Series Connection - Epson Power Supply IC S1F70000 Technical Manual

S1F76640 Series
Parallel Connection
It is possible to make the output impedance R
connected. Parallel connection of n circuits reduces R
tor C can be commonly used in the same way. To get stabilized outputs after parallel connection, include 1 pieces
4
of the circuit shown in Figure 8.2 in the parallel connection of n circuits as shown in Figure 8.3.
V
REG
R
RV
(100k =1M )

Series Connection

When S1F76640 is connected in series (V
next stage respectively), the output voltage can be increased more. But the series connection makes the output
impedance high. Figure 8.4 shows an example of the series connection to get V
stabilize it.
1 RV
2 V
3 TC1
4 TC2
5 P
6 V
7 OSC1
8 OSC2
2–58
1 RV V
2 V V
REG
3 TC1 CAP3+
4 TC2 CAP2+
5 P CAP2–
OFF
6 V CAP1+
SS
7 OSC1 CAP1–
8 OSC2 V
DD
Figure 8.3 Parallel Connection
DD
V 16
RI
V 15
REG O
CAP3+ 14
CAP2+ 13
CAP2– 12
OFF
CAP1+ 11
SS
C
1
CAP1– 10
9
V
DD
Figure 8.4 Series Connection
small when several pieces of the circuit shown in Figure 8.1 are
O
to 1/n approximately. One piece of the smoothing capaci-
O
16
RI
15
O
14
+
C
2
13 – C
4
+
C
3
–
12
+
C
1
–
11
+
–
10
9
and V in the previous stage are connected to GND and V
O
D
1
+
–
+
–
EPSON
1 RV V 16
RI
2 V V 15
REG O
3 TC1 CAP3+ 14
4 TC2 CAP2+ 13
5 P CAP2– 12
OFF
6 V CAP1+ 11
SS
7 OSC1 CAP1– 10
8 OSC2 V 9
DD
=25V from V
O
1 RV V 16
RI
2 V V 15
REG O
3 TC1 CAP3+ 14
4 TC2 CAP2+ 13
5 P CAP2– 12
OFF
6 V CAP1+ 11
SS
7 OSC1 CAP1– 10
8 OSC2 V 9
DD
+
C
2
– +
C
3
–
+
C
1
–
in the
DD
=5V and to
DD
+ –
+
+
–
–
+
–
S1F70000 Series
Technical Manual