S6B1713
65 COM / 132 SEG DRIVER & CONTROLLER FOR STN LCD
Voltage Converter Circuits
These circuits boost up the electric potential between V
DD
and V
SS
to 2, 3, 4 or 5 times toward positive side and
boosted voltage is outputted from VOUT pin.
[C1 = 1.0 to 4.7
碌
F]
V
DD
V
DD
VOUT
C3+
C3 -
C2+
C2 -
C1+
C1 -
DCDC5B
V
SS
GND
-
+
C1
V
DD
V
DD
VOUT
C3+
C3 -
C2+
C2 -
C1+
C1 -
DCDC5B
V
SS
GND
-
C1
+
VOUT = 3
脳
V
DD
+
-
VOUT = 2
脳
V
DD
C1
V
DD
V
DD
V
SS
+
C1
-
+
C1
-
V
DD
V
DD
V
SS
Figure 16. Two Times Boosting Circuit
Figure 17. Three Times Boosting Circuit
V
DD
V
DD
VOUT
C3+
C3 -
C2+
C2 -
C1+
C1 -
DCDC5B
V
SS
GND
V
SS
-
+
+
C1
C1
VOUT = 4
脳
V
DD
V
DD
V
DD
VOUT
C3+
C3 -
C2+
C2 -
C1+
C1 -
DCDC5B
V
SS
GND
GND
-
+
+
C1
-
+
C1
-
+
C1
-
C1
VOUT = 5
脳
V
DD
-
+
C1
-
+
C1
-
V
DD
V
DD
V
DD
V
SS
Figure 18. Four Times Boosting Circuit
Figure 19. Five Times Boosting Circuit
25