VFM-XX Datasheet, PDF (6/7 Pages) CUI INC – DC EMI FILTER

SERIES: VFM-XX
For more information, please visit the product page.
DESCRIPTION: DC EMI FILTER
date 03/2010
page 6 of 7
INSERTION LOSS (VFM-25C)
COMMON MODE
0
-5
-10
-15
-20
-25
-30
-35
100
1000
10000
KHz
Gain
100000
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
100
DIFFERENTIAL MODE
Gain
1000
10000
KHz
100000
APPLICATION NOTES
The following application note shows EN55022 class B conducted emissions tests for the VFM-XX series EMI filters in se-
ries with a VHK or VHB series DC/DC converter and a purely resistive load. This information is for example only. Actual
results may vary.
1) EMI Filtering - Connection Diagram
Filter Model
(VFM-XX)
VFM-10A
VFM-15C
VFM-20A
VFM-25C
DC-DC Converter Model
(VHXXXW)
VHB50W-Q24-S5
VHB50W-Q48-S5
VHK200W
VHB150W-Q24-S5
VHB150W-Q48-S5
VHK200W
C1
47 μF/100 V KY
47 μF/100 V KY
•••
47 μF/100 V KY
•••
•••
C2
•••
•••
•••
220 μF/100 V KY
220 μF/100 V KY
•••
CY1
•••
•••
•••
1000 pF / 2 KV
1000 pF / 2 KV
•••
CY2
•••
•••
•••
•••
•••
•••
CY3
CY4
•••
•••
•••
1000 pF / 2 KV
1000 pF / 2 KV
•••
•••
•••
•••
560 pF/2 KV
560 pF/2 KV
•••
DC-DC
POWER
SUPPLY
LISN
C1
SPECTRUM
ANALYZER
GND
VFM-XX
C2
CY4 CY3
VHBXXW
CY1 CY2
LOAD
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