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BUF04701 数据表(PDF) 16 Page - Texas Instruments

部件名 BUF04701
功能描述  Multi-Channel LCD Gamma Correction Buffer
PDF  30 Pages
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制造商  TI2 [Texas Instruments]
网页  https://www.ti.com
标志 TI2 - Texas Instruments

BUF04701 数据表(HTML) 16 Page - Texas Instruments

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140
120
100
80
60
40
20
0
10
100
1000
LoadCapacitance,C (pF)
L
BUF07703:Channels1to6
BUF06703:Channels1to6
BUF05703:Channels1to4
V
=10V
R =2kW
DD
L
BUF07703
SourceDriver
GMA1
2
3
4
5
GMA6
GMA6
OUT2
OUT3
OUT4
OUT5
OUT6
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT1
V
COM
V
COM
8
9
10
11
GMA12
BUF06703
BUF07703
BUF06703
BUF05703
SBOS269C – MARCH 2003 – REVISED APRIL 2010
www.ti.com
space
Figure 38. Phase Shift Between Output and Input
vs Load Capacitance for the Gamma Buffers
APPLICATIONS WITH >10 GAMMA
CHANNELS
When
a
greater
number
of
gamma
correction
channels are required, two or more BUFxx703
devices can be used in parallel, as shown in
Figure 39. This provides a cost-effective way of
creating more reference voltages over the use of
quad-channel op amps or buffers. The suggested
configuration in Figure 39 simplifies layout. The
Figure 39. Creating > 10 Gamma Voltage
various different channel versions provide a high
Channels
degree of flexibility and also minimize total cost and
space. Table 1 lists a variety of gamma combinations
for applications with more than 10 channels.
MULTIPLE VCOM CHANNELS
Table 1. > 10 Channel Gamma Combinations
In some LCD panels, more than one VCOM driver is
required for best panel performance. Figure 40 uses
BUF11702
BUF07703
BUF06703
BUF05703
three
BUF07703s
to
create
a
total
of
18
12ch
—
—
2
—
gamma-correction and three VCOM channels. This
12ch + VCOM
—
1
1
—
solution saves considerable space and cost over the
14ch + VCOM
1
—
—
1
more conventional approach of using five or six
16ch + VCOM
1
—
1
—
quad-channel buffers or op amps.
18ch + VCOM
2
—
—
—
20ch + VCOM
2
—
—
—
16
Copyright © 2003–2010, Texas Instruments Incorporated
Product Folder Link(s): BUF07703 BUF06703 BUF05703



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