Crane Aerospace & Electronics Power Solutions
SMRT Single, Dual and Triple DC/DC Converters
28 VOLT INPUT – 35 WATT
Electrical Characteristics: -55°C to +125°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
DUAL OUTPUT MODELS
PARAMETER
OUTPUT VOLTAGE
OUTPUT CURRENT
2, 5
OUTPUT POWER
2, 5
V
IN
= 19
TO
56 VDC
V
OUT
A
V
OUT
B
TOTAL
OUTPUT RIPPLE
LINE REGULATION
LOAD REGULATION
TOTAL REGULATION
10
K
H
Z
- 20 MH
Z
V
IN
= 19 TO 50 VDC
V
IN
= 19, 28, 50 VDC
ALL CONDITIONS OF
LINE, LOAD, AGING,
TEMP AND RADIATION
CONTINUOUS
TRANSIENT 100 ms
INPUT CURRENT
INHIBITED
7
NO LOAD
INPUT RIPPLE
CURRENT
9
EFFICIENCY
LOAD FAULT
STEP LOAD
RESPONSE
6
STEP LINE
RESPONSE
1
POWER DISSIPATION
3
TRANSIENT
RECOVERY
19 - 56 - 19 V
IN
TRANSIENT
RECOVERY
START-UP
DELAY
4
NO LOAD AND FULL
OVERSHOOT
4
CAPACITIVE LOAD
1
UNCONDITIONALLY
STABLE, START-UP
DELAY INCREASED
TC = 25°C
10 kHz - 20 MHz
CONDITIONS
V
OUT
A
V
OUT
B
MIN
4.90
4.90
—
0
0
0
—
—
—
4.6
19
0
—
—
—
66
—
-450
—
-500
—
—
—
—
SMRT2805D
TYP
5.00
5.00
—
—
—
—
—
—
5
—
28
—
—
—
10
—
—
—
—
—
—
—
—
—
MAX
5.10
5.10
3.0
15
15
30
200
30
40
MIN
SMRT2812D
TYP
12.00
12.00
—
—
—
—
—
5
5
—
28
—
—
—
10
—
—
—
—
—
—
—
—
—
MAX
12.24
12.24
1.46
17.5
17.5
35
MIN
11.76
11.76
0
0
0
0
—
—
—
SMRT2815D
TYP
15.00
15.00
—
—
—
—
—
5
5
—
28
—
—
—
10
—
—
—
—
—
—
—
—
—
MAX
15.30
15.30
1.17
17.5
17.5
35
180
30
40
16.0
56
80
50
110
50
—
20
575
3
700
4
25
150
5000
mA
mA p-p
%
W
mV pk
ms
mv pk
ms
ms
mV pk
μF
mV p-p
mV
mV
V
out
VDC
V
W
VDC
A
UNITS
14.70
14.70
—
0
0
0
200 —
25 —
50
13.1
56
80
—
14.0
19
0
5.4 10.9
56
80
50
110
19
0
—
—
INPUT VOLTAGE
7, 8
50 —
100 —
150 —
—
20
450
75
—
-575
50 —
—
75
28 —
450
-450
3 —
500
-1000
2 —
1000
-700
4 —
25
—
3 —
20
350
5000
—
—
—
50 —
5000
—
Notes
1. Guaranteed by design, not tested.
2. The specified maximum current/power is available from each output.
3. Maximum power dissipation when both outputs are shorted simultaneously.
4. Measured from release of inhibit or input voltage step.
5. A minimum output load on all outputs of 2% of full load should be used on all outputs at TID of 100k rad(Si) or greater to ensure tight regulation over the full
input voltage range.
6. Half load to/from full load; Transition time
≥
10
μs.
7. Converter should not be inhibited or operated below 19 Vin above 5x10
4
rads (Si) total dose.
8. If 3.3S model is trimmed to the high end of its range, then minimum Vin = 22 V.
9. Converters meet MIL-STD-461 specification revisions for conducted emissions C-CE03 and D-/E-CE-102. The actual value of input ripple current is much less, the limit in
the characteristic table is based on measurement resolution.
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Rev B – 20080213
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