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35
DC/DC C
ONVERTERS
SMHFSERIES
SINGLE AND DUAL
15 WATT
DUAL OUTPUT MODELS
SMHF2805D
SMHF2812D
SMHF2815D
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
OUTPUT VOLTAGE
+V
OUT
–V
OUT
4.95
5.00
5.05
11.88
12.00
12.12
14.85
15.00
15.15
VDC
4.92
5.00
5.08
11.82
12.00
1218
14.78
15.00
15.23
OUTPUT CURRENT
1
OUTPUT POWER
1
V
IN
= 16 to 40 VDC
V
IN
= 16 to 40 VDC
10 kHz - 2 MHz
Tc = –55°C to +125°C
—
±1.2
1.68
—
±0.625
0.875
—
±0.500
0.700
A
—
—
12
—
—
15
—
—
15
W
OUTPUT RIPPLE
VOLTAGE ±V
OUT
LINE REGULATION
—
—
60
100
160
240
—
—
70
100
175
275
—
—
70
100
175
275
mV p-p
BALANCED +V
OUT
LOAD
—
5
50
—
5
50
—
5
50
mV
Vin = 16 to 40 VDC
–V
OUT
—
—
100
—
—
100
—
—
100
LOAD REGULATION
BALANCED +V
OUT
LOAD
—
20
50
—
20
50
—
20
50
mV
–V
OUT
—
—
150
—
—
150
—
—
150
CROSS REGULATION
2
NEGATIVE V
OUT
CONTINUOUS
TRANSIENT 50 msec
NO LOAD
FULL LOAD
INHIBITED
10 kHz - 10 MHz
Tc = –55°C to +125°C
—
6
7.5
—
3
6
—
3
6
%
INPUT VOLTAGE
NO LOAD TO FULL
INPUT CURRENT
16
—
—
—
—
—
—
75
28
—
20
540
6
30
60
77
40
50
50
600
12
80
120
—
16
—
—
—
—
—
—
74
28
—
25
645
5
40
55
81
40
50
50
754
12
80
120
—
16
—
—
—
—
—
—
74
28
—
25
638
5
40
55
82
40
50
50
754
12
80
120
—
VDC
V
mA
INPUT RIPPLE
CURRENT
EFFICIENCY
mA p-p
%
LOAD FAULT
SHORT CIRCUIT
3
POWER DISSIPATION
RECOVERY
4
50% – 100% – 50%
TRANSIENT+V
OUT
—
—
3
8
30
—
—
3
6
50
—
—
3
6
W
ms
7.5
7.5
7.5
50
STEP LOAD RESP.
5
BALANCED LOADS
–600
200
600
–600
300
600
–600
300
600
mV pk
–V
OUT
–600
150
600
–600
100
500
–600
100
600
RECOVERY
4
16 – 40 – 40 VDC
TRANSIENT
6
RECOVERY
4
DELAY
OVERSHOOT
7
—
150
500
—
200
500
—
200
600
μs
STEP LINE RESP.
± V
OUT
–800
600
800
–750
550
750
–750
550
750
mV pk
—
—
0
0.8
12
100
1.2
30
500
—
—
0
0.8
12
200
1.2
25
500
—
—
0
0.8
12
200
1.2
25
500
ms
ms
START-UP
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%
+Po = 50% and –Po = 50% to 10%
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.
7. Input step transition time <100μs.
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, radiation level O, unless otherwise specified.