2
TDK-Lambda
PFE300SA
･
500SA Series
INSTRUCTION MANUAL
3. Block Diagram
In
pu
t c
ur
re
nt
de
te
ct
or
In
pu
t v
ol
ta
ge
de
te
ct
or
O
T
P
R
ec
ti
fi
er
F
il
te
r
O
V
P
C
on
tr
ol
c
ir
cu
it
O
C
P
S
w
it
ch
in
g
ci
rc
ui
t
In
ru
sh
c
ur
re
nt
li
m
it
in
g
ci
rc
ui
t
B
oo
st
ed
vo
lt
ag
e
de
te
ct
or
C
on
tr
ol
c
ir
cu
it
R
ec
ti
fi
er
O
ut
pu
t f
il
te
r
Switching Frequency
PFHC Circuit (fixed)
: 100kHz
DC/DC Converter Circuit (fixed)
12, 28V : 230kHz (primary), 460kHz (secondary)
DC/DC Converter Circuit (fixed)
12,
48V : 180kHz (primary), 360kHz (secondary)
4.
Sequence Time Chart
In
pu
t L
in
e
O
N
O
V
P
A
ci
tiv
at
e
In
pu
t L
in
e
C
ut
-o
ff
In
pu
t L
in
e
O
N
O
C
P
R
el
ea
se
O
C
P
A
ct
iv
at
e
In
pu
t L
in
e
C
ut
-o
ff
In
pu
t L
in
e
O
N
O
T
P
C
ir
cu
it
A
ct
iv
at
e
In
pu
t L
in
e
C
ut
-o
ff
In
pu
t L
in
e
O
N
Note : This product has no remote ON/OFF function.
V* voltage level: Refer to Application Notes “6-8.Power ON Signal (ENA Terminal)” section.
