S1D12200 Epson Electronics America, Inc., S1D12200 Datasheet - Page 203

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

Boosting circuit
The S1D12400 series is provided with a boosting circuit
for triple boosting and double boosting for the potential
between V
For triple boosting, connect a capacitor between CAP1+
and CAP1–, between CAP2+ and CAP2–, and between
V
boosted to the negative side and output to the V
For double boosting, connect a capacitor between CAP1+
and CAP1– and between V
OPEN, and connect CAP2– to V
Rev. 2.1
* Set the V
DD
voltage range of V
V
and V
SS2
Potential relation of triple boosting voltages
V
DD
.
= –3V
DD
.
OUT
= 0V
V
SS2
OUT
and V
, and the V
voltage range to ensure that V
.
= 3V
.
SS2
SS
SS2
.
- V
= –9V
DD
DD
OUT
- V
and V
OUT
V
V
CAP2–
CAP2+
CAP1–
CAP1+
and absolute maximum rating.
SS2
DD
OUT
, and the V
OUT
potential is triple-
, set CAP2+ to
DD
OUT
OUT
- V
terminal voltage does not exceed the permissible operating
pin.
SS2
EPSON
potential is double-boosted to the negative side and
output to the V
Because the boosting circuit uses signals from the
oscillator output, the internal oscillating circuit or the
external clock must be in operation.
The relation of boosting voltages is shown below.
Set the potential between the V
the V
voltage range of V
boosted.
V
SS2
V
Potential relation of double boosting voltages
DD
OUT
.
= –3V
.
= 0V
V
OUT
OPEN
does not exceed the permissible operating
= 2V
OUT
SS
SS2
pin.
V
V
CAP2–
CAP2+
CAP1–
CAP1+
- V
DD
OUT
.
= –6V
.
OUT
(V
DD
5
) when double or triple
S1D12400 Series
and V
SS2
to ensure that
6–15