FM704A [CRANE]
EMI INPUT FILTER AND TRANSIENT SUPPRESSION MODULE, 28 VOLT INPUT; EMI输入滤波器和瞬态抑制模块， 28伏特的输入
| 型号： | FM704A |
| 厂家： | 
Crane Aerospace & Electronics. |
| 描述： | EMI INPUT FILTER AND TRANSIENT SUPPRESSION MODULE, 28 VOLT INPUT |
| 文件： | 总7页 (文件大小：126K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
FEATURES
FM-704A EMI FILTER
40 WATT
EMI INPUT
F
ILTER AND
UPPRESSION
ODULE, 28 VOLT NPUT
• –55°C to +125°C operation
• 16 to 40 VDC input
• Up to 60 dB attenuation
at 500 kHz.
T
RANSIENT
S
• Active transient suppression
• Undervoltage lockout
• Inhibit function
MODEL
M
I
FM-704A
40 Watts
• Compliant to
MIL-STD-461C, CE03
Size (max): 2.910 x 1.125 x 0.400 inches (73.91 x 28.58 x 10.16 mm)
See Section B8, case K1, for dimensions.
Weight:
40 grams maximum
Screening: Standard, ES, or 883 (Class H). See Section C2 for screening
options, see Section A5 for ordering information.
DESCRIPTION
INTERNAL POWER DISSIPATION
Interpoint’s FM-704A™ EMI Filter and Transient Suppression
Module combines EMI filtering and transient protection to handle the
demanding requirements of military, aerospace and industrial appli-
cations. As an EMI filter the FM-704A filter reduces the reflected
ripple current from DC/DC switching converters. As a protection
module, it suppresses input transients on the power bus to protect
the converter and other downstream components.
To keep internal power dissipation to safe operating levels, the input
current should never exceed 2.5 amps at 16 Vin or 1.0 amp at 40
Vin. When the FM-704A filter is used with PWM (Pulse Width
Modulated) converters, I
will vary as Power / V
and 2.5 amps
line
line
maximum at 16 Vin will reduce to approximately 1 amp maximum
at 40 Vin. The maximum value allowed may be less than 1 amp as
determined by line transients and the safe operating area of Figure
9.
MIL-STD NOISE MANAGEMENT
When used in conjunction with Interpoint converters, the FM-704A
EMI filter reduces reflected input ripple current by a minimum of 60
dB at 500 kHz and 55 dB at 1 MHz (see Figures and Electrical
Characteristics table). This attenuation gives the converter/filter
combination performance exceeding MIL-STD-461C’s CE03 test.
Although the FM-704A filter effectively attenuates the ripple gener-
ated by switching converters, it will not suppress RF applied to its
input terminals.
Figure 9 illustrates the maximum allowed internal dissipation for the
FM-704A filter. To calculate watts dissipated, subtract 40 volts from
the transient (VT) to determine the maximum voltage across the
filter and multiply the result by the current (the filter’s output power,
Pout divided by 40).
W = (V - 40) x P /40
T
out
For example, with 20 watts output and a transient of 400 volts:
W = (400 - 40) x 20/40 = 180
The curve of Figure 9 shows that 180 W can be dissipated for up to
4 milliseconds.
TEMPERATURE OPERATION
FM-704A filters are rated to operate from -55°C to +125°C base-
plate temperature. To meet MIL-STD-1275A and MIL-STD-704A
requirements, derate output power linearly from 40 watts at 105°C
to 25 watts at 125°C. See Figure 9.
FEATURES
The inhibit function allows the FM-704A filter to be used as a high-
side switch. When the inhibit terminal (pin 6) is left open or pulled
high, the FM-704A filter is enabled. When the terminal is grounded,
the filter shuts off output power.
PROTECTION
To provide protection for itself and converters, the FM-704A filter
blocks transients as required by the following standards:
A soft start function helps reduce inrush current and start-up over-
shoot when the filter is initially powered or when it is released from
the inhibit mode.
MIL-STD-704A
MIL-STD-461B&C
MIL-STD-1275
Panavia SP-P-90001
British Standard BS3G100
Civil Aircraft D0160B
An undervoltage lockout feature shuts off output power when input
voltage falls below a specified level. Refer to Figure 8 for more infor-
mation.
Refer to the Electrical Characteristics table on the following page for
more information.
Reverse polarity spikes of up to 100 V will not damage the filter,
however the spikes will not be blocked by the filter.
LAYOUT REQUIREMENTS
The case of the filter must be connected to the case of the converter
through a low impedance connection to minimize EMI.
