MCH/MGH Single and Dual DC/DC Converters
Page 3 of 18
Rev E - 20060508
28 VOLT INPUT – 1.5 WATT
Crane Aerospace & Electronics Power Solutions
www.craneae.com
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
INPUT
INHIBIT
FB
SHUTDOWN
PWM
CONTROLLER
INPUT
COMMON
+VIN
+VOUT
+
DUAL MODELS ONLY
NEGATIVE
OUTPUT
COMMON
POSITIVE
OUTPUT
3
4
6
1
7
2
0.47 μF
typical
FIGURE 2: MCH BLOCK DIAGRAM