Epson Power Supply IC S1F70000 Technical Manual page 39

S1F76620 Series
Series Connection
When S1F76620 is connected in series (V
stage respectively), the output voltage can be increased more. But the series connection makes the output impedance
high. Figure 3 shows an example of the series connection to get V
1
2
V
I
3
4
V (5V)
DD
GND(0V)
Note
When the input voltage in the next stage is as per the specification (V
output in the first stage (V
V (2V)
DD
GND(0V)
1–22
and V
DD
8
P V
OFF O
7
GND CAP1+
6
OSC1 CAP1–
5
OSC2 V
DD
Figure 3 Series Connection
V =10V
O
Figure 4 Power Supply Relations in Series Connection (1)
-V ) can be used as the input in the next stage (V
O DD
V =4V
O
Figure 5 Power Supply Relations in Series Connection (2)
in the previous stage are connected to GND and V
O
= 15V from V
O
Vo=2 V
• I
+
+
–
–
First stage Next stage
V
GND'
First stage Next stage
V
GND'
EPSON
= 5V.
DD
1
P V
OFF O
2
GND CAP1+
3
OSC1 CAP1–
4
OSC2 V
DD
V '=15V
O
'
DD
-GND 8V) in a series connection, the
DD
-GND). (See Figure 5.)
DD
V '=8V
O
'
DD
in the next
DD
Vo'=3 V
• I
8
7
+
–
+
6
–
5
S1F70000 Series
Technical Manual