S1D12200 Epson Electronics America, Inc., S1D12200 Datasheet - Page 164

• Manufacturer Part Number: S1D12200
• Description: S1d12000 Series Lcd Driver Ic Technical Manual Technical Manual
• Manufacturer: Epson Electronics America, Inc.

Liquid crystal voltage generating circuit
The V
that V
crystal drive.
Furthermore, the V
converted by voltage follower and the then supplied to
Reference setting values: C1: 0.1 - 4.7 F
Rev. 2.4
1
5
When an external power regulator is used
(The built-in power regulator is not used)
, V
regulator
potential is resistance-divided inside the IC so
External
When a built-in power supply is used
power
2
, V
R2
C1
3
Under a triple boosting
and V
C2
C1
C2
C1
C1
C1
C1
1
R3
R1
4
, V
potentials are generated for liquid
2
, V
C2: 0.1 F
3
V
CAP1+
CAP1–
CAP2+
CAP2–
V
V
V
V
V
V
V
V
V
V
CAP1+
CAP1–
CAP2+
CAP2–
V
V
V
V
V
V
V
V
V
and V
SS
OUT
5
R
DD
1
2
3
4
5
SS
OUT
5
R
DD
1
2
3
4
5
S1D123
S1D123
, V
, V
0
0
4
are impedance-
**
**
D
D
****
****
We recommend the user to set the optimum values to capacitors C1
and C2 according to the panel size watching the liquid crystal display
and drive waveforms.
EPSON
the liquid crystal drive circuit.
The liquid crystal drive voltage is fixed to 1/5 bias.
As shown in the diagrams below, the capacitor (C2) for
voltage stabilization must be externally connected to the
V
1
to V
R2
External
C1
supply
power
C2
5
The diagram under a double boosting
pins of liquid crystal power pins.
When a built-in power supply is not used
C1
R3
R1
V
CAP1+
CAP1–
CAP2+
CAP2–
V
V
V
V
V
V
V
V
V
V
CAP1+
CAP1–
CAP2+
CAP2–
V
V
V
V
V
V
V
V
V
SS
OUT
5
R
DD
1
2
3
4
5
SS
OUT
5
R
DD
1
2
3
4
5
S1D123
S1D12304/12305 Series
S1D123
, V
0
**
**
D
D
****
****
5–15