sFcs28-461 eMi input Filters

Crane Aerospace & Electronics Power Solutions
SFCS28-461 EMI Input Filters
28 Volt input – 5 AMP
Features
Attenuation 70 dB at 500 kHz
• Operating temperature -55° to +125°C
• Qualified to MIL-PRF-38534 Class H and K
• Passive components used for maximum tolerance
in space environments
• Nominal 28 V input, 0 V to 50 V operation
• Up to 5 A throughput current
• Compliant to MIL-STD-461C CE-03
• Compatible with MIL-STD-704 A-E 28 VDC power bus
Input Voltage
and Current
Model
SFCS28-461
description
The Interpoint™ SFCS28-461TM EMI Filter modules are
specifically designed to reduce the reflected input ripple current
of high frequency DC/DC converters. SFCS28-461 filters
minimize electromagnetic interference (EMI) for Interpoint
space application converters. These filters are intended for use
in 28 volt applications which must meet MIL-STD-461 levels
of conducted emissions. One filter can be used with multiple
converters up to the rated throughput current of the filter.
Screening
The SFCS28-461 filter offers three screening options - Space
Prototype (O), Class H, or Class K. Radiation tolerant to
Radiation Hardness Assurance (RHA) levels of “-” (O) or “H”,
per MIL-PRF-38534. Interpoint model numbers use an “O” in
the RHA designator position to indicate the “-” (dash) Radiation
Hardness Assurance level of MIL-PRF-38534, which is defined
as “no RHA”. See “Screening Table 2: Environmental Screening”
tables for more information.
Input Ripple and EMI
Switching DC/DC converters naturally generate two noise
components on the power input line: differential noise and
common mode noise. Input ripple current refers to both of these
components.
Differential noise occurs between the positive input and input
common. Most Interpoint converters have an input filter that
reduces differential noise which is sufficient for most applications.
Crane Aerospace & Electronics
Power Solutions – Interpoint Products
10301 Willows Rd NE, Redmond, WA 98052
+1.425.882.3100 • [email protected]
www.craneae.com/interpoint
Current (A)
5
Common mode noise occurs across stray capacitance between
the converter’s power train components and the baseplate
(bottom of the package) of the converter.
Where low noise currents are required to meet CE03 of
MIL-STD-461C, a power line filter is needed. The SFCS28-461
Series of EMI power line filters reduces the common mode and
differential noise generated by the converters. SFCS28-461 filters
reduce input ripple current by at least 60 dB at 500 kHz, 1 MHz,
and 5 MHz when used in conjunction with Interpoint DC/DC
converters. The filter must be placed as close as possible to the
converter for optimum performance. the baseplates of the filter
and the converter should be connected with the shortest and
widest possible conductors. For the best connection, mount the
filter’s and converter’s baseplates on or above a small ground
plane.
Operation and Temperature
All SFCS28-461 filters are rated for full power operation from
-55˚C to +125˚C case temperature. Current is derated linearly to
zero at +135˚C case temperature.
Insertion Loss
The maximum DC insertion loss at full load and nominal input
voltage represents a power loss of less than 4%.
Packaging
SFCS28-461 filters are sealed in metal hermetic side-leaded
packages. For more information contact your Interpoint
representative.
Page 1 of 9
SFCS Rev D - 2011.11.07
Cleared by the U.S. Department of Defense (DoD) Office of Security Review (OSR)
