Crane Aerospace & Electronics Power Solutions
MTR Single, Dual and Triple DC/DC Converters
28 VOLT INPUT – 30 WATT
OPERATING CONDITIONS AND CHARACTERISTICS
Input Voltage
• 16 to 40 VDC continuous
• 50 V for 50 msec transient
Output Power
• 25 to 30 watts depending on model
Lead Soldering Temperature (10 sec per pin)
• 300°C
Storage Temperature Range (Case)
• –65°C to +135°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 single and dual outputs
• 200 ppm/°C main typical, 300 ppm/°C aux
triple output typical
Input to Output Capacitance
• 50 pF typ (100 pF typical triple outputs)
Current Limit
• 115% of full load typical
Isolation
• 100 megohm minimum at 500 V
Audio Rejection
• 40 dB typ (50 dB typical triple output)l
Conversion Frequency
• Free run 550 min, 600 typical, 650 max kHz duals and singles
Free run 525 min, 600 typical, 650 max kHz triples
• External sync 500 to 675 kHz singles and duals
External sync 500 to 700 kHz triples
SYNC AND INHIBIT
Sync (500 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
Inhibit TTL Open Collector (referenced to input common)
• Logic low (output disabled), ≤0.8 V
Inhibit pin current
8.0 mA max for singles & duals,
6.0 mA for triples
• Logic high (output enabled)
Input pin voltage, unit enabled, 9 to 11 V
MECHANICAL AND ENVIRONMENTAL
Size (maximum)
Non-flanged
Single and dual output
2.125 x 1.125 x 0.400 inches (53.98 x 28.58 x 10.16 mm) See case H2 for dimensions.
MTR Dual with standard or ES screening, ht 0.417", (10.59 mm) See Case H4 for dimensions.
1.950 x 1.350 x 0.405 inches (49.53 x 34.29 x 10.29 mm) See case F1 for dimensions.
Triple output
Flanged
Single and dual output
2.910 x 1.125 x 0.400 inches (73.91 x 28.58 x 10.16 mm) See case K3 for dimensions.
MTR Dual with standard or ES screening, ht. 0.417", (10.59 mm) See case K5 for dimensions.
2.720 x 1.350 x 0.405 inches (69.09 x 34.29 x 10.29 mm) See case J1 for dimensions.
Triple output
Weight (maximum)
Single and dual non-flanged 50 grams, flanged 52 grams
Triple non-flanged 58 grams, flanged 62 grams
Screening
Standard, ES, or /883 (Class H, QML). See “883, Class H, QML Products – Element Evaluation” and “883, Class H, QML Products – Environmental
Screening” for more information.
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Rev G - 20060505
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