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參數(shù)資料
| 型號(hào)： | BUF08800 |
| 英文描述： | Programmable Reference Generator and 400mA VCOM Driver |
| 中文描述： | 可編程參考發(fā)電機(jī)驅(qū)動(dòng)器和400mA威科姆 |
| 文件頁(yè)數(shù)： | 14/23頁(yè) |
| 文件大小： | 627K |
| 代理商： | BUF08800 |
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SBOS380A FEBRUARY 2007 REVISED MAY 2007
www.ti.com
14
DIGITAL GATE-VOLTAGE (V
GH
, V
GL
)
ADJUSTMENT
Different panel sizes and manufacturing technology often
require different gate-high (V
GH
) and gate-low (V
GL
)
voltages. Optimizing the gate-high and -low voltages for
best panel performance can be time consuming. Using
channels 7 and 8, which are capable of swinging close to
GND, allows a wide range of programmable adjustment of
both V
GL
and V
GH
. This procedure of optimizing V
GH
and
V
GL
is greatly simplified and the LCD power-supply
solution can readily be used in other panels without
modification to the hardware.
TYPICAL APPLICATIONS FOR BUF08800
1.
All eight channels are used for gamma correction.
The V
COM
channel swings very close to V
S
. It can
therefore be used to generate the highest gamma
voltage. V
COM
(OUT 1) together with OUT 2 and
OUT 3 would then form the four upper gamma
references and OUT 4 through OUT 8 would be used
for the four lower gamma references.
Five-channel gamma reference, two-channel gate
voltage adjust, one-channel V
COM
.
For applications
that can accept a total of five gamma references, the
BUF08800 can be used to digitally adjust the gate
voltages. Two channels would be used to adjust V
GH
and V
GL
. In this case, the suggested use of channels
would be to use OUT 2 through OUT 6 for generating
the gamma references and OUT 7 and OUT 8 for
generating the V
GH
and V
GL
references. OUT 1 would
be used as the V
COM
channel.
Six-channel gamma, one V
COM
channel.
For
applications requiring one V
COM
channel and an even
number of gamma channels, the BUF08800 would
still be a very cost-competitive solution. Channels 2
through 7 would be used to generate the gamma
references.
2.
3.
V
S
BUF08800
V
SD
A0
SCL
SDA
OUT 8
OUT 7
V
G
A
V
G
A
Control IF
…
…
…
10Bit
DAC
10Bit
DAC
10Bit
DAC
D
R
V
GH
= V
DIODE
+ OUT 8
V
BE
(NPN)
36V Unregulated
V
GATE
High
D
R
V
GH
= V
DIODE
+ OUT 7
V
BE
(NPN)
Unregulated
V
GATE
Low
Programmable
V
GATE
High
Programmable
V
GATE
Low
Figure 18. Using the BUF08800 to Digitally Adjust the V
GH
Voltage
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| BUF11702PWP | |
| BUF11705 | 22 - V Supply, 10 + 1 Channel Gamma Correction Buffer |
| 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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BUF08800AIPWPR | 功能描述:LCD Gamma緩沖器 Progr Ref Gen & 400mA Vcom Driver 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 |
| BUF08800AIPWPRG4 | 功能描述:LCD Gamma緩沖器 Progr Ref Gen & 400mA Vcom Driver 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 |
| BUF08821 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Programmable Gamma-Voltage Generator and VCOM Calibrator with Integrated Two-Bank Memory |
| BUF08821A | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Programmable Gamma-Voltage Generator and VCOM Calibrator with Integrated Two-Bank Memory |
| BUF08821AIPWPR | 功能描述:LCD Gamma緩沖器 8 channel LCD Gamma Buffer 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 |
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