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參數(shù)資料
| 型號： | S1D15G10D08B000 |
| 廠商： | 愛普生（中國）有限公司 |
| 英文描述： | LCD drivers equipped with the liquid crystal drive power circuit |
| 中文描述： | 與液晶驅(qū)動電源電路配備LCD驅(qū)動器 |
| 文件頁數(shù)： | 31/64頁 |
| 文件大?。?/td> | 434K |
| 代理商： | S1D15G10D08B000 |
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S1D15G10D08B000
28
EPSON
Rev. 1.0
8.11.5 Voltage Divider/Voltage Follower Circuit
The voltage divider/voltage follower circuit V
1
output from the voltage regulator circuit and then generates liquid
crystal drive voltages V
C
using the operational amplifier-featured voltage follower.
Capacitors may be required for voltage regulation between the GND and each of V
C
pin due to the load of LCD panel.
Insert the capacitors, if necessary, by observing the voltage waveforms and current consumption.
The following theoretical equation is the potential relationship.
When the capacitor C is connected between CAP2+ and CAP2– and between V
2
and GND, the primary booster boosts
the voltage from V
1
and MV
1
and generates V
2
.
V
C
= 2/3
×
V
1
MV
1
= 1/3
×
V
1
V
2
= 4/3
×
V
1
Table 8.11.5 Parameters and V
REG
Temperature Gradient
Temperature gradient (%/
°
C)
0
0
–
0.05
0
1
–
0.1
1
0
–
0.15
1
1
–
0.2
The electronic volume control circuit varies
α
in Equation A-1 according to parameters 1(P1) of electronic volum
control command. Table 8.11.6 lists relation between the parameters and
α
.
Parameter
Table 8.11.6 Parameters and Electronic Volume
Parameter
P15
P14
P13
P12
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
α
V
1
voltage value
P11
0
0
1
P10
0
1
0
63
62
61
2
1
0
Small
0
1
1
1
0
1
Large
8.11.6 Secondary Booster Circuit / Step-Down Circuit
The secondary booster/step-down circuit boosts or steps down based on V
2
, GND and produces V
3
and MV
3
.
Their potential relationship is expressed with the following theoretical equation:
V
3
= 2
×
V
2
MV
3
= –V
2
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