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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
V
O
ERCAP
ERCAP
phase
compen-
sation
Low-voltage
protection circuit
Error amplifier
Driver
Overcurrent
protection
circuit
Load current
detection resistor R
Pch
MOSTr
DCV
OUT
V
O
3.3V
L
PWM circuit
Soft start Oscillator
Reference
voltage circuit
Parts examples
CIN1 100µF (Sanyo 16SA100M)
CIN2 1µF
SSCAP 0.1µF
ERCAP 330pF
R 100mΩ
PchTr (Hitachi 2SJ484)
L47µH (Sumida CD105)
CV
O 47µF (Sanyo 16SA47M)
D Schottkey (Rohm RB161L-40)
* Characteristics vary with applicable conditions and
parts. Select proper parts after sufficient evaluation.