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INSTRUCTION MANUAL
ZWS300RC
Series
TDK-Lambda
<Page>
3. Block Diagram
•Circuit topology, switching frequency
Switching Circuit : Cascade forward topology 130kHz
PFHC circuit : Active filter 50kHz-70kHz (Spread)
•Fuse rating : 6.3A
5/17
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F
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it
P
FH
C
C
ir
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it
In
ru
sh
C
ur
re
nt
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it
F
ilt
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it
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C
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OCP
Circuit
OVP
Circuit
Output
Sensing
Photo-
coupler
Photo-
coupler
R
ec
tif
ie
r
&
F
ilt
er
C
ir
cu
it
Remote
ON/OFF
Control
Photo-
coupler
Input
85
~
265VAC
FG
+V
-V
Output
+R
-R
*Option model “/R”
OVP
Sensing
*Option model ”
/BM
”
+
-