Crane Aerospace & Electronics Power Solutions
SMFLHP Single and Dual DC/DC Converters
28 VOLT INPUT – 100 WATT
OPERATING CONDITIONS AND CHARACTERISTICS
Input Voltage Range
• 19 to 40 VDC continuous
• 50 V for 50 msec transient
Output Power
• up to 100 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)
• 20 watts
Case Operating Temperature (Tc)
• –55 to +125°C full power
• –55 to +135°C absolute
Derating Output Power/Current
• Linearly from 100% at 125°C to 0% at 135°C
Output Voltage Temperature Coefficient
• 100 ppm/°C typical
Input to Output Capacitance
• 150 pF typical
Isolation
• 100 megohm minimum at 500 VDC, any pin to case
Audio Rejection
• 50 dB typical
Conversion Frequency
• Free run mode 600 kHz typical
550 kHz min, 650 kHz. max
• External sync range 525 to 675 kHz
Inhibit Pin Voltage (unit enabled)
• INH1 = 9 to12 V, INH2 = 6 to 9 V
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
• If not used, connect to input common
Sync Out
• Referenced to input common
Inhibit (INH1, INH2) Open Collector
• Logic low (output disabled)
Current –10 to –5 mA
INH1 referenced to input common
Logic low 0.8 V max
INH2 referenced to output common
Logic low 0.5 V 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.
Weight (maximum)
86 grams
Screening
Space Prototype (O), Class H, or Class K Radiation tolerant to Radiation Hardness Assurance (RHA) levels of “-” (O), “P” 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, HP, HR, KR
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Rev H - 20071221
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