notes
1. guaranteed by design, not tested.
2. For MHF+281r9, load regulation is tested from a 10 ma load to full load.
3. indefinite short circuit protection not guaranteed above 125°C (case).
4. recovery time is measured from application of the transient.
to the point at which vout is within regulation.
5. Step transition time >10 s.
6. Step line is 20 - 32 - 20 vdC for MHF+281r39S.
electrical Characteristics: -55° to +125°C tC , 28 vdC vin, 100% load, free run, unless otherwise specified.
Single outPut ModelS
MHF+281r9S
MHF+283r3S
MHF+2805S
unitS
paraMeter
COnDitiOnS
Min
tyP
MaX
Min
tyP
MaX
Min
tyP
MaX
Output VOltage
1.84
1.90
1.96
3.20
3.30
3.40
4.85
5.00
5.15
vdC
Output Current
Vin = 16 tO 40 VDC
0
–
3.5
0
—
2.4
0
—
2.4
a
Output pOwer
Vin = 16 tO 40 VDC
0
—
6.65
0
—
8
0
—
12
W
Output ripple
tC = 25°C
—
7
30
—
30
80
—
30
80
mv p-p
10 kHz - 2 MHz
—
12
40
—
50
240
—
60
100
line regulatiOn
Vin = 16 tO 40 VDC
—
1
40
–
5
100
—
5
50
mv
lOaD regulatiOn
nO lOaD tO Full 2
—
35
55
–
20
50
—
20
50
mv
input VOltage
nO lOaD tO Full
COntinuOuS
20
28
32
16
28
40
16
28
40
vdC
tranSient 50 ms 1
—
35
—
50
—
50
v
input Current
nO lOaD
—
16
35
—
25
40
—
25
40
ma
inHiBiteD
—
2
7
—
5
12
—
5
12
input ripple Current
tC = 25°C
—
30
60
–
45
80
—
35
80
ma p-p
10 kHz - 10 MHz
—
70
—
120
—
100
eFFiCienCy
56
62
—
67
75
–
72
77
—
%
lOaD Fault 3, 4
pOwer DiSSipatiOn
SHOrt CirCuit
—
4
8
—
5
8
—
3.5
6
W
reCOVery 1
—
5
30
—
7.5
30
—
7.5
30
ms
Step lOaD
reSpOnSe 4, 5
50% - 100% - 50%
tranSient
—
±75
±500
—
±150
±400
—
±150
±400
mv pk
reCOVery
—
500
2000
—
150
300
—
150
300
s
Step line
reSpOnSe 1, 4, 5
16 - 40 - 16 VDC 6
tranSient
—
±300
±600
—
±550
±800
—
±550
±800
mv pk
reCOVery
—
0.5
1.2
—
0.8
1.2
—
0.8
1.2
ms
Start-up 5
Delay
—
12
35
–
10
25
—
10
25
ms
OVerSHOOt 1
—
500
850
—
200
300
—
100
600
mv pk
CaPaCitive load 1
—
100
–
300
–
300
F
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Page 8 of 23
Crane aerospace & electronics Power solutions
MHF+ Single, dual and triple dC/dC Converters
28 VOlT inPuT – 15 WATT
MHF+ rev l - 20091113