Data Sheet
February 9, 2012
FLT012A0Z/FLT012A0-SZ Input Filter Modules
75Vdc Input Voltage Maximum; 12A Output Current Maximum
Features
Compliant to RoHS EU Directive 2002/95/EC (Z
versions)
Compatible in a Pb-free or SnPb reflow environment
(Z versions)
Surface Mount and Through hole versions
Common-mode and Differential-mode filtering
Small size and low profile
48.3 mm x 25.4 mm x 11.7 mm
(1.9 in x 1.0 in x 0.46 in)
Same footprint as FLTR100V10 module
Cost efficient open frame design
Wide operating temperature range (-40°C to +85°C)
Meets the voltage isolation requirements for
ETSI 300-132-2
UL*
60950-1, 2
nd
Ed. Recognized,
CSA
†
C22.2 No.
60950-1-07 Certified, and
VDE
‡
(EN60950-1, 2
nd
Ed.)
Licensed
CE mark meets 2006/95/EC directives
§
Applications
Distributed power architectures
Wireless Networks
Enterprise Networks
Access and Optical Network Equipment
ISO** 9001 and ISO 14001 certified manufacturing
facilities
Options
Surface Mount Interconnect (-S)
Description
The Filter module shall be designed to operate over an input voltage range up to 75Vdc at output current
of 12A in an ambient temperature of -40ºC to 85ºC. The filter module shall be optimized for use with
dc/dc converter modules, to significantly reduce the conducted differential and common-mode noise
returned to the power source. The filter module shall enable designers to meet the requirements of EMI
standards CISPR 22 (EN55022) and FCC Class B by inserting in-line between the power source and the
dc/dc converter module. These modules shall be designed and manufactured to be either surface
mounted
(-S version)
or through hole mounted on PCBs.
*
UL
is a registered trademark of Underwriters Laboratories, Inc.
†
‡
CSA
is a registered trademark of Canadian Standards Association.
VDE
is a trademark of Verband Deutscher Elektrotechniker e.V.
** ISO is a registered trademark of the International Organization of Standards
§
This product is intended for integration into end-user equipment . All of the required procedures of end-use equipment should be followed.
Document No:DS11-026 ver 1.2
PDF name: FLT012A0Z_FLT012A0-SZ_ds.pdf
Preliminary Data Sheet
August 9, 2005
FLT007A0/FLT007A0-SR Input Filter Modules
75Vdc Input Voltage Maximum, 7A Output Current Maximum
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are
absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in
excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for
extended periods can adversely affect the device reliability.
Parameter
Input Voltage
Continuous
Transient (100ms)
Operating Ambient Temperature
Storage Temperature
I/O to Ground Isolation (100% Factory Tested)
Input to GND Insulation
All
All
All
All
V
IN
V
IN, TRANS
T
A
T
stg
−
0
0
-40
-55
−
10
75
100
85
125
1500
-
Vdc
V
°C
°C
Vdc
M
Ω
Device
Symbol
Min
Max
Unit
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions.
Parameter
Operating Input Voltage
Maximum Input-to-Output Current
(V
IN
= 0 to V
iN,max
)
Resistance per leg
Maximum Average Current
(T
A
= 60
°
C, 2.03 m/s (400lfm) air)
Maximum Average Current
(T
A
= 60
°
C, natural convection)
All
All
I
max
R
I
max
I
max
12
20
12
8
Adc
mΩ
A
A
Device
All
Symbol
V
IN
Min
0
Typ
24/48
Max
75
Unit
Vdc
CAUTION: This power module is not internally fused. An input line fuse must always be used.
This power module can be used in a wide variety of applications, ranging from simple standalone operation to an
integrated part of sophisticated power architecture. To preserve maximum flexibility, internal fusing is not included,
however, to achieve maximum safety and system protection, always use an input line fuse. The safety agencies
require a fast-acting fuse with a maximum rating of 15 A (see Safety Considerations section). Based on the
information provided in this data sheet on inrush energy and maximum dc input current, the same type of fuse with a
lower rating can be used. Refer to the fuse manufacturer’s data sheet for further information.
2
Data Sheet
February 9, 2012
FLT012A0Z/FLT012A0-SZ Input Filter Modules
75Vdc Input Voltage Maximum, 12A Output Current Maximum
Insertion Loss Tables
Parameter
Common-mode Insertion Loss
50Ω circuit, 500kHz
50Ω circuit, 1MHz
50Ω circuit, 10MHz
Differential-mode Insertion Loss
50Ω circuit, 500kHz
50Ω circuit, 1MHz
50Ω circuit, 10MHz
All
All
All
50
52
48
55
57
53
All
All
All
41
51
69
45
56
75
dB
Device
Symbol
Min
Typ
Max
Unit
dB
dB
dB
dB
dB
General Specifications
Parameter
Calculated MTBF (V
IN
= V
IN, nom
, I
O
= 0.8I
O, max
, T
A
=40°C)
Telecordia SR 332 Issue 2: Method 1, case 3
Weight
⎯
Min
Typ
150,609,226
12 (0.42)
⎯
Max
Unit
Hours
g (oz.)
