FMSA-461 [CRANE]
EMI INPUT FILTER 28 VOLT INPUT; EMI输入滤波器28伏特的输入
| 型号： | FMSA-461 |
| 厂家： | 
Crane Aerospace & Electronics. |
| 描述： | EMI INPUT FILTER 28 VOLT INPUT |
| 文件： | 总6页 (文件大小：233K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
FEATURES
FMSA EMI FILTER
0.8 AMP
EMI INPUT
28 VOLT
F
ILTER
NPUT
• –55°C to +125°C operation
• 50 dB minimum attenuation
at 500 kHz
• Compliant to MIL-STD-461C, CE03
• Compatible with MIL-STD-704E
DC power bus
I
MODEL
FMSA-461
0.8 amp
Size (max.): 0.980 x 0.805 x 0.270 (24.89 x 20.45 x 6.86 mm)
Case A1
Weight:
10.3 grams typical, 11.5 grams maximum
Screening: Standard, ES, or 883 (Class H)
DESCRIPTION
The FMSA filter can also be used with other types of Interpoint
power converters (MHF, MHF+, MHE, MHD, and DCH series) to
comply with CE03. For MHF, MHF+, MHD, and MHE models, the
converter has an LC type line filter such that an inductor is seen
looking into its positive input terminal. For these converters, it is
necessary to terminate the filter with a capacitor to insure uncondi-
tionally stable operation. A capacitor across the filter output termi-
nals of greater than 4µF or the optional damping circuit shown on
the connection diagram will be adequate for stable operation. No
capacitor is required for MSA, or DCH models.
The FMSA-461 EMI filter module has been designed as a
companion for Interpoint MSA flyback power converters. Multiple
MSA power converters can be operated from a single filter provided
the total power line current does not exceed the filter maximum
rating. The FMSA filter will reduce the MSA’s power line reflected
ripple current to within the limit of MIL-STD-461C, Method CE03, as
shown in the example of Figures 4 and 5.
The FMSA is fabricated using thick film hybrid technology and is
sealed in a metal package for military, aerospace and other appli-
cations requiring EMI suppression. The filter uses only ceramic
capacitors for reliable high temperature operation.
OPTIONAL DAMPING CIRCUIT
The optional damping circuit (Figure 2) can be used to prevent filter
overshoot caused by MIL-STD-704A 80 V, or other, transients
having rise times of less than 200 µSec. This damping can be alter-
nately provided with a 1.50 Ω resistor in series with the filter positive
input where the additional line loss can be tolerated. For transients
with rise times of greater than 200 µsec, there is no overshoot and
the damping circuit is not required.
OPERATION
The MSA power converter has an internal 2 µF capacitor across its
input power terminals. When the MSA and FMSA filters are used
together, this capacitor becomes part of the filter and forms its final
LC output section. When 2 or 3 MSAs are used with a single filter,
this capacitor becomes 4 µF or 6 µF respectively, rather than 2 µF,
improving the rejection vs. frequency.
LAYOUT REQUIREMENTS
The case of the filter must be connected to the case of the converter
through a low impedance connection to minimize EMI.
®
1
FMSA EMI FILTER
0.8 AMP
EMI INPUT
F
ILTERS
RECOMMENDED OPERATING CONDITIONS
ABSOLUTE MAXIMUM RATINGS
TYPICAL CHARACTERISTICS
Input Voltage
Input Voltage Range
Capacitance
• 0 to 40 VDC continuous
• 80 V for 100 ms transient
Lead Soldering Temperature (10 sec per lead)
• 300°C
Storage Temperature Range (Case)
• –65°C to +150°C
• 16 to 40 VDC continuous
Case Operating Temperature (Tc)
• –55°C to +125°C full power
Derating Input/Output Current
• Derate linearly from 100% at 100°C to 0.60
amps at 125°C case. Above 125°C derate to 0%.
• 0.045 µF max, any pin to case
Isolation
• 100 megohm minimum at 500 V
• Any pin to case, except case pin
Electrical Characteristics: 25°C Tc, nominal Vin, unless otherwise specified.
FMSA-461
PARAMETER
INPUT VOLTAGE
CONDITIONS
CONTINUOUS
MIN
0
TYP
28
—
MAX
40
UNITS
VDC
V
TRANSIENT, 100 ms
—
80
INPUT CURRENT
DIFFERENTIAL MODE
NOISE REJECTION
COMMON MODE
—
—
0.80
—
A
200 kHz
40
60
—
dB
500 kHZ TO 50 MHz
—
—
NOISE REJECTION
2 MHz - 50 MHz
TC = 25°C
40
—
—
—
—
dB
DC RESISTANCE (R
)
1.2
Ω
DC
V
= V - I (R
)
DC
OUTPUT VOLTAGE
OUTPUT CURRENT
STEADY STATE
VDC
A
OUT
IN IN
STEADY STATE (<100°C CASE)
—
—
—
—
0.80
0.96
INTERNAL POWER
DISSIPATION
MAXIMUM CURRENT
W
>285 H
6 H
6 H
0.65 ⍀
Positive
Output
Positive
Input
6800 pF
500 V
x 2
0.014 F / 500 V
20 ⍀
20 ⍀
2 F
2 F
x 2
6800 pF
500 V
0.014 F / 500 V
Output
Common
Input
Common
0.014 F / 500 V
FMSA-461
The case ground connection between the filter and the converter should be as low an impedance as possible
to minimize EMI. Direct contact of baseplate to chassis ground provides the lowest impedance.
