S1D15605D11B Epson Company, S1D15605D11B Datasheet - Page 45
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S1D15605D11B
Manufacturer Part Number
S1D15605D11B
Description
Single-chip dot matrix liquid crystal display drivers
Manufacturer
Epson Company
Datasheet
1.S1D15605D11B.pdf
(87 pages)
- Current page: 45 of 87
- Download datasheet (564Kb)
(C) When External Resistors are Used
When the external resistor described above are used,
adding a variable resistor as well makes it possible to
perform fine adjustments on Ra’ and Rb’, to set the
liquid crystal drive voltage V
Setup example: When selecting Ta = 25 C and V
5 to –9 V (using R2) for an S1D15607 model where the
temperature gradient = –0.05%/ C.
When the central value for the electronic volume register
is set at (D5, D4, D3, D2, D1, D0) = (1, 0, 0, 0, 0, 0),
so, according to equation C-1, when R
to make V
Rev. 2.4a
(i.e. The V
Resistors Are Not Used). (2)
V
9
REG
V
V
Variable Range
Notch width
5
5
1
= –9 V,
31
2 1
.
R
5
V
3
V
Voltage Regulator Internal
R
5
Ra'
Rb'
1
R
Q
2
V
1
1
EV
1
R
R
External
resistor R
External
resistor R
External
resistor R
3
3
R
R
5
1
162
. In this case, the use of
1
1
Min.
–8.7 (63 levels)
31
R
R
2
2
162
R
R
2
2
1
2
3
R
R
2 1
2
2
2
(Equation C-2)
.
V
= 0 , in order
REG
V
1
EV
V
–
R
R
162
2
5
= –
V
Figure 21
V
Table 15
EPSON
REG
Typ.
–7.0 (central value) –5.3 (0 level)
53
EV
+
–
(fixed voltage supply + electronic volume)
the electronic volume function makes it possible to
control the liquid crystal power supply voltage V
commands to adjust the liquid crystal display brightness.
In the range where | V
be calculated by equation C-1 below based on the R
and R
be subjected to fine adjustments ( R
(Equation C-1)
When
Moreover, when the current flowing V
to 5 A,
With this, according to equation C-2, C-3 and C-4,
At this time, the V
width based on the electron volume function is as shown
in Table 15.
R
R
R
R
1
1
2
5
2
3
V
(variable resistor) and R
R
R
264
211
925
2
2
1
= R
k
k
k
R
3
Max.
2
R
, in order to make V = –5 V,
1
R
1 4 .
5
3
R
voltage variable range and notch
2
M
5
| < | V
1
V
V
DD
5
162
OUT
31
3
S1D15605 Series
settings, where R
| the V
2
2 1
DD
Units
[V]
).
[mV]
(Equation C-3)
(Equation C-4)
.
5
and V
voltage can
5
8–43
is set
2
5
can
by
1
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