INSTRUCTION MANUAL
ZWP350-1000 Series
TDK-Lambda
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3. Block Diagram
Circuit topology, switching frequency
Switching circuit : LLC resonant converter (*)
75kHz to 120kHz
*At light-load or no-load condition, switching will be in burst-mode at intermittent switching frequency.
PFHC circuit : active filter
100kHz (fixed)
Standby supply : flyback converter
100kHz (jittering)
Fuse rating
16A
L
in
e
F
il
te
r
R
ec
tif
ie
r
In
ru
sh
C
ur
re
nt
L
im
it
C
ir
cu
it
F
ilt
er
L
N
Primary
Current
Sensing
Photo-
coupler
Input
85
~
265VAC
+V
Output
-V
+RS/-RO
-R
Remote ON/OFF
Control
OVP
Sensing
Disable
Circuit
Photo-
coupler
+STB
-STB
P
FH
C
C
ir
cu
it
S
w
it
ch
in
g
C
ir
cu
it
F
ilt
er
R
ec
tif
ie
r
Output Current
Sensing
Standby
supply
Output Voltage
Sensing
Timer
Circuit
LDO
CC
Circuit
Photo-
coupler
C
on
tr
ol
C
ir
cu
it
C
on
tr
ol
C
ir
cu
it