Example Of External Connection Of Reference Circuit - Epson Power Supply IC S1F70000 Technical Manual

EXAMPLE OF EXTERNAL CONNECTION OF REFERENCE CIRCUIT

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