Crane Aerospace & Electronics Power Solutions
MCH/MGH Single and Dual DC/DC Converters
28 VOLT INPUT – 1.5 WATT
OPERATING CONDITIONS AND CHARACTERISTICS
Input Voltage Range
• 12 to 50 VDC continuous
• 80 V for 120 msec transient
(70 V for 15 V single and dual models)
Output Power
• 1.5 W
Capacitive Load
• 200 μF single output models
• 100 μF each output, dual output models
Lead Soldering Temperature
• Reflow 220°C 30 sec. max
SN60, 62 or 63 recommended solder
• Hand solder 300°C 10 sec. max per lead
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
Input to Output Capacitance
• 100 to 170 pF typical
Current Limit
• 125% of full load typical
Isolation
• 100 megohm minimum at 500 V
Audio Rejection
• 40 dB typical
Conversion Frequency (kHz)
• 25°C
300 min, 370 typ, 450 max
• –55°C to +125°C
270 min, 370 typ, 470 max
Inhibit Pin Voltage (unit enabled)
• 7 to 12 V
Undervoltage Lockout
• 8 V input typical
INHIBIT
Inhibit – TTL Open Collector
• Logic low (output disabled)
Logic low voltage ≤0.8 V
Inhibit pin current 1 mA max
• Referenced to input common
• Logic high (output enabled) open collector
MECHANICAL AND ENVIRONMENTAL
Size (maximum)
MCH models 0.980 x 0.805 x 0.270 inches (24.89 x 20.45 x 6.86 mm)
See case A2 for dimensions.
MGH models 1.010 x 0.880 x 0.250 inches (25.65 x 22.35 x 6.35 mm)
Shown on page one with “gull wing” lead option, also available with
straight leads. See case B for dimensions and options.
Weight (maximum)
12 grams typical
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.
POSITIVE 1
INPUT
+
0.47
μF
typical
+V
IN
FB
+
3 POSITIVE
OUTPUT
INHIBIT
7
SHUTDOWN
PWM
CONTROLLER
+V
OUT
+
4 OUTPUT
COMMON
6 NEGATIVE
OUTPUT
DUAL MODELS ONLY
INPUT
COMMON
2
F
IGURE
2: MCH B
LOCK
D
IAGRAM
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Rev E - 20060508
CRANE [ Crane Aerospace & Electronics. ]
