Epson S1F70000 User Manual
S1F71100 Series
S1F70000 Series
EPSON
4–39
Technical Manual
S1F71100
Series
EXAMPLE OF EXTERNAL CONNECTION OF REFERENCE CIRCUIT
Example of Standard Circuit
–
+
+
–
+
–
POFFX
I
SENSE
SWO
V
SS
V
DD
V
DD
CIN2
CIN1
SSCAP
SSCAP
soft start
soft start
V
O
ERCAP
ERCAP
phase
compen-
sation
Low-voltage
protection circuit
protection circuit
Error amplifier
Driver
Overcurrent
protection
circuit
Load current
detection resistor R
detection resistor R
Pch
MOSTr
MOSTr
D
CV
OUT
V
O
3.3V
L
PWM circuit
Soft start Oscillator
Reference
voltage circuit
voltage circuit
Parts examples
CIN1
100
µ
F
(Sanyo 16SA100M)
CIN2
1
µ
F
SSCAP
0.1
µ
F
ERCAP
330pF
R
100m
Ω
PchTr
(Hitachi 2SJ484)
L
47
µ
H
(Sumida CD105)
CV
O
47
µ
F
(Sanyo 16SA47M)
D
Schottkey
(Rohm RB161L-40)
* Characteristics vary with applicable conditions and
parts. Select proper parts after sufficient evaluation.