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參數(shù)資料
| 型號(hào)： | BUF20800 |
| 英文描述： | 18-Channel GAMMA VOLTAGE GENERATOR with Two Programmable VCOM Channels |
| 中文描述： | 18通道伽瑪雙通道可編程的VCOM電壓發(fā)生器 |
| 文件頁數(shù)： | 13/27頁 |
| 文件大小： | 765K |
| 代理商： | BUF20800 |
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SBOS329D JUNE 2005 REVISED OCTOBER 2006
www.ti.com
13
REPLACEMENT OF TRADITIONAL GAMMA
BUFFER
Traditional gamma buffers rely on a resistor string (often
using expensive 0.1% resistors) to set the gamma
voltages. During development, the optimization of these
gamma voltages can be time-consuming. Programming
these gamma voltages with the BUF20800 can
significantly reduce the time required for gamma voltage
optimization. The final gamma values can be written into
an external EEPROM to replace a traditional gamma
buffer solution. During power-up of the LCD panel, the
timing controller reads the EEPROM and loads the values
into the BUF20800 to generate the desired gamma
voltages. Figure 11a shows the traditional resistor string;
Figure 11b shows the more efficient alternative method
using the BUF20800.
BUF20800 uses the most advanced high-voltage CMOS
process available today, which allows it to be competitive
with traditional gamma buffers.
This technique offers significant advantages:
It shortens development time significantly.
It allows demonstration of various gamma curves to
LCD monitor makers by simply uploading a different
set of gamma values.
It allows simple adjustment of gamma curves during
production to accommodate changes in the panel
manufacturing process or end-customer require-
ments.
It decreases cost and space.
BUFxx704
a) Traditional
b)
BUF20800
Solution
PC
SDA
SCL
SDA
SCL
EEPROM
Timing
Controller
LCD Panel Electronics
BUF20800
R
Control Interface
Gamma
References
OUT1
OUT2
OUT17
OUT18
V
COM
V
COM OUT1
V
COM OUT2
Figure 11. Replacement of the Traditional Gamma Buffer
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| BUF20800AIDCPR | 18-Channel GAMMA VOLTAGE GENERATOR with Two Programmable VCOM Channels |
| BUF20820 | 18-Channel GAMMA VOLTAGE GENERATOR with Two Programmable VCOM Channels |
| BUF20820AIDCPR | 18-Channel GAMMA VOLTAGE GENERATOR with Two Programmable VCOM Channels |
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| BUF298AF | TRANSISTOR | BJT POWER MODULE | INDEPENDENT | 450V V(BR)CEO | 50A I(C) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BUF20800AIDCPR | 功能描述:LCD Gamma緩沖器 18-Ch Vltg Generator w/2 Prog VCOM Chs RoHS:否 制造商:Maxim Integrated 輸入補(bǔ)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-38 封裝:Tube |
| BUF20800AIDCPRE4 | 功能描述:LCD Gamma緩沖器 18-Ch Vltg Generator w/2 Prog VCOM Chs RoHS:否 制造商:Maxim Integrated 輸入補(bǔ)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-38 封裝:Tube |
| BUF20800ATDCPRQ1 | 功能描述:LCD Gamma緩沖器 AUTO CAT 18CH GAMMA VLTG GEN RoHS:否 制造商:Maxim Integrated 輸入補(bǔ)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-38 封裝:Tube |
| BUF20800-Q1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:18-CHANNEL GAMMA VOLTAGE GENERATOR WITH TWO PROGRAMMABLE VCOM CHANNELS |
| BUF20820 | 制造商:BB 制造商全稱:BB 功能描述:18-Channel GAMMA VOLTAGE GENERATOR with Two Programmable VCOM Channels |
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