for public release. OSR case number 11-S-3519, dated September 26, 2011.
Crane Aerospace & Electronics Power Solutions
SFCS28-461 EMI Input Filters
28 Volt input – 5 AMP
Operating Conditions and characteristics
mechanical and environmental
Input Voltage Range
•0 to 50 VDC continuous for 28 V models
Size (maximum)
•3.005 x 1.505 x 0.400 inches (76.33 x 38.23 x 10.16 mm).
Case U has straight, short leads. Case V has longer leads,
bent down.
Lead Soldering Temperature (10 sec per pin)
•300°C
Weight (maximum)
•110 grams maximum
Storage Temperature Range (Case)
•-65°C to +150°C
Screening
•Space Prototype (O), Class H, or Class K
•Radiation tolerant to Radiation Hardness Assurance (RHA)
levels of “-” (O) or “H”, per MIL-STD-38534. Interpoint
model numbers use an “O” in the RHA designator position
to indicate the “-” (dash) Radiation Hardness Assurance
level of MIL-PRF-38534, which is defined as “no RHA”.
•See Screening Tables 1 and 2 for more information.
Available configurations: OO, HH, KH
Case Operating Temperature (Tc)
•-55˚C to +125˚C full power
•-55˚C to +135˚C absolute
Derating Output Current
•Derate linearly from 100% at 125˚C to 0% at 135˚C case
Isolation
•100 megohm minimum at 500 VDC
•Any pin to case
Positive
Input
100 H
17 H
100 H
17 H
6 F
50 V
17 H
6 F
50 V
Positive
Output
6 F
50 V
3.2 
Output
Common
Input
Common
.015 F
500 V
.015 F
500 V
.015 F
500 V
SFCS28-461
Figure 1: Schematic
www.craneae.com/interpoint
Page 2 of 9
SFCS Rev D - 2011.11.07
.015 F
500 V
Crane Aerospace & Electronics Power Solutions
SFCS28-461 EMI Input Filters
28 Volt input – 5 AMP
Pin
1
PIN OUT
Designation
1, 2, 3
Positive Input
7, 8, 9
Output Common
4, 5, 6
Input Common
10, 11, 12
Baseplate
Positive Output
Case Ground
2
Notes
1. All pins must be connected.
2.The baseplate is the only case ground connection and should
directly contact chassis ground.
Angled corner indicates pin one.
1
TOP VIEW
(Pin side, marked side)
2
3
4
5
11
Case U
(See case U and V for dimensions.)
6
10
9
8
7
Figure 2: Pin Out SFCS28-461
www.craneae.com/interpoint
12
Page 3 of 9
SFCS Rev D - 2011.11.07
Crane Aerospace & Electronics Power Solutions
SFCS28-461 EMI Input Filters
28 Volt input – 5 AMP
model numbering key
Base Model
SFCS
DLA Numbers
DLA Drawing (5915)
28 – 461 V / K H
Input Voltage
MIL-STD-461 Compliant
SFCS28-461
Similar Part
00003-01HXC
SFCS28-461/HH
00003-01KXC
SFCS28-461/KH
For exact specifications for a DLA product, refer to the
DLA drawing. DLA drawings can be downloaded from:
http://www.landandmaritime.dla.mil/Programs/MilSpec/
default.aspx
Case Option
(Standard case has no designator in this position)
Screening
Radiation Level
model Number Options 1
To determine the model number
enter one option from each category in the form below.
Category
Base Model and
Input Voltage
Options
SFCS28-461
Fill in for
model #
SFCS28-461
__________
Case Option 2
Screening 3
RHA 4
(side-leaded case, leave blank)
O
O
V (leads bent down)
H
H
K
/
_______
Notes:
1. See Model Numbering Key above for an example of a model number.
2. Case Options: For the standard case, Case U, leave the case option blank. For Case V with leads bent down, insert the
letter V in the Case Option position.
3. Screening: A screening level of O is a Space Prototype and is only used with RHA O. See Screening Tables 1 and 2 for
more information. “H” indicates Class H and “K” indicates Class K of MIL-PRF-38534.