FIGURE 1: SCHEMATIC – TYPICAL VALUES
®
2
FMSA EMI FILTER
0.8 AMP
EMI INPUT
FILTERS
FMSA-461
DC/DC Converter
Positive
Output
Positive
Output
Positive
Input
Positive
Input
C
R
Case
Ground
Case
Ground
R
L
Input
Common
Output
Common
Input
Common
Output
Common
The RC output is an optional
damping circuit. It is recommended in
applications where 80 volt line
transients may occur with rise times
<200 s. See text page one
Multiple units
allowed up to
R
L
rated output current.
"Connection and Operation."
C = 10 F, 100V –
C = Sprague 109D106X9100C2
R = 2.2 , 5%, 1/4 W, Carbon comp.
FIGURE 2: DAMPING CIRCUIT
PIN OUT
Squared corner and
dot on top of cover
indicate pin one.
Pin
1
Designation
Positive Input
Positive Output
Case Ground
Output Common
Input Common
Case Ground
2, 3
4
1
8
2 3
BOTTOM
VIEW
4
5, 6
7
FMSA
6 5
7
8
See Section B8, case A1, for dimensions.
FIGURE 3: PIN OUT
MODEL NUMBERING KEY
DSCC NUMBER
DSCC DRAWING
(5915)
FMSA-461 FILTER
SIMILAR PART
FMSA - 461
Base Model
/
883
MIL-STD-461 Reference
Screening
96003-01HXC
FMSA-461/883
(Standard screening has no designator
in this position.)
For exact specifications for a DSCC product, refer to the
DSCC drawing. See Section A3, “SMD/DSCC Lists”, for
more information.
®
3
FMSA EMI FILTER
0.8 AMP
EMI INPUT
FILTERS
Typical Performance Curves: 25°C Tc , nominal Vin, unless otherwise specified.
90
80
NARROWBAND
70
60
50
40
30
20
10
0
.015
0.1
1
10
50
FREQUENCY (MHz)
MSA2805S converter without a filter.
FIGURE 4
90
80
NARROWBAND
70
60
50
40
30
20
10
0
.015
0.1
1
10
50
FREQUENCY (MHz)
MSA2805S converters at full load with
an FMSA-461 EMI filter
FIGURE 5
10.0
3.2
1.0
0.32
0.10
2 µF external capacitor on filter output
1K
10K
100K
1M
FREQUENCY (Hz)
Typical Output Impedance (Z)
With Input Shorted
FMSA-461 EMI Filter
FIGURE 6
®
4
FMSA EMI FILTER
0.8 AMP
EMI INPUT
FILTERS
Dot on top of case
indicates pin one.
CASE A
BOTTOM VIEW
0.805 max
(20.45)
See cases A1 - A3
for pin configurations.
0.980 max
(24.89)
Materials
Header
Kovar/Nickel/Gold
(Case A3, Kovar/Nickel)
Kovar/Nickel
Cover
Pins
Kovar/Nickel/Gold,
matched glass seal
Case dimensions in inches (mm)
Tolerance 0.005 (0.13) for three decimal places
0.01 (0.3) for two decimal places
unless otherwise specified
CAUTION
Heat from reflow or wave soldering may damage
the device. Solder pins individually with heat
application not exceeding 300 C for 10 seconds
per pin.
FIGURE 7: CASE A MAXIMUM DIMENSIONS
BOTTOM VIEW CASE A1
FMSA EMI Filter and STF EMI Filter
Projection Weld
Seam Seal
Squared corner and dot on
top of case indicate pin one.
0.697
(17.70
1
8
2
3
4
0.397
(10.08)
0.097
(2.46)
0.000
7
6 5
0.018 0.002 dia.
(0.46 0.05)
Seal hole: 0.056 0.002 (1.42 0.05)
FIGURE 8: CASE A1
Please refer to the above written numerical dimensions for accuracy.
®
5
FMSA EMI FILTER
0.8 AMP
EMI INPUT
FILTERS
QA SCREENING
125°C PRODUCTS
125°C PRODUCTS
TEST (125°C Products)
125°C
125°C
/ES
STANDARD
/883 (Class H)*
Pre-cap Inspection
Method 2017, 2032
yes
yes
yes
Temperature Cycle (10 times)
Method 1010, Cond. C, -65°C to 150°C, ambient
Method 1010, Cond. B, -55°C to 125°C, ambient
no
no
no
yes
yes
no
Constant Acceleration
Method 2001, 300 g
Method 2001, 500g
no
no
no
yes
yes
no
Burn-In
Method 1015, 160 hours at 125°C case, typical
96 hours at 125°C case, typical
no
no
no
yes
yes
no
Final Electrical Test MIL-PRF-38534, Group A
Subgroups 1 through 6: -55°C, +25°C, +125°C case
Subgroups 1 and 4: +25°C case
no
yes
no
yes
yes
no
Hermeticity Test
Fine Leak, Method 1014, Cond. A
Gross Leak, Method 1014, Cond. C
Gross Leak, Dip (1 x 10 )
no
no
yes
yes
yes
no
yes
yes
no
-3
Final Visual Inspection
Method 2009
yes
yes
yes
Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534.
*883 products are built with element evaluated components and are 100% tested and guaranteed over
the full military temperature range of –55°C to +125°C.
FMSA Rev B 20050522
All technical information is believed to be accurate, but no responsibility is
assumed for errors or omissions. Interpoint reserves the right to make changes in
®
products or specifications without notice. FMSA Series is
Interpoint. Copyright © 1994 - 2005 Interpoint. All rights reserved.
a trademark of
6
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