MHE SERIES
20 WATT
ABSOLUTE MAXIMUM RATINGS
Output Power
• 10 to 20 watts depending on model
Lead Soldering Temperature (10 sec per lead)
• 300°C
Storage Temperature Range (Case)
• –55°C to +125°C
DC/DC C
ONVERTERS
INHIBIT
Inhibit TTL Open Collector
• Logic low (output disabled)
Logic low voltage
≤0.8
V
• Referenced to input common
• Logic high (output enabled)
Open collector
TYPICAL CHARACTERISTICS
Output Voltage Temperature Coefficient
• 150 ppm/°C, typical
Input to Output Capacitance
• 60 pF, typical
Current Limit
• 125% of full load, typical
Isolation
• 100 megohm minimum at 500 V
Conversion Frequency
• 125 kHz, typical
Inhibit Pin Voltage (unit enabled)
• 11 to 13 V MHE28XXX
• 8 to 10 V MHE12XXX
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range
Continuous
• 17 to 40 VDC MHE28XXX
• 10 to 16 VDC MHE12XXX
Transient
• 50 V for 50 msec on 28 V input models
Case Operating Temperature (Tc)
• –55°C to +85°C full power
Derating Output Power/Current
• Linearly from 100% at 85°C to 0% at 115° C
• MHE28XXX models derate by 33% at 16 Vin
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
SINGLE OUTPUT MHE12XX MODELS
PARAMETER
OUTPUT VOLTAGE
OUTPUT CURRENT
OUTPUT POWER
OUTPUT RIPPLE
VOLTAGE
LINE REGULATION
LOAD REGULATION
INPUT VOLTAGE
INPUT CURRENT
INPUT RIPPLE
CURRENT
EFFICIENCY
CONDITION
–55°C TO +85°C
–55°C TO +85°C
0 TO 1 MHz
V
IN
MIN TO MAX
NO LOAD TO FULL
CONTINUOUS
TRANSIENT 50 ms
NO LOAD
10 kHz – 2 MHz
MIN
4.95
—
—
—
—
—
10
—
—
—
78
MHE1205S
TYP
5.00
—
—
35
2
10
12
—
—
30
81
MAX
5.05
3
15
70
5
20
16
—
24
80
—
MIN
11.88
—
—
—
—
—
10
—
—
—
79
MHE1212S
TYP
12.00
—
—
35
3
5
12
—
—
30
82
MAX
12.12
1.25
15
70
10
15
16
—
32
80
—
MHE1215S
MIN
14.85
—
—
—
—
—
10
—
—
—
80
TYP
15.00
—
—
35
3
10
12
—
—
30
83
MAX UNITS
15.15 VDC
1.0
A
15
70
10
20
16
—
32
80
—
W
mV p-p
mV
mV
VDC
V
mA
mA p-p
%
Note:
1. Guaranteed by design, not tested.
2
CRANE [ Crane Aerospace & Electronics. ]