LINEAGE
POWER
3
Data Sheet
February 9, 2012
FLT012A0Z/FLT012A0-SZ Input Filter Modules
75Vdc Input Voltage Maximum, 12A Output Current Maximum
Characteristic Curves
The following figures provide typical characteristics for the FLT012A0 Module.
INSERTION LOSS (dB)
INPUT
8
4
N
5
1 ame = 4
8
4
N
5
1 ame = 4
OUTPUT
GROUND
FREQUENCY (MHz)
Figure 1. Typical Common-Mode Insertion Loss in a
50Ω circuit.
Figure 4. Internal Schematic
INSERTION LOSS (dB)
FREQUENCY (MHz)
Figure 2. Typical Differential-Mode Insertion Loss in a
50Ω circuit.
14
OUTPUT CURRENT, Io (A)
12
10
8
6
4
2
0
20
30
40
50
60
70
O
80
90
Natural
Convection 00.5m/s
(100lfm)
1m/s
(200lfm)
2m/s
(400lfm)
AMBIENT TEMPERATURE, T
A
C
Figure 3. Derating Output Current versus Local
Ambient Temperature and Airflow.
LINEAGE
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4
Data Sheet
February 9, 2012
FLT012A0Z/FLT012A0-SZ Input Filter Modules
75Vdc Input Voltage Maximum, 12A Output Current Maximum
Application Guidelines
Conducted noise on the input power lines can occur
as either differential-mode or common-mode noise
currents. Differential-mode noise is measured
between the two input lines, and is found mostly at
the low frequency end of the spectrum. This noise
shows up as noise at the fundamental switching
frequency and its harmonics. Common-mode noise is
measured between the input lines and ground and is
mostly broadband noise above 10 MHz. The high-
frequency nature of common-mode noise is mostly
due to the high-speed switching transitions of power
train components. Either or both types of noise may
be covered in a specification, as well as a
combination of the two.
Differential-mode noise is best attenuated using a
filter composed of line-to-line capacitors (X caps) and
series inductance, provided by either a discrete
inductor or the leakage inductance of a common-
mode choke. In addition to the differential filtering
provided by the filter module, it is recommended that
an electrolytic capacitor be located at the converter
side of the filter to provide additional attenuation of
low-frequency differential noise and to provide a low
source impedance for the converter, preventing input
filter oscillations and load transient induced input
voltage dips.
Open-frame DC/DC converter modules and the older
metal-cased DC/DC converter modules require
slightly different filtering arrangements. The
FLT012A0 series of modules are optimized for the
newer open-frame series of modules, but can also be
used with older metal-case modules. The main
differences in filtering recommendations between the
two types of modules are in common-mode filtering,
as explained below.
VI(+)
VI(+)
C2
VO(+)
FILTER
MODULE
VI(-)
CHASSIS GROUND
C1
DC/DC
CONVERTER
MODULE
VI(-)
VO(-)
C3
Figure 5. Schematic diagram showing
recommended connection of the FLT012A0 filter
module with open-frame DC/DC converter
modules.
C
2
Input
V
IN
+
FLT012A0
MODULE
GND
Load
V
O
+ PLANE
V
O
+
V
I
+
V
O
+
C
1
DC/DC
CONVERTER
V
IN
-
CHASSIS
GROUND
V
O
-
V
I
-
V
O
-
V
O
−
PLANE
C
3
Figure 6. Diagram showing recommended layout
of the FLT012A0 filter module with open-frame
DC/DC converter modules.
Filtering Metal-Case DC/DC Converter
Modules
For metal-case DC/DC converter modules with a case
pin, a different filtering arrangement and layout is
recommended. Figure 7 shows the schematic
diagram of the recommended circuit. The main
difference with open-frame module is the use of an
isolated shield plane located underneath the module
which is connected through capacitors C2 through C5
to the input and output connections of the module.
The shield plane along with the case of the module
serves as a Faraday shield helping reduce EMI. The
corresponding layout for metal-case modules is
shown in Fig. 8.
Filtering Open-Frame DC/DC
Converter Modules
For filtering open-frame DC/DC converter modules,
the recommended circuit is shown in Fig. 5. In
addition to the input electrolytic filter capacitor C1
(recommended value is a minimum of 100uF and
approximately 1uF/W at power levels above 100W),
common-mode filtering capacitors C2 and C3 should
be connected between the input and outputs as
shown. Suitable values for common-mode capacitors
C2 and C3 are in the range between 1000pF to 0.1μF
are usually indicated in the DC/DC converter data
sheet. These capacitors need to be rated for the
isolation voltage desired between the input and output
sides of the DC/DC converter module. The
recommended power layout of the modules showing
where the two common-mode capacitors are to be
placed is shown in Fig. 6.
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