Example of reference external connection, Epson – Epson Power Supply S1F70000 User Manual
Page 38
S1F76620 Series
S1F70000 Series
EPSON
1–21
Technical Manual
S1F76620
Series
EXAMPLE OF REFERENCE EXTERNAL CONNECTION
2 Times Step-up
2 times step-up output of V
O
(2
×
V
DD
) is obtained from the circuit shown in Figure 1.
P
OFF
2 V
I
V
I
+
–
+
–
GND
OSC1
OSC2
V
O
CAP1+
CAP1–
V
DD
1
2
3
4
8
7
6
5
•
Figure 1 2 Time Step-up Operation
Parallel Connection
It is possible to make the output impedance (R
O
) small when several pieces of the circuit shown in Figure 1 are
connected. Parallel connection of n circuits reduces R
O
to 1/n approximately. One piece of the smoothing capacitor
C
2
can be commonly used.
P
OFF
V
I
+
_
+
_
GND
OSC1
OSC2
V
O
CAP1+
CAP1–
V
DD
1
2
3
4
8
7
+
_
6
5
P
OFF
GND
OSC1
OSC2
V
O
CAP1+
CAP1–
V
DD
1
2
3
4
8
7
6
5
Figure 2 Parallel Connection