4. RHA: Interpoint model numbers use an “O” in the RHA designator position to indicate the “-” (dash) Radiation Hardness
Assurance level of MIL-PRF-38534, which is defined as “no RHA.” RHA O is only available with Screening level O. See
Screening Table 2 for more information.
www.craneae.com/interpoint
Page 4 of 9
SFCS Rev D - 2011.11.07
Crane Aerospace & Electronics Power Solutions
SFCS28-461 EMI Input Filters
28 Volt input – 5 AMP
Electrical Characteristics: -55 TO +125°C TC, nominal Vin, unless otherwise specified.
SFCS28-461
UNITS
PARAMETER
CONDITIONS
MIN
TYP
MAX
INPUT VOLTAGE
CONTINUOUS
TRANSIENT 100 ms 1, 2, 3
0
28
50 1
VDC
—
—
100
V
500 kHz
60
70
—
1 MHz
60
70
—
dB
5 MHz
60
70
MAX CURRENT
TC = 25°C
—
—
51
W
—
—
0.2
ohms
50
60
70
nF
NOISE REJECTION
POWER DISSIPATION
DC RESISTANCE (RDC)
CAPACITANCE TC = 25°C
OUTPUT VOLTAGE
OUTPUT
CURRENT1
TC = 25°C @ 1 A
ANY PIN TO CASE
STEADY STATE
VOUT = VIN - IIN(RDC)
STEADY STATE
1
—
—
5
Notes
1.Guaranteed by design, not tested.
2.28 V = 0.5 Ω source impedance.
3. The filter will not be damaged by a 100 volt transient but the transient will be passed on to
the converter.
www.craneae.com/interpoint
Page 5 of 9
SFCS Rev D - 2011.11.07
VDC
A
Crane Aerospace & Electronics Power Solutions
SFCS28-461 EMI Input Filter Cases
28 Volt input – 5 AMP
TOP VIEW CASE U*
Flanged case, short-leaded
*Does not require designator in Case Option position of model number.
1.505 (38.23) max.
2
11
0.850 (21.59)
3
10
0.650 (16.51)
4
9
0.450 (11.43)
5
8
0.250 (6.35)
6
7
0.000
0.120 (3.05)
0.000
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.
Materials
Header
Cold Rolled Steel/Nickel/Gold
Cover
Kovar/Nickel
Pins
#52 alloy/Gold, compression glass seal
Seal Hole: 0.100 ±0.002 (2.54 ±0.05)
Case U, Rev F, 20100503
Figure 32: Case U
www.craneae.com/interpoint
Page 6 of 9
SFCS Rev D - 2011.11.07
0.220 (5.59
1.050 (26.67)
0.040 dia
(1.02)
0.050 (1.27)
0.000
12
2.750 (69.85)
1
0.120 (3.05)
0.250 (6.35)
1.250 (31.75)
2.880 (73.15)
3.005 (76.33) max.
1.380 (35.05)
Seam Seal
0.128 dia
(3.25).
0.23 (5.8) Pin Length
0.400 (10.16) max.
Angled corner
indicates pin one.
Crane Aerospace & Electronics Power Solutions
SFCS28-461 EMI Input Filter Cases
28 Volt input – 5 AMP
TOP VIEW CASE V*
Flanged case, down leaded
*Designator "V" required in Case Option position of model number.
Maximum dimensions: 3.005 x 1.505 (76.33 x 38.23 mm)
Angled corner
indicates pin one.
3.45 (87.6) Reference
(lead center to lead center)
0.128 dia
(3.25)
0.040 dia
(1.02)
1.380 (35.05)
1.250 (31.75)
12
1
1.050 (26.67)
11
2
0.850 (21.59)
10
3
0.650 (16.51)
9
4
0.450 (11.43)
8
5
0.250 (6.35)
7
6
0.120 (3.05)
Seam 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.
Materials
Header
Cold Rolled Steel/Nickel/Gold
Cover
Kovar/Nickel
Pins
#52 alloy/Gold, compresssion glas seal
Seal Hole: 0.120 ±0.002 (3.05 ±0.05)
Case V, Rev F, 2010624
Please refer to the numerical dimensions for accuracy.
Figure 33: Case V
www.craneae.com/interpoint
Page 7 of 9
SFCS Rev D - 2011.11.07
ref: 0.250 ±0.050
(6.35 ±1.27)
0.050 (1.27)
0.000
0.220 (5.59)
0.400 (10.16) max
2.880 (73.15)
3.005 (76.33) max
2.750 (69.85)
0.250 ±0.010
(6.35 ±0.3)
0.000
0.120 (3.05)
ref: 0.225 (5.72
0.000
Crane Aerospace & Electronics Power Solutions
SFCS28-461 EMI Input Filters
28 Volt input – 5 AMP
emi FiLterS PrototyPe, CLASS h AnD CLASS K,
miL-PrF-38534 eLement eVALuAtion
non-QmL 1
PrototyPe
ComPonent-LeVeL teSt PerFormeD
Element Electrical
/o
QmL
CLASS h
m/S 2
m/S 2

