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参数资料
| 型号： | SMTR |
| 厂商： | Standard Power |
| 英文描述： | DC/DC CONVERTERS 28 VOLT INPUT |
| 中文描述： | DC / DC转换28伏的输入 |
| 文件页数： | 2/12页 |
| 文件大小： | 259K |
| 代理商： | SMTR |
TYPICAL CHARACTERISTICS
Output Voltage Temperature Coefficient
100 ppm/°C typical single and dual outputs
200 ppm/°C main, 300 ppm/°C aux
triple output
Input to Output Capacitance
50 pF typ (100 pF typ triple outputs)
Current Limit
115% of full load typical
Isolation
100 megohm minimum at 500 V
Audio Rejection
40 dB typ (50 dB typ triple output)l
Conversion Frequency
Free run 550 min, 600 typ, 650 max kHz
External sync 500 to 675 kHz
Inhibit Pin Voltage (unit enabled)
9 to 11 V
SYNC AND INHIBIT
Sync (500 to 675 kHz)
Duty cycle 40% min, 60% max
Logic low 0.8 V max
Logic high 4.5 V min, 5 V max
Referenced to input common
If not used, connect to input common
Inhibit TTL Open Collector
Logic low (output disabled)
Voltage
≤
0.8 V
Inhibit pin current 8.0 mA max
Referenced to input common
Logic high (output enabled)
Open collector
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range
16 to 40 VDC continuous
50 V for 50 msec transient
Case Operating Temperature (Tc)
–55°C to +125°C full power
–55°C to +135°C absolute
Derating Output Power/Current
Linearly from 100% at 125°C to 0% at 135°C
ABSOLUTE MAXIMUM RATINGS
Input Voltage
16 to 40 VDC
Output Power
25 to 30 watts depending on model
Lead Soldering Temperature (10 sec per pin)
300°C
Storage Temperature Range (Case)
–65°C to +135°C
2
SMTR SERIES
30 WATT
DC/DC C
ONVERTERS
Notes
1. Tc = –55°C to +125°C
2. Operation is limited below 16V (see Figure 21).
3. Tested with 3300 pF ceramic bypass capacitors connected externally from
input common to case and output common to case.
4. Indefinite short circuit protection not guaranteed above 125°C case.
5. Recovery time is measured from application of the transient to point at which
Vout is within 1% of final value.
6. Transition time
≥
10 μs.
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, radiation level O, unless otherwise specified.
SINGLE OUTPUT MODELS
SMTR283R3S
SMTR2805S
SMTR2812S
SMTR2815S
PARAMETER
OUTPUT VOLTAGE
OUTPUT CURRENT
1
OUTPUT POWER
1
CONDITION
MIN
3.27
0
0
TYP
3.30
––
—
MAX
3.33
5.45
18
MIN
4.95
0
0
TYP
5.00
—
—
MAX
5.05
5.0
25
MIN
11.88 12.00 12.12 14.85 15.00 15.15
0
—
2.5
0
—
30
TYP
MAX
MIN
TYP
MAX
UNITS
VDC
A
W
V
IN
= 16 to 40 VDC
V
IN
= 16 to 40 VDC
10 kHz – 2 MHz
Tc = –55°C TO +125°C
Vin = 16 to 40 VDC
Tc = –55°C TO +125°C
NO LOAD TO FULL
Tc = –55°C TO +125°C
CONTINUOUS
TRANSIENT 50 ms
0
0
—
—
2.0
30
OUTPUT RIPPLE
VOLTAGE
LINE REGULATION
2
—
—
15
—
40
50
—
—
35
50
40
90
—
—
25
40
40
90
—
—
25
40
40
90
mV p-p
—
—
20
—
15
50
—
15
50
—
15
50
mV
LOAD REGULATION
—
16
—
—
28
—
20
40
50
—
16
—
15
28
—
50
40
50
—
16
—
15
28
—
50
40
50
—
16
—
15
28
—
50
40
50
mV
VDC
V
INPUT VOLTAGE
1
NO LOAD TO FULL
INPUT CURRENT
1
NO LOAD
FULL LOAD
INHIBITED
10 kHz – 10 MHz
Tc = –55°C TO +125°C
—
—
—
30
0.94
7
75
—
8
—
—
—
35
1.15
3
75
—
8
—
—
—
35
1.30
3
75
—
8
—
—
—
35
1.25
3
75
—
8
mA
A
mA
INPUT RIPPLE
CURRENT
3
EFFICIENCY
LOAD FAULT
4
—
74
25
76
50
—
—
74
20
78
50
—
—
78
20
83
50
—
—
79
20
84
50
—
mA p-p
%
SHORT CIRCUIT
POWER DISSIPATION
RECOVERY
1, 5
50% – 100% – 50%
TRANSIENT
RECOVERY
5
16 – 40 – 16 VDC
TRANSIENT
6
RECOVERY
5
DELAY
OVERSHOOT
FULL LOAD
NO LOAD
—
—
—
1.4
10
6
—
—
—
1.4
10
5
—
—
—
1.4
10
5
—
—
—
1.4
10
5
W
ms
STEP LOAD RESP.
—
—
±125
—
±250
200
—
—
±200 ±300
60
—
—
±250 ±400
60
—
—
±350 ±500
60
mV pk
μs
200
200
200
STEP LINE RESP.
—
—
—
—
—
1.4
±300
300
5
—
—
—
±200 ±300
—
1.4
—
—
—
±400 ±500
—
1.4
—
—
—
±500 ±600
—
1.4
mV pk
μs
ms
300
5
300
5
300
5
START-UP
1
—
—
0
50
150
—
—
0
50
50
250
—
—
0
120
600
—
—
0
150
750
mV pk
33
120
150
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