9. REFERENCE: EXTERNAL CONNECTION EXAMPLES
26
EPSON
S1F76540M0C Series Technical Manual
(Rev.1.1)
9.8 High-Magnification Boosting Using a Diode
Loading an external diode in S1F76540 enables the “quintuple or more bo regulator” connection. Using
the forward voltage lowering VF in a diode raises the boosting output impedance; therefore, you should load a
diode with the lower VF value.
9.8.1 Quintuple Bo Regulator
Figure 9.9 shows a “quintuple bo regulator” connection example with one diode used. The cable from
VO to VRI must be as short as possible. Figure 9.10 shows the electric potential relation diagram.
Figure 9.9 Quintuple boosting connection example using one diode
Figure 9.9 Setting conditions
Internal clock
: ON (Low output mode)
Booster
: ON
Regulator
: ON (Select CT0 = -0.05
%
/
°
C.)
Figure 9.10 Quintuple-boosting potential relation using one diode
V
DD
VI
VO
VO
4VI
5VI
VF
5VI
－
VF
R1 R2
V
DD
VO
1
VRI
V
REG
RV
V
DD
FC
TC1
TC2
C2P
C2N
C3N
C1N
C1P
VI
POFF1X
POFF2X
2
3
4
5
6
7
8
10
9
11
12
13
14
15
16
1
C2
C3
+
C1
+
CI
+
CREG
+
VI
V
REG
CO
+
C4
+
D1
VO’