/h
CLASS K
P3
m/S 2
/K
P3




Visual




Internal Visual


Temperature Cycling


Constant Acceleration


Interim Electrical

Burn-in

Post Burn-in Electrical

Steady State Life

Voltage Conditioning Aging

Visual Inspection

Final Electrical


SEM



Notes:
1. Non-QML products may not meet all of the requirements of MIL-PRF-38534.
2. M/S = Active components (Microcircuit and Semiconductor Die)
3. P = Passive components, Class H and K element evaluation. Not applicable to Space Prototype (“O”) element evaluation.
Definitions:
Element Evaluation: Component testing/screening per MIL-STD-883 as determined by MIL-PRF-38534
SEM: Scanning Electron Microscopy
Screening Table 1: Element Evaluation
Screening table 2: eleMent eValuatiOn—eMi FilterS prOtOtYpe, claSS h and claSS k
www.craneae.com/interpoint
Page 8 of 9
SFCS Rev D - 2011.11.07
Crane Aerospace & Electronics Power Solutions
SFCS28-461 EMI Input Filters
28 Volt input – 5 AMP
emi FiLterS PrototyPe, CLASS h AnD CLASS K,
miL-PrF-38534 enVironmentAL SCreening AnD rhA1
non-QMl 2
teSt PerFormeD
CLASS h
CLASS K








/oo
pre-cap inspection, Method 2017, 2032
QmL 3
/hh
4
/Kh 4
temperature cycle (10 times)
Method 1010, Cond. C, -65°C to +150°C, ambient
constant acceleration
Method 2001, 3000 g (Qual 5000 g)
pind, test Method 2020, cond. a

pre burn-in test, group a, subgroups 1 and 4
Burn-in Method 1015, +125°c case, typical



5


6
96 hours

160 hours

2 x 160 hours (includes mid-BI test)

Final electrical test, Mil-prF-38534, group a,
Subgroups 1 and 4: +25°C case

Subgroups 1 through 6, -55°C, +25°C, +125°C case


Hermeticity test
Gross Leak, Method 1014



Fine Leak, Method 1014



radiography, Method 2012

post radiography electrical test, +25°c case
5
Final visual inspection, Method 2009

radiation tolerant–
Tested lots up to 1,000 krad(Si) total dose, applies
to EMI filters only




Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534.
Notes:
1. Our Redmond site has a DLA approved RHA plan for Interpoint
power products.
2. “OO” prototypes are non-QML products and may not meet all of
the requirements of MIL-PRF-38534. “O” in the RHA designator
position in Interpoint model numbers indicates DLA RHA “-” defined
as no RHA.
3. All processes are QML qualified and performed by certified
operators.
4. Our EMI filters are designed exclusively with passive components
providing maximum tolerance for space environment requirements.
5. Not required by DLA but performed to assure product quality.
6. Burn-in temperature designed to bring the case temperature to
+125°C minimum. Burn-in is a powered test.
Screening Table 2: Environmental Screening
Screening table 5: enVirOnMental Screening and rha—eMi FilterS prOtOtYpe, claSS h and claSS k
SCFS28-461 EMI Input Filters, SFCS Rev D - 2011.11.07. This revision supersedes all previous releases. All technical information is believed to be
accurate, but no responsibility is assumed for errors or omissions. Crane Electronics, Inc. reserves the right to make changes in products or specifications without notice. Interpoint and SFCS28-461 are trademarks of Crane Electronics, Inc. Copyright © 1999 - 2011 Crane Electronics, Inc. All rights
reserved. www.craneae.com/interpoint
Page 9 of 9