Crane Aerospace & Electronics Power Solutions
FM-704A EMI Input Filter and Transient Suppression Module
OPERATING CONDITIONS AND CHARACTERISTICS
Input Voltage Range
• 16 to 40 VDC continuous for 40 W load
Lead Soldering Temperature (10 sec per pin)
• 300°C
Storage Temperature Range (Case)
• –65°C to +150°C
Case Operating Temperature (Tc)
• –55°C to +125°C full power
Derating Output Power/Current
• Linearly from 40 W at 105°C to 25 W at 125°C to meet
MIL-STD-1275A (AT) and MIL-STD-704A
Capacitance
• 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
INHIBIT TTL OPEN COLLECTOR
• Logic low (output disabled)
Logic low voltage
≤0.8
V
Logic low inhibit pin current 0.6 mA max
• Referenced to input common
• Logic high (output enabled)
Open collector
MECHANICAL AND ENVIRONMENTAL
Size (maximum)
2.910 x 1.125 x 0.400 inches (73.91 x 28.58 x 10.16 mm)
See case K1 for dimensions.
Weight (maximum)
40 grams typical
Screening
Standard, ES, or 883 (Class H). See “QA Screening: /883 (Class H, QML)” for
more information.
Positive
Input
25
3300
pF
Inhibit
Input
Common
Oscillator
390 H
3.6 H
3.6 H
Positive
Output
3300 pF
500V
0.068
F
6 F
6 F
Case
6600 pF
500V
Output
Common
3300 pF / 500V
15
FM-704A
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.
F
IGURE
1: S
CHEMATIC
– T
YPICAL
V
ALUES
www.craneae.com
Page 2 of 8
Rev B - 20060125
SPI [ SPARKLE POWER INC. ]
