Crane Aerospace & Electronics Power Solutions
MHF+ Single, Dual and Triple DC/DC Converters
28 VOLT INPUT – 15 WATT
OPERATING CONDITIONS AND CHARACTERISTICS
Input Voltage Range
Single and dual models:
• 16 to 40 VDC continuous
• 50 V for up to 50 msec transient
Triple models:
• 16 to 48 VDC continuous
• 80 V for up to 120 msec
Output Power
• 12 to 15 watts depending on model
Power Dissipation (Pd)
• 6 watts single and dual, 12 watts triple
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
• –55°C 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
• 150 ppm/°C maximum
Input to Output Capacitance
• 60 pF typical
Current Limit
• 115% of full load typical (130% typical triple)
Isolation
• 100 megohm minimum at 500 V
Audio Rejection
• 50 dB typical
Conversion Frequency (55°C to +125°C Tc)
• Free run 550 kHz typical (375 minimum, 500 kHz maximum triple)
• External sync range 480 kHz min, 620 kHz max(400 to 600 kHz triple)
Inhibit Pin Voltage (unit enabled)
• 8.5 to 12 V, 10 V typical
Undervoltage Lockout
• 14 V input typical
SYNC AND INHIBIT
Sync In (500 to 600 kHz single and dual, 400 to 600 kHz
triple)
• Duty cycle 40% to 60%
• Logic low 0.8 V max
• Logic high 4 V min, 5 V max
• If not used, connect to input common (on triple models,
leave unconnected)
• Referenced to input common
Sync Out - Referenced to input common
Inhibit: TTL Open Collector
• Logic low (output disabled)
Logic low voltage ≤0.8 V max
Inhibit pin current 4.0 mA max
(3.0 typ, 5.0 max triple models)
• Referenced to input common
Logic high (output enabled)
Open collector or unconnected (single and dual)
Unconnected or 11 to 40 V (triple)
MECHANICAL AND ENVIRONMENTAL
Size (maximum)
Non flanged 1.460 x 1.130 x 0.330 (37.08 x 28.70 x 8.38 mm)
Flanged 2.005 x 1.130 x 0.330 (50.93 x 28.70 x 8.38 mm)
See cases E1, E2, G1 and G2 for dimensions.
Weight (maximum)
Single and dual models: 30 grams typical
Triple models: 32 grams typical
Screening
Standard, ES or 883 (Class H). See “883, Class H, QML
Products – Element Evaluation” and “883, Class H, QML
Products – Environmental Screening” for more information.
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Rev K - 20060613
CRANE [ Crane Aerospace & Electronics. ]
