Crane Aerospace & Electronics Power Solutions
sMrt28 singlꢂ, Dꢀꢄl ꢄnd tꢃiplꢂ spꢄꢇꢂ Dc/Dc convꢂꢃꢁꢂꢃꢈ
28 VOLt Iꢆꢅut – 35 Watt – sꢅace quaLIFIeD
Electrical Characteristics: -55°C to +125°C T , 28 VDC Vin, 100% load, unless otherwise specified.
C
SIꢀꢁLE OUTPUT MODELS
SMRT283R3S
SMRT2805S
SMRT288R7S
unItS
parameter
COnDItIOnS
MIꢀ
TYP
3.30
—
MAX
MIꢀ
TYP
5.00
—
MAX
MIꢀ
TYP
8.70
—
MAX
Output VOltage
Output Current
3.23
0
3.37
6.97
23
4.90
0
5.10
6.0
30
8.52
0
8.87
4.0
35
VDC
A
2
2
Output pOwer
V
= 19 tO 56 VDC
0
—
0
—
0
—
W
In
Output rIpple
10 khz - 20 mhz
= 19, 50 VDC
—
—
—
—
—
280
30
—
—
—
—
—
200
30
—
—
—
—
—
200
30
mV p-p
mV
2
lIne regulatIOn
V
5
5
5
In
lOaD regulatIOn
5
40
5
40
5
80
mV
V
= 19, 50
—
90
—
70
—
80
In
1
tOtal regulatIOn
all COnDItIOnS OF
lIne, lOaD, agIng,
temp anD raDIatIOn
V
3.0
—
3.6
4.7
—
5.3
8.3
—
9.1
VDC
Out
Input VOltage
Input Current
COntInuOuS
19
0
28
—
—
—
10
—
—
—
—
—
56
80
19
0
28
—
—
—
10
—
—
—
—
—
56
80
19
0
28
—
—
—
10
—
—
—
—
—
56
80
VDC
V
1
tranSIent 100 ms
InhIbIteD
nO lOaD
—
—
—
60
—
—
—
—
50
—
—
—
66
—
—
—
—
50
—
—
—
72
—
—
—
—
50
mA
110
50
110
50
115
50
3
Input rIpple Current
eFFICIenCy
10 kHz - 20 MHz
mA p-p
%
—
—
—
4, 5
lOaD Fault
POWERꢀDISSIPATION
31
28
25
W
1
reCOVery
25
25
25
ms
5, 6, 7
Step lOaD reSpOnSe
tranSIent
reCOVery
±450
3
±450
3
±450
4
mV pk
ms
1, 5, 6
Step lIne reSpOnSe
19 - 50 - 19 V
In
—
—
—
—
—
—
—
—
±500
4
—
—
—
—
—
—
—
—
±500
4
—
—
—
—
—
—
—
—
±500
4
mV pk
ms
tranSIent
reCOVery
8
Start-up
Delay
nO lOaD anD Full
35
25
60
ms
OVerShOOt
50
50
95
mV pk
1
CapaCItIVe lOaD
unCOnDItIOnally
Stable, Start-up
Delay InCreaSeD
t
= 25°C
—
—
5000
—
—
5000
—
—
5000
µF
C
ꢀotes
1. ꢊꢀꢄꢃꢄnꢁꢂꢂd by dꢂꢈign, noꢁ ꢁꢂꢈꢁꢂd.
2. To maintain tight regulation over the full input voltage range a minimum load of 2% of full load should be used on all outputs.
3. Converters meet MIL-STD-461 specification revisions for conducted emissions C-CE03 and D-/E-/F-CE-102. The actual value of input ripple current is much less, the
limit in the characteristic table is based on measurement resolution..
4. Maximum power dissipation when output is shorted.
5. Recovery time is measured from application of the transient to point at which VOUT is within 1% of VOUT at final value.
6. Transition time >10 µs.
7. Half load to/from full load.
8. Measured from release of inhibit or input voltage step
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SMRT28 Rev E - 20100216
CRANE [ Crane Aerospace & Electronics. ]
