DC/DC C
ONVERTERS
DUAL OUTPUT MODELS
PARAMETER
OUTPUT VOLTAGE
CONDITION
+V
OUT
– V
OUT
OUTPUT CURRENT
1, 2
OUTPUT POWER
2
+V
OUT
– V
OUT
TOTAL
OUTPUT RIPPLE
VOLTAGE
LINE REGULATION
MIN. TO MAX. V
IN
LOAD REGULATION
NO LOAD TO FULL
CROSS REGULATION
+V
OUT
20% TO 80% LOAD
3
50% LOAD
4
INPUT VOLTAGE
NO LOAD TO FULL
INPUT CURRENT
CONTINUOUS
TRANSIENT 50 ms
NO LOAD
FULL LOAD
INHIBITED
10 kHz TO 2 MHz
—
—
—
16
—
—
—
—
—
78
POWER DISSIPATION
SHORT CIRCUIT
OVERLOAD
START-UP
DELAY
—
—
—
—
—
150
2.8
5
250
—
—
—
—
—
150
2
5
250
ms
W
5
5
4
28
—
25
—
1.9
175
81
50
10
5
40
50
35
550
3
240
—
—
—
—
19
—
—
—
—
—
80
10
4
3
28
—
25
—
1.9
175
83
50
8
5
40
50
35
536
3
240
—
VDC
V
mA
mV
%
+V
OUT
—
5
50
—
5
50
mV
10 kHz TO 2 MHz
MIN
11.88
11.82
—
—
—
—
—
MHF2812D
TYP
MAX
12.0
12.0
0.5
—
—
—
30
12.12
12.18
1.0
10.8
10.8
12
60
MIN
MHF2815D
TYP
MAX
15.0
15.0
0.4
—
—
—
30
15.15
15.23
0.8
10.8
10.8
12
60
mV p-p
W
A
UNITS
VDC
14.85
14.77
—
—
—
—
—
MHF SERIES
12 WATT
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
INPUT RIPPLE
CURRENT
EFFICIENCY
LOAD FAULT
5
mA p-p
%
Notes
1. Applies to both outputs.
2. Maximum combined output power is 12 watts. A maximum of 90% is avail-
able from either output.
3. 20% to 80% load on the positive output and 80% to 20% on the negative
output. See Figure 8.
4. 50% load on the positive output and 50% to 20% load on the negative output.
50% load on the negative output and 50% to 20% load on the positive output.
See Figure 7.
5. Indefinite short circuit protection not guaranteed above 125°C case temper-
ature.
PIN OUT
Pin
1
2
3
4
5
6
7
8
Single Output
Inhibit
No connection
Output Common
Positive Output
No connection
Case Ground
Input Common
Positive Input
Dual Output
Inhibit
Positive Output
Output Common
Negative Output
No connection
Case Ground
Input Common
Positive Input
Squared corner and dot on
top of cover indicate pin one.
MODEL NUMBER KEY
MHF
Base Model
Input Voltage
Output Voltage
Number of Outputs
(S = single, D = dual)
Screening
(Standard screening has no designator
in this position.)
28 12
D / ES
1
2
3
4
5
BOTTOM VIEW
MHF
8
7
6
See Section B8, case E1, for dimensions.
F
IGURE
1: P
IN
O
UT
B2-79
CRANE [ Crane Aerospace & Electronics. ]
