SMFL SERIES
65 WATT
ABSOLUTE MAXIMUM RATINGS
Input Voltage
• 16 to 40 VDC
Power Dissipation (Pd)
• 14 watts (16 watts SMFL2805S, SMFL2805D)
Output Power
• 40 to 65 watts depending on model
Lead Soldering Temperature (10 sec per lead)
• 300°C
Storage Temperature Range (Case)
• –65°C to +150°C
DC/DC C
ONVERTERS
SYNC AND INHIBIT (INH1, INH2)
Sync In (525 to 675 kHz)
• Duty cycle 40% min, 60% max
• Logic low 0.8 V max
• Logic high 4.5 V min, 9 V max
• Referenced to input common
• If not used, connect to input common
Sync Out
• Referenced to input common
• If not used, leave unconnected
Inhibit (INH1, INH2) TTL Open Collector
• Logic low (output disabled)
INH1 referenced to input common
Logic low 0.8 V max
Inhibit pin current 10 mA max
INH2 referenced to output common
Logic low 0.5 V max
Inhibit pin current 5 mA max
• Logic high (output enabled)
Open collector
• If not used, leave unconnected
TYPICAL CHARACTERISTICS
Output Voltage Temperature Coefficient
• 100 ppm/°C typical
Input to Output Capacitance
• 150 pF, typical
Isolation
• 100 megohm minimum at 500 V
Audio Rejection
• 50 dB typical
Conversion Frequency
• Free run mode 600 kHz typical
550 kHz. min, 650 kHz max
• External sync range 525 to 675 kHz
Inhibit Pin Voltage (unit enabled)
• INH1 = 9 to12 V, INH2 = 6 to 9 V
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range
• 16 to 40 VDC continuous
Case Operating Temperature (Tc)
• –55°C to +125°C full power
PINS NOT USED
TR1, Master, and Slave
If not used, leave unconnected
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, radiation level O, unless otherwise specified.
SINGLE OUTPUT MODELS
PARAMETER
OUTPUT VOLTAGE
OUTPUT CURRENT
OUTPUT POWER
OUTPUT RIPPLE
VOLTAGE 10 k - 2 MHz
LINE REGULATION
LOAD REGULATION
INPUT VOLTAGE
INPUT CURRENT
CONDITION
Tc = 25°C
V
IN
= 16 TO 40 VDC
V
IN
= 16 TO 40 VDC
Tc = 25°C
Tc = –55°C to +125°C
V
IN
= 16 to 40 VDC
NO LOAD TO FULL
CONTINUOUS
TRANSIENT
1, 4
50 ms
NO LOAD
FULL LOAD
INHIBITED - INH1
INHIBITED - INH2
INPUT RIPPLE
CURRENT
EFFICIENCY
LOAD FAULT
2
10 kHz - 10 MHz
Tc = 25°C
POWER DISSIPATION
SHORT CIRCUIT
Tc = 25°C
RECOVERY
STEP LOAD RESP.
50% – 100% – 50%
TRANSIENT
RECOVERY
3, 4
16 – 40 – 16 VDC
TRANSIENT
RECOVERY
DELAY
OVERSHOOT
4
SMFL283R3S
MIN
3.27
0
0
—
—
—
—
16
—
—
—
—
—
—
70
TYP MAX
3.3 3.33
—
—
10
10
0
—
28
—
70
—
9
35
15
—
12
40
35
50
20
20
40
50
100
2.1
14
70
50
—
SMFL2805S
MIN
4.95
0
0
—
—
—
—
16
—
—
—
—
—
—
75
TYP MAX
5.00 5.05
—
—
15
30
0
—
28
—
70
—
9
35
15
80
10
50
35
50
20
20
40
50
120
2.5
14
70
50
—
SMFL2812S
MIN TYP MAX
11.88 12.00 12.12
0
0
—
—
—
—
16
—
—
—
—
—
—
81
—
—
30
45
0
—
28
—
50
—
9
35
15
86
5
60
75
100
20
20
40
50
80
2.8
14
70
50
—
SMFL2815S
MIN TYP MAX
14.85 15.00 15.15
0
0
—
—
—
—
16
—
—
—
—
—
—
82
—
—
30
45
0
—
28
—
50
—
9
35
15
87
4.33
65
85
110
20
20
40
50
80
3.0
14
70
50
—
mA pp
%
UNITS
VDC
A
W
mV p-p
mV
mV
VDC
V
mA
A
mA
—
—
—
—
—
—
—
—
12.5
1.5
200
1.5
250
200
3.5
0
14
4
300
3.0
300
30
6
25
—
—
—
—
—
—
—
—
12.5
1.5
250
1.5
250
200
3.5
0
16
4
350
3.0
300
300
6
25
—
—
—
—
—
—
—
—
10
1.5
450
1.5
250
200
3.5
0
14
4
700
3.0
400
300
6
50
—
—
—
—
—
—
—
—
10
1.5
500
1.5
250
200
3.5
0
14
4
700
3.0
400
300
6
50
W
ms
mV p
ms
mV pk
µs
ms
mV pk
STEP LINE RESP
3, 4
.
START-UP
Notes
1. Unit will shut down above approximately 45V but will be undamaged and
will restart when voltage drops into normal range.
2. Indefinite short circuit protection not guaranteed above 125°C case.
3. Recovery time is measured from application of the transient to point at
which Vout is within 1% of final value.
4. Guaranteed but not tested.
2
INTERPOINT [ INTERPOINT CORPORATION COMPANY ]
