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(4) Serial Connection
The serial connection in the S1F76640 (connecting V
next stage respectively) further increases output voltage. However, the serial connection raises output
impedance. Fig.8.8 shows an example of serial connection for further stabilizing output by obtaining V
25V from V
= 5V.
DD
V
REG
1
RV
2
V
REG
R
L
3
TC1
4
TC2
I
A
O
5
XP
OFF
V
SS
V
6
SS
R
OSC
OSC1
7
1MΩ
8
OSC2
V
(=V
')
DD
SS
V
(+10V)
OUT
V
(+5V)
DD
V
(0V)
SS
S1F76640 Technical Manual (Rev.1.5)
VRI
16
V
15
OUT
CAP3+
14
C4
CAP2+
13
+
10μF
−
C3
CAP2−
12
+
10μF
−
CAP1+
11
CAP1−
10
V
9
DD
Fig.8.8 Serial Connection
First stage
2 $ V
Max.6.0V
DD
Fig.8.9 Diagram of Voltage Relations in Serial Connection
25
20
15
Ta=25°C
10
0
1
2
Fig.8.10 Output Voltage - Output Current
8. APPLIED CIRCUIT EXAMPLES
and V
DD
1
RV
D1
2
V
REG
3
TC1
R2
R
RV
1MΩ
4
TC2
C5
+
R1
10μF
5
XP
OFF
−
6
V
SS
7
OSC1
8
OSC2
V
'(+25V)
OUT
Next stage
4 $ (V
V
'
DD
V
'
SS
3
4
5
6
7
I
[mA]
O
EPSON
in the pre-stage to V
O
VRI
16
V
15
O
CAP3+
14
CAP2+
13
C2'
+
10μF
−
CAP2−
12
C3'
+
10μF
−
CAP1+
11
C1'
+
10μF
−
CAP1−
10
V
9
DD
V
REG
'－V
'）
DD
SS
8
and V
in the
SS
DD
=
O
V
(=V
')
OUT
DD
V
'
OUT
C4'
+
10μF
−
19
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