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S6B1713A15-B0CZ Datasheet

  • S6B1713A15-B0CZ

  • 65 COM / 132 SEG DRIVER & CONTROLLER FOR STN LCD

  • 417.73KB

  • 70页

  • SAMSUNG   SAMSUNG

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65 COM / 132 SEG DRIVER & CONTROLLER FOR STN LCD
S6B1713
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 20, 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
伪
is the value
selected by instruction, "Set Reference Voltage Register", within the range 0 to 63. V
REF
voltage at Ta = 25掳C is
shown in table 14-1.
Rb
V0 = ( 1 +
铮э＇铮э＇
) x V
EV
[V] ------ (Eq. 1)
Ra
(63 -
伪)
V
EV
= ( 1 -
铮э＇铮э＇铮э＇
) x V
REF
[V] ------ (Eq. 2)
300
Table 14-1. V
REF
Voltage at Ta = 25
掳C
TEMPS
L
H
Temp. coefficient
-0.05% /
掳C
-0.2% /
掳C
Table 14-2. Reference Voltage Parameters (伪)
SV5
0
0
:
:
1
1
SV4
0
0
:
:
1
1
SV3
0
0
:
:
1
1
SV2
0
0
:
:
1
1
SV1
0
0
:
:
1
1
SV0
0
1
:
:
0
1
Reference voltage parameter (伪)
0
1
:
:
62
63
V
REF
[V]
2.0
2.0
26

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