S1D1 Epson Electronics America, Inc., S1D1 Datasheet - Page 570

• Manufacturer Part Number: S1D1
• Description: LCD Controller-driver With Built-in Character ROM
• Manufacturer: Epson Electronics America, Inc.

Power supply circuit
The power supply circuit generates the voltage to drive
the LCD panel at low power consumption.
The power supply circuit consists of a booster circuit,
voltage regulator circuit, and voltage follower circuit,
and is controlled by Power control set command. Using
this command, the booster circuit, the voltage regulator
circuit, and the voltage follower circuit can be
independently turned ON or OFF. In the case of using
Table 6
*1 Combinations other than those shown in above table are possible but impractical.
*2 Chose the appropriate product according to the power supply condition.
*3 The boosting system pin indicates the CAP+, CAP1–, CAP2+, CAP2–, CAP3+, and CAP4+ pin.
*4 Both V
Booster circuit
Using the booster circuit, it is possible to produce
Quintuple/Quadruple/Triple/Double boosting of the
V
Quintuple boosting :
Connect capacitor between CAP1+ and CAP1–, between
CAP2+ and CAP2–, between CAP3+ and CAP1–,
between CAP4+ and CAP2–, between V
the potential between V
quintuple toward the positive side and it is output at
V
Quadruple boosting :
Connect capacitor between CAP1+ and CAP1–, between
CAP2+ and CAP2–, between CAP3+ and CAP1–,
between V
and V
Rev. 1.1a
DD2
OUT
follower circuit only
circuit and Voltage
Voltage regulator
Voltage follower
External power
Power supply
On-chip power
-V
pin.
OUT
supply used
supply only
circuit only
condition
SS
0
OUT
, the potential between V
voltage level.
pin and V
and V
DD2
OUT
, and jumper between CAP4+
DD2
pin should be connected to external power supply.
S1D15B01D00B
S1D15B01D01B
S1D15B01D01B
S1D15B01D02B
Product name*
and V
SS
DD2
OUT
is boosted to
and V
and V
2
*
*
*
*
SS
DD2
Booster Voltage
circuit regulator follower
is
EPSON
,
OFF
OFF
OFF
ON
S1D15B01D00B
regulator circuit, and voltage follower circuit, every
circuit is required to be turnend ON or OFF at the same
time by Power control set command. In the case of
using S1D15B01D00B
the external power supply and use part of on-chip power
supply circuit, each must be set the appropriate state as
shown in the Table 6.
boosted to quadruple toward the positive side and it is
output at V
Triple boosting :
Connect capacitor between CAP1+ and CAP1–, between
CAP2+ and CAP2–, between V
jumper between CAP3+, CAP4+ and V
boosted voltage appears at V
Double boosting :
Connect capacitor between CAP1+ and CAP1–, between
V
CAP2+, CAP3+, CAP4+ and V
voltage appears at V
The boosted voltage relationships are shown in Figure
8.
OUT
circuit
OFF
OFF
ON
ON
and V
OUT
Voltage
DD2
circuit
OFF
ON
ON
ON
pin.
, open CAP2–, and jumper between
*
which use a booster circuit, voltage
OUT
*
/S1D15B01D02B
V
V
pin.
External
voltage
V
0
0
=V
=V
input
V
V
1
OUT
OUT
DD2
to V
OUT
OUT
OUT
S1D15B01 Series
pin.
OUT
4
, the double boosted
*
*
4
4
and V
system pin*
OUT
Boosting
*
which need
Open
Open
Open
Used
, the triple
DD2
13–15
, and
3