参数资料
型号: SED122ADXA
元件分类: 显示控制器
英文描述: 16 X 60 DOTS DOT MAT LCD DRVR AND DSPL CTLR, UUC165
封装: DIE-165
文件页数: 10/50页
文件大小: 398K
代理商: SED122ADXA
4–18
EPSON
SED1220
Liquid crystal voltage generating circuit
V5 potential is resistive divided within IC to produce V1,
V2, V3 and V4 potentials required for driving the liquid
crystal. V1, V2, V3 and V4 potentials are then subject to
impedance conversion and provided to the liquid crystal
drive circuit.
The liquid crystal drive voltage is fixed to 1/5 (1/4) bias.
The liquid crystal power terminals V1 – V5 must be
externally connected with the voltage regulating capacitor
C2.
When a built-in supply is used
When voltage is doubled
When voltage is tripled
Reference setting values: C1: 0.1 - 4.7
F We recommend the user to set the optimum values to capacitors C1
C2: 0.1
F
and C2 according to the panel size watching the liquid crystal display
and drive waveforms.
CAP1+
CAP1–
CAP2–
VOUT
V5
R3
R2
R1
VDD, V0
C2
V1
V2
V3
V4
V5
VS1
VR
VSS
C1
SED1220DVV
CAP1+
CAP1–
VOUT
V5
R3
R2
R1
VDD, V0
C2
C1
V1
V2
V3
V4
V5
VR
VSS
SED1220DVV
C1
CAP2+
CAP2–
C1
VS1
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