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參數(shù)資料
| 型號： | BUF20820AIDCPR |
| 廠商： | Texas Instruments |
| 文件頁數(shù)： | 10/29頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC 18CH PROG V-REF GEN 38-HTSSOP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 應(yīng)用： | TFT-LCD 面板：伽瑪緩沖器，VCOM 驅(qū)動器 |
| 輸出類型： | 滿擺幅 |
| 電路數(shù)： | 18 |
| 電流 - 電源： | 18mA |
| 電流 - 輸出 / 通道： | 100mA |
| 電壓 - 電源，單路/雙路(±)： | 7 V ~ 18 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 38-TFSOP （0.173"，4.40mm 寬）裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 38-HTSSOP |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 其它名稱： | 296-19400-6 |
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BUF20820
SBOS330E DECEMBER 2005 REVISED OCTOBER 2008
www.ti.com
18
CONFIGURATION FOR 22 GAMMA CHANNELS
In addition to the VCOM outputs, the REFH and REFL OUT
outputs can also be used as fixed gamma references. The
output voltage will be set by the REFH and REFL input
voltages, respectively. Therefore, REFH OUT should be
used for the highest voltage gamma reference, and REFL
OUT for the lowest voltage gamma reference. A
22-channel solution can be created by using all 18 outputs,
the two VCOM outputs, and both REFH/L OUT outputs for
gamma references—see Figure 17. However, the REFH
and REFL OUT buffers were designed to only drive light
loads on the order of 510mA. Driving capacitive loads is
not recommended with these buffers. In addition, the
REFH and REFL buffers must not be allowed to saturate
from sourcing/sinking too much current from REFH OUT
or REFL OUT. Saturation of the REFH and REFL buffers
results in errors in the voltages of OUT118, VCOM OUT1,
and VCOM OUT2. The BUF01900 can be used to provide a
programmable VCOM output.
SDA
SCL
LD
A0
Analog
Digital
REFH
OUT17
V
COM OUT1
REFL
DA
C
R
e
g
is
te
rs
2
Control IF
OUT18
OUT1
OUT2
REFH OUT
REFL OUT
DA
C
R
e
g
is
te
rs
1
OTP
M
e
m
o
ry
P
rogr
am
C
o
mman
d
14.8V
0.2V
15V
2V5.5V
15V
0.2V
14.8V
GMA 3
GMA 4
GMA 19
GMA 20
V
COM OUT2
GMA 1
GMA 2
2V
COM Channels plus
18 Gamma Channels
Source
Driver
BUF20820
Figure 16. 20-Gamma Channel Solution—2 VCOM Channels Used as Additional Gamma Channels
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| BUF20820AIDCPRE4 | 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 |
| BUF20820EVM | 功能描述:放大器 IC 開發(fā)工具 BUF20800-BUF20820 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 |
| BUF22821 | 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 |
| BUF22821AIDCPR | 功能描述:LCD Gamma緩沖器 Prgrmbl Gam-Vltg Gen & Vcom Calibrator 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(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-38 封裝:Tube |
| BUF22821EVM | 功能描述:放大器 IC 開發(fā)工具 BUF22821EVM 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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