SMHF282R5S Datasheet, PDF (3/15 Pages) Interpoint Corporation Company – Fully qualified to Class H or K -55°C to +125°C operation 16 to 40 VDC input

Crane Aerospace & Electronics Power Solutions
SMHF Single and Dual DC/DC Converters
28 Volt input – 15 Watt
Operating Conditions and characteristics
Input Voltage Range
• 16 to 40 VDC continuous
• 50 V for up to 50 msec transient
Power Dissipation (Pd)
•8W
Output Power
• up to 15 watts depending on model
Lead Soldering Temperature (10 sec per lead)
• 300°C
Storage Temperature Range (Case)
• -65°C to +150°C
Case Operating Temperature (Tc)
• -55°C to +125°C full power
• -55°C to +135°C absolute
Derating Output Power/Current (Tc)
• Linearly from 100% at 125°C to 0% at 135°C
Output Voltage Temperature Coefficient
• 100 ppm /°C typical
• 150 ppm/°C maximum
Input to Output Capacitance
• 60 pF typical
Current Limit
• 115% of full load typical
Isolation
• 100 megohm minimum at 500 VDC
• Any pin to case, except case pin
Audio Rejection
• 50 dB typical
Conversion Frequency (º55°C to +125°C Tc)
• Free run 550 kHz typical
480 kHz min, 620 kHz max
Inhibit Pin Voltage (unit enabled)
• 8.5 to 12 V
Undervoltage Lockout
• 14 V input typical
Sync and inhibit
Sync In (500 to 600 kHz)
• Duty cycle 40% to 60%
• 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
Inhibit TTL Open Collector
• Logic low (output disabled)
Logic low voltage ≤0.8 V max
Inhibit pin current 12 mA max
• Referenced to input common
• Logic high (output enabled)
Open collector or unconnected
mechanical and environmental
Size (maximum)
Non flanged
1.460 x 1.130 x 0.330 (37.08 x 28.70 x 8.38 mm). See case E1 for dimensions.
Flanged
2.005 x 1.130 x 0.330 (50.93 x 28.70 x 8.38 mm). See case G1 for dimensions.
Weight (maximum)
30 grams typical
Screening
Space Prototype, 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, MIL-PRF-38534 Screening” tables for more information.
Available configurations: OO, HO, HR, KR
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Rev D - 20070404