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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： | 與液晶驅動電源電路配備LCD驅動器 |
| 文件頁數(shù)： | 28/64頁 |
| 文件大小： | 434K |
| 代理商： | S1D15G10D08B000 |
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S1D15G10D08B000
Rev. 1.0
EPSON
25
8.11.2 Voltage Transform Circuit
The charge pump booster circuit and the operational amplifier’s voltage follower generate each potential required to
drive the liquid crystal based on the reference voltage generated by the voltage regulator.
Ground potentials (abbreviated as GND in the following description) of the power circuit in the IC are GND2 and
GND4.
Fig. 8.11.1 illustrates mutual relationship between potentials.
8.11 Liquid Crystal-Drive Power Circuit
The power circuit contained in S1D15G10 generates voltage required to drive liquid crystal. This low power
consumption type power circuit is consisted the voltage regulator, booster circuits (primary, secondary) and voltage
follower. The power circuit is enabled only when the master operation mode is turned on.
The power control circuit turns on or off the voltage regulator, booster circuits, Reference voltage generation circuit
and voltage follower responding to PWRCTR (power control set) command. Thus, function of the external and internal
power supplies can be partly used in parallel.
Table 8.11.1 lists the functions controlled by the 4-bit data - parameter of PWRCTR. Table 8.11.2 shows combinations
of 4 bits (combinations shown in Table 8.11.2 alone are valid).
Table 8.11.1
Item
State
“1”
ON
ON
ON
ON
“0”
OFF
OFF
OFF
OFF
D3 Primary booster circuits control bit
D2 Secondary booster circuit control bit
D1 Reference voltage generation circuit control bit
D0 Voltage adjusting circuit/Voltage follower control bit
Table 8.11.2
Function turned on
D3
1
1
0
D2
1
0
0
D1
1
1
0
D0
External power input pins
1
1
V
3
, MV
3
0
V
3
, V
2
, V
C
, MV
1
, MV
3
1. Entire built-in power circuit is turned on
2. Other than the secondary booster and step-down circuits
3. External power supply alone
–
Fig. 8.11.1 Mutual Relationship between Voltage Transform Circuits
GND
V
DD2
V
CLS
V
2
V
1,
V
C,
MV
1,
generation circuit
V
3
V
2
V
1
V
C
MV
1
MV
2
MV
3
Secondary
boorster circuit
Secondary
boorster circuit
Primary
boorster circuit
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