SMHF SERIES
SINGLE AND DUAL
15 WATT
DC/DC CONVERTERS
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, radiation level O, unless otherwise specified.
DUAL OUTPUT MODELS
SMHF2805D
SMHF2812D
SMHF2815D
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
OUTPUT VOLTAGE
+V
4.95
5.00
5.05
11.88
12.00
12.12
14.85
15.00
15.15
OUT
VDC
–V
OUT
4.92
5.00
5.08
11.82
12.00
1218
14.78
15.00
15.23
1
OUTPUT CURRENT
V
V
= 16 to 40 VDC
= 16 to 40 VDC
—
—
1.2
—
1.68
12
—
—
0.625
—
0.875
15
—
—
0.500
—
0.700
15
A
IN
IN
1
OUTPUT POWER
W
OUTPUT RIPPLE
10 kHz - 2 MHz
—
—
60
160
240
—
—
70
175
275
—
—
70
175
275
mV p-p
mV
VOLTAGE
V
Tc = –55°C to +125°C
100
100
100
OUT
LINE REGULATION
BALANCED +V
OUT
—
5
50
—
5
50
—
5
50
Vin = 16 to 40 VDC
LOAD REGULATION
LOAD
BALANCED +V
LOAD –V
NEGATIVE V
–V
—
—
—
100
50
—
—
—
100
50
—
—
—
100
50
OUT
20
20
20
OUT
mV
%
—
—
—
6
150
7.5
—
—
—
3
150
6
—
—
—
3
150
6
OUT
2
CROSS REGULATION
OUT
INPUT VOLTAGE
NO LOAD TO FULL
INPUT CURRENT
CONTINUOUS
TRANSIENT 50 msec
NO LOAD
16
—
—
—
—
—
—
75
28
—
40
50
16
—
—
—
—
—
—
74
28
—
40
50
16
—
—
—
—
—
—
74
28
—
40
50
VDC
V
20
540
6
50
25
645
5
50
25
638
5
50
FULL LOAD
600
12
754
12
754
12
mA
INHIBITED
INPUT RIPPLE
CURRENT
10 kHz - 10 MHz
Tc = –55°C to +125°C
30
60
77
80
40
55
81
80
40
55
82
80
mA p-p
%
120
—
120
—
120
—
EFFICIENCY
3
LOAD FAULT
SHORT CIRCUIT
POWER DISSIPATION
—
—
3
8
—
—
3
6
—
—
3
6
W
4
RECOVERY
7.5
30
7.5
50
7.5
50
ms
5
STEP LOAD RESP.
50% – 100% – 50%
BALANCED LOADS
+V
OUT
–600
200
600
–600
300
600
–600
300
600
TRANSIENT
mV pk
µs
–V
–600
—
150
150
600
500
–600
—
100
200
500
500
–600
—
100
200
600
600
OUT
4
RECOVERY
STEP LINE RESP.
16 – 40 – 40 VDC
6
V
TRANSIENT
–800
600
800
–750
550
750
–750
550
750
mV pk
OUT
4
RECOVERY
—
—
0
0.8
12
1.2
30
—
—
0
0.8
12
1.2
25
—
—
0
0.8
12
1.2
25
ms
ms
START-UP
DELAY
7
OVERSHOOT
100
500
200
500
200
500
mV pk
Notes
1. Up to 70% of the total output power is available from either output providing
the opposite output is simultaneously carrying 30% of the total output
power. Each output must carry a minimum of 30% of the total output
power in order to maintain regulation on the negative outputs.
2. Effect on –Vout for the following conditions, percentages are of total power:
+Po = 50% to 10% and –Po = 50%
3. Indefinite short circuit protection not guaranteed above 125°C (case)
4. Recovery time is measured from application of the transient to point at
which Vout is within regulation.
5. Response of either output with the opposite output held at half of the total
output power.
6. Input step transition time >10µs.
+Po = 50% and –Po = 50% to 10%
7. Input step transition time <100µs.
35
CRANE [ Crane Aerospace & Electronics. ]
