ST7533 Sitronix Technology, ST7533 Datasheet - Page 21

• Manufacturer Part Number: ST7533
• Description: 33 x 96 Dot Matrix LCD Controller/Driver
• Manufacturer: Sitronix Technology

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ST7533
* The V
The Voltage Regulator Circuit
The step-up voltage generated at
driver voltage
Because the ST7533 chips have an internal high-accuracy
fixed voltage power supply with a 64-level electronic volume
Ver 1.0
C1
C1
C1
C1
SS2
4x step-up voltage circuit
voltage range must be set so that the V
V
4x step-up voltage relationships
OUT
V5
=4xV
CAP1+
CAP2+
CAP3-
CAP1-
CAP2-
V
V
through the voltage regulator circuit.
OUT
VSS2=-3V
SS2
SS2
V
DD
=-12V
=0V
VOUT
outputs the LCD
C1
C1
C1
OUT
3x step-up voltage circuit
terminal voltage does not exceed the absolute maximum rated value.
3x step-up voltage relationships
V
OUT
Figure 7
CAP1+
CAP2+
CAP3-
CAP1-
CAP2-
=3xV
21/60
V
V
OUT
SS2
VSS2=-3V
V
SS2
function and internal resistors for the V
systems can be constructed without having to include
high-accuracy voltage regulator circuit components.
(
DD
VREG
=-9V
=0V
thermal gradients approximate -0.15%/°C)
C1
C1
2x step-up voltage circuit
OPEN
2x step-up voltage relationships
V
OUT
CAP1+
CAP2+
CAP3-
CAP1-
CAP2-
=2xV
V
V
OUT
VSS2=-3V
SS2
V
5
SS2
DD
voltage regulator,
=-6V
=0V
2003/07/21