FMTR SERIES
30 WATT
ABSOLUTE MAXIMUM RATINGS
Input Voltage
• 17 to 40 VDC
Output Power
• 25 to 30 watts depending on model
• Input filter current, 2.7 A max.
Lead Soldering Temperature (10 sec per pin)
• 300°C
Storage Temperature Range (Case)
• –65°C to +135°C
DC/DC C
ONVERTERS
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 inh/sync return
• If not used, connect to inh/sync return
Inhibit TTL Open Collector
• Logic low (output disabled)
Voltage
≤0.8
V
Inhibit pin current 8.0 mA max
• Referenced to inh/sync return
• Logic high (output enabled)
Open collector
TYPICAL CHARACTERISTICS
Output Voltage Temperature Coefficient
• 100 ppm/°C typical
Input to Output Capacitance
• 50 pF typ
Current Limit
• 115% of full load typical
Isolation
• 100 megohm minimum at 500 V
Audio Rejection
• 40 dB typical
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
Input Filter DC Resistance
• 0.2 ohms max
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range
• 17 to 40 VDC continuous
• 50V for 50 ms transient protection
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
EMI FILTER
Noise Rejection
500 kHz
1 MHz
5 MHz
- Minimum
55 dB
60 dB
60 dB
Electrical Characteristics: -55°C to +125° Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
SINGLE OUTPUT MODELS
PARAMETER
OUTPUT VOLTAGE
OUTPUT CURRENT
1
OUTPUT POWER
1
CONDITION
25°C
–55°C TO +125°C
V
IN
= 17 to 40 VDC
V
IN
= 17 to 40 VDC
FMTR283R3S
MIN
3.26
3.20
0
0
—
—
—
—
17
—
—
TYP
3.30
3.30
––
—
70
—
—
—
28
30
7
5
75
72
—
—
1.4
MAX
3.34
3.40
6.06
20
140
180
10
10
40
75
8
10
—
—
10
12
6
FMTR2805S
MIN
4.95
4.85
0
0
—
—
—
—
17
—
—
—
75
72
—
—
—
—
—
—
—
—
—
—
TYP
5.00
5.00
—
—
110
—
15
15
28
35
3
5
77
74
—
—
1.4
FMTR2812S
FMTR2815S
UNITS
VDC
A
W
mV p-p
mV
mV
VDC
mA
mA
mA p-p
%
MAX MIN TYP MAX MIN TYP MAX
5.05 11.88 12.00 12.12 14.85 15.00 15.15
5.15 11.64 12.00 12.36 14.55 15.00 15.45
5.0
0
—
2.5
0
—
2.0
25
220
260
50
50
40
75
8
10
—
—
10
12
5
0
—
—
—
—
17
—
—
—
79
76
—
—
—
—
—
—
—
—
—
—
—
60
—
15
15
28
35
3
5
82
78
—
—
1.4
30
120
160
50
50
40
75
8
10
—
—
10
12
5
0
—
—
—
—
17
—
—
—
80
77
—
—
—
—
—
—
—
—
—
—
—
25
—
15
15
28
35
3
5
83
79
—
—
1.4
30
50
90
50
50
40
75
8
10
—
OUTPUT RIPPLE
25°C
10 kHz – 2 MHz
VOLTAGE
LINE REGULATION
2
V
IN
= 17 to 40 VDC
LOAD REGULATION
INPUT VOLTAGE
1
INPUT CURRENT
1
INPUT RIPPLE
CURRENT
EFFICIENCY
LOAD FAULT
3
NO LOAD TO FULL
NO LOAD TO FULL
NO LOAD
INHIBITED
10 kHz – 10 MHz
—
25°C 73
INCLUDES FILTER
70
POWER DISSIPATION
SHORT CIRCUIT 25°C
–55°C TO +125°C
RECOVERY
4, 6
50% – 100% – 50%
TRANSIENT
RECOVERY
4, 6
17 – 40 – 17 VDC
TRANSIENT
5
RECOVERY
4
DELAY
OVERSHOOT
6
FULL LOAD
NO LOAD
—
—
—
—
—
—
—
—
—
—
10
12
5
W
ms
mV pk
µs
mV pk
µs
ms
STEP LOAD RESP.
±125 ±250
—
200
—
—
1.4
0
33
±300
300
5
50
150
±200 ±300
60
200
±200 ±300
—
300
1.4
0
50
5
50
250
±250 ±400
60
200
±400 ±500
—
300
1.4
0
120
5
120
600
±350 ±500
60
200
±500 ±600
—
300
1.4
0
150
5
150
750
STEP LINE RESP.
6
START-UP
1
mV pk
Notes
1. Tc = –55°C to +125°C
2. Operation is limited below 17V (see Figure 19).
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 1% of final value.
5. Transition time
≥10
µs.
6. Parameter shall be tested as part of device characterization and after design
and process changes. Thereafter, parameters shall be guaranteed to the
limits specified in the electrical Characteristics table.
2
CRANE [ Crane Aerospace & Electronics. ]
