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ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
FUNCTIONAL SPECIFICATIONS, ULS-3.3/8-D48
ABSOLUTE MAXIMUM RATINGS
Conditions ?
Minimum
Typical/Nominal
Maximum
Units
Input Voltage, Continuous
Input Voltage, Transient
Isolation Voltage
Input Reverse Polarity
100 mS max. duration
Input to output, continuous
None, install external fuse
0
None
80
100
2250
Vdc
Vdc
Vdc
Vdc
On/Off Remote Control
Output Power
Power on, referred to -Vin
0
0
15
26.66
Vdc
W
Output Current
Current-limited, no damage, short-circuit
protected
0 8 A
Storage Temperature Range
Vin = Zero (no power) -55 125 °C
Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those
listed in the Performance/Functional Speci?cation s Table is not implied or recommended.
INPUT
Conditions ? ?
Operating voltage range
Recommended External Fuse
Fast blow
36
48
75
1.5
Vdc
A
Start-up threshold
Undervoltage shutdown
Rising input voltage
Falling input voltage
34
32
35.2
34
36
35.2
Vdc
Vdc
Turn-On/Turn-Off Hysteresis
Overvoltage shutdown
1.5
None
Vdc
Vdc
Reverse Polarity Protection
Internal Filter Type
None, install external fuse
None
LC
Vdc
Input current
Full Load Conditions
Low Line
Inrush Transient
Output in Short Circuit
No Load
Shut-Down Input Current (Off, UV, OT)
Re?ected (back) ripple current ?
Vin = nominal
Vin = minimum
Iout = minimum, unit = ON
Measured at input with speci?ed ?lter
0.58
0.77
0.05
50
75
1
30
0.63
0.83
100
100
2
A
A
A 2 -Sec.
mA
mA
mA
mA, p-p
GENERAL and SAFETY
Ef?ciency
Vin = 48V, full load
Vin = min., full load
89
89.5
90
90.5
%
%
Isolation
Isolation Voltage
Insulation Safety Rating
Input to output, continuous
2250
basic
Vdc
Isolation Resistance
Isolation Capacitance
10
1000
MΩ
pF
Safety
Certi?ed to UL-60950-1, CSA-C22.2 No. 60950-1,
IEC/EN60950-1, 2nd edition
Yes
Calculated MTBF
Per Telcordia SR332, issue 1, class 3, ground
?xed, Tambient = +25°C
2
Hours x 10 6
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency
Startup Time
Startup Time
Dynamic Load Response
Dynamic Load Peak Deviation
Power on to Vout regulated
Remote ON to Vout regulated
50-75-50% load step, settling time to within
2% of Vout
same as above
320
350
100
±30
380
50
50
150
±100
KHz
mS
mS
μSec
mV
FEATURES and OPTIONS
Remote On/Off Control ?
“N” suf?x:
Negative Logic, ON state
Negative Logic, OFF state
Control Current
ON = Ground pin or external voltage
OFF = Pin open or external voltage
Open collector/drain
-0.7
10
1
1.2
15
V
V
mA
“P” suf?x:
Positive Logic, ON state
Positive Logic, OFF state
Control Current
ON = Pin open or external voltage
OFF = Ground pin or external voltage
Open collector/drain
10
-0.7
1
15
1.2
V
V
mA
SMT Mounting
"M" suf?x
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MDC_ULS-30W_C06 Page 3 of 30
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