S1D12200 Epson Electronics America, Inc., S1D12200 Datasheet - Page 122
![no-image](/images/no-image-200.jpg)
S1D12200
Manufacturer Part Number
S1D12200
Description
S1d12000 Series Lcd Driver Ic Technical Manual Technical Manual
Manufacturer
Epson Electronics America, Inc.
Datasheet
1.S1D12200.pdf
(260 pages)
- Current page: 122 of 260
- Download datasheet (4Mb)
S1D12300 Series
Triple boosting circuit
When a capacitor is connected between CAP1+ and
CAP1-, between CAP2+ and CAP2-, and between V
pin and V
V
V
capacitor between CAP2+ and CAP2- in connection for
triple boosting operation and strap between CAP2- and
Voltage regulating circuit
The voltage regulation circuit regulates the boosted
voltage developed at Vout. It outputs the regulated LCD
driving voltage at the V
can be inserted into the regulation circuit feedback loop
providing the following voltage levels at the V
When V
leave the internal feedback resistor out of the circuit. V
can be regulated within a range of |V
calculated by the following formula:
Wherein, V
S1D12300 Series and the voltage is constant at V
3.1V. The voltage regulation V
option 1, and V
of the V
able resistor between V
ment of the V
resistors R1 and R3 and a variable resistor R2.
Example 1:
(V
4–18
DD
OUT
CC
Condition: I(R1, R2, R3)
Setting:
(GND) V
pin and V
=+3V) V
pin. In case of double boosting, remove the
V
5
5
OUT
5
is required to be different than the above case,
output is accomplished by connecting a vari-
Potential during double boosting
= (1 + R
REG
SS
pin respectively, the potential between the
DD
REG
SS
5
R1+R2+R3 = 8V/5 A = 1.6M
8V = (1+R
6V = (1+R
is the constant voltage source inside the
=-3V
voltage, use a combination of fixed
=0V
pin is boosted triple and output to the
V
R
= V
OUT
b
a
) • V
SS
R
5
=2V
, V
in option 2. Voltage regulation
terminal. An internal resistor
REG
b
b
DD
/R
/R
SS
a
a
..............................
) 3.0V R
) 3.0V R
and V
=-6V
5 A
REG
5
|<|V
5
=
. For fine adjust-
V
2.1V (TYP.) in
OUT
b
b
5
/R
/R
= –6 to –8V
|. It may be
a
a
5
= 1.67
= 1
1
terminal.
REG
SS
=
5
EPSON
....
R1 = 600K
R2 = 200K
R3 = 800K
V
from the V
The boosting circuit uses a signal from the oscillator
output.
Accordingly, it is necessary that the oscillating circuit
must be in operation. The potential relationship of
boosting is shown below.
The voltage regulator circuit carries a temperature gradi-
ent of about -0.17%/ C under V
specification), about -0.04%/ C (option). When any other
temperature gradient is required, connect a thermistor in
series to the output voltage regulating register.
Since the V
necessary to take noise suppression measures such as
shortening the input wiring and shielding the wiring run.
OUT
V
0
pin. Then, a double boosted output can be obtained
OUT
R
R1
R
a
V
V
terminal has a high input impedance, it is
SS
DD
pin (CAP2-).
=-3V
=0V
Potential during triple boosting
V
OUT
V
V
R2
REG
R
=3V
SS
+
-
=-9V
REG
R
R3
b
outputs (standard
V
DD
Rev. 1.9
V
5
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