B3-3
FM-704A EMI FILTER
EMI INPUT
F
ILTERS
40 WATT
ABSOLUTE MAXIMUM RATINGS
TYPICAL CHARACTERISTICS
INHIBIT
Inhibit TTL Open Collector
• Logic low (output disabled)
Logic low voltage ≤0.8 V
Input Voltage
Capacitance
• 16 to 40 VDC continuous for 40 W load
Lead Soldering Temperature (10 sec per lead)
• 300°C
Storage Temperature Range (Case)
• –65°C to +150°C
• 0.017 µF max, any pin to case
Undervoltage lockout
• 7 VDC min, 15 VDC max
Isolation
• 100 megohm minimum at 500 V
• Any pin to case, except case pin
Inhibit Pin Voltage (unit enabled)
• 5.5 V max
Logic low inhibit pin current 0.6 mA max
• Referenced to input common
• Logic high (output enabled)
Open collector
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range
• 16 to 40 VDC continuous for 40 W load
Case Operating Temperature (Tc)
• –55°C to +125°C
Derating Output Power
• Linearly from 40 W at 105°C to 25 W at 125°C to meet
MIL-STD-1275A (AT) and MIL-STD-704A
Electrical Characteristics: 25°C Tc, nominal Vin, unless otherwise specified.
FM-704A
PARAMETER
INPUT VOLTAGE
CONDITIONS
NO LOAD
MIN
0
TYP
28
MAX
40
40
15
2.5
1.0
5
UNITS
40 W LOAD
16
7
28
VDC
UNDERVOLTAGE LOCKOUT
—
INPUT CURRENT
16 V
IN
40 V
IN
NO LOAD
INHIBITED
—
—
A
—
—
—
—
mA
—
—
—
2
1
INPUT SURGE
INPUT SPIKE
40 W, 100 V, 0.5 Ω Z , 60 ms
42
48
V
S
OUT
2
40 W, 400 V, 0.5 Ω Z , 5 µs
—
—
48
S
V
OUT
3
40 W, 600 V, 50 Ω Z , 10 µs
—
60
55
—
—
—
—
—
48
—
S
DIFFERENTIAL MODE
NOISE REJECTION
500 kHz
1 MHz
dB
Ω
—
DC RESISTANCE (R
)
Tc = 25°C
0.45
DC
V
= V - I (R
)
DC
OUTPUT VOLTAGE
OUTPUT CURRENT
STEADY STATE
INHIBITED
OUT
IN IN
VDC
—
—
—
—
1
16 V
IN
40 V
IN
2.5
1.0
A
—
—
INTERNAL POWER
DISSIPATION
PEAK
105°C
—
—
—
—
1000
500
125°C
CONTINUOUS ( > 10 SEC.)
105°C
W
—
—
—
—
30
15
125°C
Notes
1. Meets MIL-STD-1275A (AT) Surge and Figure 8 and 9 of MIL-STD-704A. For these standards derate output power linearly from 40 W at 105°C to 25
W at 125°C.
2. Meets Panavia SP-P-90001, British Standard BS3G100 and Civil Aircraft D0160 Standards.
3. Meets MIL-STD-461C 1.2 CS06 limits.
B3-4
FM-704A EMI FILTER
40 WATT
EMI INPUT
F
ILTERS
3.6 H
3.6 H
390 H
Positive
Output
Positive
Input
3300 pF
500V
25 ⍀
6 F
6 F
Case
0.068
F
3300
pF
6600 pF
500V
Oscillator
Inhibit
Output
Common
Input
Common
3300 pF / 500V
FM-704A
15 ⍀
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
PIN OUT
Dot on top of package indicates pin one
Pin
1
Designation
Positive Input
Positive Output
Case Ground
Output Common
Input Common
Inhibit
1
6
2
3
2
BOTTOM VIEW
FM-704A
3
4
5
4
5
6
See Section B8, case K1 for dimensions.
FIGURE 2: PIN OUT
DSCC NUMBER
MODEL NUMBERING KEY
DSCC DRAWING
(5915)
FM-704A FILTER
SIMILAR PART
FM - 704A
Base Model
/
883
94028-01HXC
FM-704A/883
MIL-STD-704A Reference
Screening
For exact specifications for a DSCC product, refer to the
DSCC drawing. See Section A3, “SMD/DSCC Lists”, for
more information.
(Standard screening has no designator
in this position.)
B3-5
FM-704A EMI FILTER
40 WATT
EMI INPUT
F
ILTERS
Typical Performance Curves: 25°C Tc , nominal Vin, unless otherwise specified.
