INSTRUCTION MANUAL
PFE500F
Series
TDK-Lambda
<Page>
■
Block Diagram
Switching Frequency
PFHC circuit (fixed) :100kHz
DC/DC converter (fixed) :230kHz (primary), 460kHz (secondary)
■
Sequence Time Chart
V* voltage level: Refer to Application Notes “13.Power ON Signal” section.
4/21
In
pu
t v
ol
ta
ge
de
te
ct
or
R
ec
tif
ie
r
F
ilt
er
O
C
P
R
ec
tif
ie
r
O
ut
pu
t f
il
te
r
+V
-V
IOG
TRI
M
+S
-S
AC(L)
AC(N)
In
ru
sh
c
ur
re
nt
li
m
it
in
g
ci
rc
ui
t
+BC -BC
R
PC
ENA
+ON/OFF
-ON/OFF
AUX
COM
PFHC
DC/DC Converter
O
C
P
O
V
P
O
T
P
(P
FH
C
)
In
pu
t v
ol
ta
ge
de
te
ct
or
(D
C
-D
C
)
S
w
it
ch
in
g
ci
rc
ui
t
PFHC
circuit
P
FH
C
&
B
P
S
C
on
tr
ol
c
ir
cu
it
B
ia
s
po
w
er
su
pp
ly
S
ec
on
da
ry
co
nt
ro
l
O
ut
pu
t v
ol
ta
ge
de
te
ct
or
D
C
-D
C
C
on
tr
ol
ci
rc
ui
t
In
pu
t c
ur
re
nt
de
te
ct
or
O
C
P
B
oo
st
ed
vo
lt
ag
e
de
te
ct
or
O
V
P
O
T
P
(D
C
-D
C
)
Input Voltage
Output Voltage
BC Terminal Voltage
(Boost Voltage)
L
H
ON/OFF
Control
L
H
IOG
L
H
ENA
L
H
In
pu
t L
in
e
O
N
O
V
P
T
ri
p
O
C
P
R
el
ea
se
O
C
P
A
ct
iv
e
In
pu
t L
in
e
O
FF
In
pu
t L
in
e
O
N
O
T
P
T
ri
p
AUX
L
H
C
on
tr
ol
O
F
F
C
on
tr
ol
O
N
C
on
tr
ol
O
F
F
C
on
tr
ol
O
N
C
on
tr
ol
O
F
F
C
on
tr
ol
O
N
390VDC (Typ)
V*
V*
