Crane Aerospace & Electronics Power Solutions
SMFLHP Single and Dual DC/DC Converters
28 VOLT INPUT – 100 WATT
Electrical Characteristics: –55°C to +125°C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
DUAL OUTPUT MODELS
PARAMETER
OUTPUT VOLTAGE
TC = 25°C
OUTPUT CURRENT
2
V
IN
= 19
TO
40 VDC
OUTPUT POWER
2
V
IN
= 19
TO
40 VDC
OUTPUT RIPPLE
CONDITIONS
+ V
OUT
- V
OUT
EACH OUTPUT
TOTAL
EACH OUTPUT
TOTAL
10
K
H
Z
- 2 MH
Z
+ V
OUT
- V
OUT
+ V
OUT
- V
OUT
SEE NOTE 3
SEE NOTE 4
CONTINUOUS
TRANSIENT
1,
5
50 ms
NO LOAD
INHIBITED - INH1
INHIBITED - INH2
INPUT RIPPLE
CURRENT
EFFICIENCY
TC = 25°C
LOAD FAULT
TC = 25°C
10
K
H
Z
- 10 MH
Z
BALANCED LOAD
POWER DISSIPATION
SHORT CIRCUIT
RECOVERY
1,
6
STEP LOAD
RESPONSE
± V
OUT
STEP LINE
RESPONSE
1
± V
OUT
START-UP
50% - 100% - 50% TRANSIENT
RECOVERY
1,
6
19 - 40 -19 VDC TRANSIENT
1,
7
RECOVERY
1,
6
DELAY
OVERSHOOT
1
+ V
OUT
- V
OUT
SMFLHP2805D
MIN
4.95
4.92
0
0
0
0
—
—
—
—
—
—
—
—
19
0
—
—
—
—
75
—
—
—
—
—
—
—
—
TYP
5.00
5.00
—
—
—
—
25
25
0
25
0
25
6
7
28
—
50
9
35
30
80
15
1.5
350
1.5
250
200
3.5
0
MAX
5.05
5.08
11.2
SMFLHP2812D
MIN
TYP
MAX
11.88 12.00 12.12
11.80 12.00 12.18
0
—
—
—
—
50
50
0
25
10
50
2
2
28
—
50
9
35
30
86
15
1.5
450
1.5
250
200
3.5
0
SMFLHP2815D
MIN
TYP
MAX
14.85 15.00 15.15
14.77 15.00 15.23
—
—
—
—
50
50
0
25
10
50
2
2
28
—
50
9
35
30
87
15
1.5
450
1.5
250
200
3.5
0
4.67
6.67
70
100
225
225
50
100
100
200
4
4
40
50
120
14
80
80
—
20
4.0
700
3.0
800
600
20
50
UNITS
VDC
5.3 0
7.5 0
63
90
175
175
50
100
100
200
4
4
40
50
120
14
80
80
—
20
4.0
700
3.0
800
600
0
0
—
—
—
—
—
—
—
—
19
0
—
—
—
—
82
—
—
—
—
—
—
16.0 0
56
80
150
150
50
100
50
100
0
0
—
—
—
—
—
—
A
W
mV p-p
LINE REGULATION
V
IN
= 19
TO
40 VDC
LOAD REGULATION
NO LOAD TO FULL
CROSS REGULATION
TC = 25°C
INPUT VOLTAGE
NO LOAD TO FULL
INPUT CURRENT
TC = 25°C
mV
mV
8 —
8
40
50
120
14
80
80
—
20
4.0
450
3.0
600
300
20
25
—
19
0
—
—
—
—
81
—
—
—
—
—
—
—
—
%
VDC
V
mA
mA p-p
%
W
ms
mV pk
ms
mV pk
μ
s
ms
mV pk
20 —
50
—
Notes
1. Guaranteed by design, not tested.
2. Up to 70% of the total output power (current) is available from either output
provided the opposite output is carrying 30% of the power (current) in use.
3. Effect on negative Vout from 50%/50% loads to 30%/70% or 70%/30% loads.
4. Effect on negative Vout from 50%/50% loads to 10% then 50% load on
negative Vout
5. Unit will shut down above approximately 45V but will be undamaged and will
restart when voltage drops into normal range.
6. Recovery time is measured from application of the transient to point at which
Vout is within 1% of final value.
7. Transition time >10
μs.
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