沖器 Ref Vltg Generator for Correction RoHS:否 制造商:Maxim Integrated 輸入補償電壓: 轉(zhuǎn)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 |
| BUF12800AIPWPR | 功能描述:LCD Gamma緩沖器 Ref Vltg Generator for Correction RoHS:否 制造商:Maxim Integrated 輸入補償電壓: 轉(zhuǎn)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 |
| BUF12800AIPWPRG4 | 功能描述:LCD Gamma緩沖器 Ref Vltg Generator for Correction RoHS:否 制造商:Maxim Integrated 輸入補償電壓: 轉(zhuǎn)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 |
| BUF12800EVM | 功能描述:放大器 IC 開發(fā)工具 BUF12800 Eval Mod RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓:13 V to 23 V |
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