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.
SINGLE OUTPUT MODELS
SMFLHP283R3S SMFLHP2805S SMFLHP2812S SMFLHP2815S
MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX
3.26 3.30 3.34 4.95 5.00 5.05 11.88 12.00 12.12 14.85 15.00 15.15
UNITS
PARAMETER
CONDITIONS
TC = 25°C
OUTPUT VOLTAGE
OUTPUT CURRENT
OUTPUT POWER
VDC
A
VIN = 19 TO 40 VDC
VIN = 19 TO 40 VDC
TC = 25°C
0
—
—
10
20
0
16
53
25
40
50
20
0
—
—
15
30
0
16
80
50
90
50
20
0
—
—
7.5
90
0
—
—
6.67
100
95
0
0
0
0
W
OUTPUT RIPPLE
10 KHZ - 2 MHZ
—
—
—
—
19
—
—
—
—
—
—
—
—
—
—
—
—
—
30
85
—
—
—
—
30
45
mV p-p
TC = -55°C TO +125°C
VIN = 19 TO 40 VDC
NO LOAD TO FULL
45
0
150
50
175
50
LINE REGULATION
LOAD REGULATION
0
mV
mV
VDC
V
0
0
0
20
0
20
INPUT VOLTAGE
CONTINUOUS
28
—
70
9
40 19
28
—
70
9
40 19
28
40 19
28
—
40
NO LOAD TO FULL
1, 2
TRANSIENT
50 ms
50
120
15
—
—
—
—
—
50
120
15
—
—
—
—
—
—
80
9
50
120
15
—
—
—
—
—
50
INPUT CURRENT
NO LOAD
80
120
15
mA
INHIBITED - INH1
INHIBITED - INH2
10 KHZ - 10 MHZ
9
35
30
80
35
30
80
35
30
80
35
30
80
INPUT RIPPLE
CURRENT
80
80
80
80
mA p-p
EFFICIENCY
TC = 25°C
70
72
—
77
80
—
81
86
—
82
87
—
%
W
LOAD FAULT
TC = 25°C
SHORT CIRCUIT
POWER DISSIPATION
—
—
—
15
1.5
22
10
—
—
—
15
1.5
20
4
—
—
—
15
1.5
20
4
—
—
—
15
20
4
1
1.5
ms
RECOVERY
STEP LOAD
RESPONSE
50% - 100% - 50%
TRANSIENT
350
400
350
450
450
700
450
700
mV pk
1, 3
RECOVERY
—
—
1.5
3.0
—
—
1.5
3.0
—
—
1.5
3.0
—
—
1.5
3.0
ms
STEP LINE
RESPONSE
19 - 40 -19 VDC
250
400
250
400
250
800
250
800
mV pk
1
4
TRANSIENT
3
RECOVERY
—
—
200
3.5
300
10
—
—
200
3.5
600
10
—
—
200
3.5
600
10
—
—
200
3.5
600
10
μs
START-UP
DELAY
ms
1
OVERSHOOT
—
0
50
—
0
25
—
0
50
—
0
50
mV pk
Notes
1. Guaranteed by design, not tested.
2. Unit will shut down above approximately 45V but will be undamaged and will restart
when voltage drops into normal range.
3. Recovery time is measured from application of the transient to point at which Vout
is within 1% of final value.
4. Transition time >10 μs.
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