GE Industrial Solutions FLT007A0-SRZ - Manual (Page 6)

Data Sheet
July 14, 2010
FLT007A0Z/FLT007A0-SRZ Input Filter Modules
75Vdc Input Voltage Maximum, 7A Output Current Maximum
LINEAGE POWER 6
CHASSIS GROUND
VI(+)
VI(-)
VO(+)
VO(-)
CASE
DC/DC
CONVERTER
MODULE
C1 FILTER
MODULE
VI(+)
VI(-)
C3 C2 C4 C5
SHIELD PLANE
Figure 7. . Schematic diagram showing
recommended connection of the FLT007A0Z
filter module with metal-cased DC/DC converter
modules.
C
2
Load
FLT007A0
MODULE
DC/DC
CONVERTER
C
3
C
1
V
I
+ V O +
V
O
− V
I
−
CASE
C
5
C
4
SHIELD
PLANE
V IN + V O +
V
IN
− V
O
−
V
IN
+
V
IN
−
CHASSIS
GROUND
Input
GND
Figure 8. Diagram showing recommended
layout of the FLT007A0Z filter module with
metal-case DC/DC converter modules.
Example Data Showing Results using
the FLT007A0Z Modules
Figure 9 shows example results obtained using a
QBE025A0B1 DC/DC converter module with the
FLT007A0Z filter module. The QBE025A0B1 module
is operated at an input voltage of 43.2V and output
loading corresponding to an input current of 6.2A, a
level close to the 7A capability of the FLT007A0Z filter
module. A 10nF ceramic capacitor was connected
between Vin(-) and Vo(-) and a 4700pF ceramic
capacitor between Vin(+) and Vo(+). The results show
that the filter module is capable of meeting EN55022
Class B limits with sufficient margin.
0
10
20
30
40
50
60
70
80
Level [ dB µV ]
150k 300k 500k 1M 2M 3M4M 5M 7M10M 30M
Fr equency [ H z]
Figure 9. Experimental results showing
conducted EMI measured using a FLT007A0Z
module with a QBE025A0B1 DC/DC converter.