90
90
CE03 Limit
20
70
70
0
50
50
30
10
–20
30
–40
10
–60
-80
.015
.1
1
10
50
10 K
1 M
100 K
FREQUENCY (Hz)
.015
0.1
1
10
50
FREQUENCY (MHz)
FREQUENCY (MHz)
MHF+ Converter With
FM-704A Filter
MHF+ Converter Without Filter
Differential Mode Response
FIGURE 3
FIGURE 4
FIGURE 5
10.00
1.00
0.10
0.01
V
V
in and out
V
in
V
out
0 volts
for V
out
1 K
100 K
10 K
FREQUENCY (Hz)
1 M
100 ms / div.
FM–704A
5 ms / div.
FM–704A
15 watt load
Inrush Current
Typical Output Impedance (Z)
With Input Shorted
FIGURE 7
Undervoltage Lockout
FIGURE 6
FIGURE 8
1000
100
10
0.1
1
10
100
1000
TIME (ms)
Derate power linearly to 50% at 125°C. Operation below this curve
ensures a maximum junction temperature rise of 40°C or less.
Maximum Allowed Internal Power Dissipation
105°C case temperature
FIGURE 9
25021-001-DTS Rev A
DQ# 4001
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. FM-704A is a trademark of Interpoint.
Copyright © 1992 - 1999 Interpoint. All rights reserved.
B3-6
CASE K
CASES
Dot on top of case indicates pin one
CASE K
BOTTOM VIEW
See Figures 42 - 48
for pin configuration
1.125 max
(28.58)
2.910 max
(73.91)
Flange Thickness:
Cases K1, K2, K3 and MLP Series (K5)
0.060 (1.52)
Cases K4, K5 (except MLP Series), K6, K7, and K8
0.067 +0.005/-0.007 (1.70 +0.13/-0.8)
Materials
Header Case K1 - K3
Cold Rolled Steel/Nickel/Gold
Cases K4 - K8
Cold Rolled Steel/Nickel/Tin
Cover Case K1 - K3
Kovar/Nickel
Case K4 - K8
Cold Rolled Steel/Nickel/Tin
Pins
#52 alloy (all cases)
Case K1, K2, and K3 (except MHV Series Single and Dual)
ceramic seal
Cases K4 - K8 and MHV Series Single and Dual (K3)
compression glass seal
Case dimensions in inches (mm)
Tolerance ±0.005 (0.13) for three decimal places
±0.01 (0.2) 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 41: CASE K MAXIMUM DIMENSIONS
B8-26
CASE K
CASES
BOTTOM VIEW CASE K1
Flanged case
FM-704A EMI Filter: Screening – Standard, ES, or 883
Seam Seal
0.040 dia
(1.02)
Dot on top of case indicates pin one
1.110 (28.19)
0.955 (24.26)
1
2
3
0.162 dia
(4.11)
6
0.555 (14.1)
5
4
0.155 (3.94)
0.000
FIGURE 42: CASE K1
BOTTOM VIEW CASE K2
Flanged cases: Designator required in Case Option position of model number.
FMC EMI Filter: Screening – Standard, ES, or 883
SFMC EMI Filter: Screening – Space Standard, H, or K
Seam Seal
0.040 dia
(1.02)
Dot on top of case indicates pin one
1.110 (28.19)
0.955 (24.26)
1
2
3
0.162 dia
(4.11)
0.555 (14.1)
5
4
0.155 (3.94)
0.000
FIGURE 43: CASE K2
B8-27
QA SCREENING
125°C PRODUCTS
125°C PRODUCTS
TEST (125°C Products)
STANDARD
/ES
/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
Method 1010, Cond. B, -55°C to 125°C
no
no
no
yes
yes
no
CONSTANT ACCELERATION
Method 2001, 3000 g
Method 2001, 500 g
no
no
no
yes
yes
no
BURN-IN
Method 1015, 160 hours at 125°C
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
Subgroups 1 and 4: +25°C case
no
yes
no
yes
yes
no
HERMETICITY TESTING
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.
Applies to the following products
MOR Series
MFLHP Series
MFL Series
MHP Series
MTR Series
MQO Series**
MHD Series
MHV Series
MHF+ Series
MHF Series**
MGA Series
MSA Series
MGH Series
MCH Series
FM-704A EMI Filter
FMD**/FME EMI Filter
FMC EMI Filter
FMH EMI Filter
FMGA EMI Filter
FMSA EMI Filter
HUM Modules**
LCM Modules**
LIM Modules
**MFLHP Series, MQO Series, MHF Series, FMD EMI Filters, Hum Modules, and LCM Modules do not offer
‘883” screening.
C2-10
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