參數(shù)資料
型號(hào)： S6B0721X11-xxXN
廠商： SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述： 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD
中文描述： 132賽格/ 65 COM驅(qū)動(dòng)程序
文件頁數(shù)： 29/67頁
文件大小： 901K
代理商： S6B0721X11-XXXN
S6B0721 PRELIMINARY SPEC. VER. 0.1 132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD
25
Voltage Regulator Circuits
The function of the internal Voltage Regulator circuits is to determine liquid crystal operating voltage, V0, by
adjusting resistors, Ra and Rb, within the range of |V0| < |VOUT|. Because VOUT is the operating voltage of
operational-amplifier circuits shown in figure 16, it is necessary to be applied internally or externally.
For the Eq. 1, we determine V0 by Ra, Rb and V
EV
. The Ra and Rb are connected internally or externally by
INTRS pin. And V
EV
called the voltage of electronic volume is determined by Eq. 2, where the parameter
α
is the
value selected by instruction, "Set Reference Voltage Register", within the range 0 to 63. V
REF
voltage at Ta =
25
°
C is shown in table 14-1.
Rb
V0 = ( 1 +
) x V
EV
[V] ------ (Eq. 1)
Ra
(63 -
α
)
V
EV
= ( 1 -
) x V
REF
[V] ------ (Eq. 2)
300
Table 14-1. V
REF
Voltage at Ta = 25
°
C
TEMPS
Temp. coefficient
-0.05% /
°
C
-0.2% /
°
C
V
REF
[V]
L
2.0
H
2.0
Table 14-2. Reference Voltage Parameters (
α
)
SV5
SV4
SV3
SV2
SV1
SV0
Reference voltage parameter (
α
)
0
1
:
:
62
63
0
0
:
:
1
1
0
0
:
:
1
1
0
0
:
:
1
1
0
0
:
:
1
1
0
0
:
:
1
1
0
1
:
:
0
1
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