Crane Aerospace & Electronics Power Solutions
sMFL single and dual dc/dc converters
28 VoLt input – 65 Watt
input Voltage range
• 16 to 40 VDC continuous
• 50 V for 120 ms transient
output power
• 40 to 65 watts depending on model
Lead soldering temperature (10 sec per lead)
• 300°C
storage temperature range (case)
• –65°C to +150°C
power dissipation (pd)
• 14 watts (16 watts SMFL2805S, SMFL2805D)
case operating temperature (tc)
• –55°C to +125°C full power
derate output power/current
• MFL283R3S: linearly from 100% at 100 °C to 80% at 125 °C
output Voltage temperature coefficient
• 100 ppm/°C typical
input to output capacitance
• 150 pF, typical
current Limit
• 125% of full load typical
isolation
• 100 megohm minimum at 500 V
audio rejection
• 50 dB typical
conversion Frequency (-55°c to 125°c)
• Free run mode 600 kHz typical
525 kHz. min, 675 kHz max
inhibit pin Voltage (unit enabled)
• INH1 = 9 to12 V, INH2 = 6 to 9 V
OPERATING CONDITIONS AND ChARACTERISTICS
SyNC IN AND INhIbIT (INh1, INh2)
sync in (525 to 675 kHz)
• Duty cycle 40% min, 60% max
• Logic low 0.8 V max
• Logic high 4.5 V min, 5 V max
• Referenced to input common
sync out
• Referenced to input common
inhibit (inH1, inH2) ttL open collector
• Logic low (output disabled)
INH1 referenced to input common
Logic low 0.8 V max
Inhibit pin current 10 mA max
INH2 referenced to output common
Logic low 0.5 V max
Inhibit pin current 5 mA max
• Logic high (output enabled)
Open collector
MEChANICAL AND ENvIRONMENTAL
size (maximum)
3.005 x 1.505 x 0.400 inches (76.33 x 38.23 x 10.16 mm)
See case U for dimensions.
Case options V, W, Y, and Z are available by special order.
Weight (maximum)
86 grams
screening
Space Prototype (O), Class H, or Class K
Radiation tolerant to Radiation Hardness Assurance (RHA) levels of “-” (O) or “R”, 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 “Class H and K, QML Screening” tables for more information.
Available configurations: OO, HO, HR, KR
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