36 to 75 Volts DC inputs and delivers fixed outputs
regulated to within ±0.2%. The ULS converters
are ideal for datacom and telecom applications,
cell phone towers, data centers, server farms and
network repeaters.
ULS outputs may be trimmed within ±10% of
nominal output while delivering fast settling to
current step loads and no adverse effects from
higher capacitive loads. Excellent ripple and noise
specifications assure compatibility to circuits using
CPU’s, ASIC’s, programmable logic and FPGA’s. No
minimum load is required. For systems requiring
controlled startup/shutdown, an external remote
On/Off control may use a switch, transistor or
digital logic. Remote Sense inputs compensate for
resistive line drops at high currents.
Many self-protection features on the ULS series
avoid both converter and external circuit hazards.
These include input undervoltage lockout and
overtemperature shutdown. The outputs current
limit using the “hiccup” autorestart technique and
the outputs may be short-circuited indefinitely.
Additional features include output overvoltage and
reverse conduction elimination.
The half bridge synchronous rectifier topology
yields high efficiency for minimal heat buildup and
“no fan” operation.
F1
+Vin (1)
Barrier
+Vout (8)
External
DC
Power
Source
On/Off
Control
(2)
Controller
and Power
Open = On
Reference and
Error Amplifier
Trim (6)
-Vin (3)
-Vout (4)
Typical topology is shown
Figure 1. Simplified Block Diagram
For full details go to
www.murata-ps.com/rohs
REG.-Nr. D216
www.murata-ps.com/support
MDC_ULS-100 Series.A01.D20
Page 1 of 28
ULS 100-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC-DC Converters
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE
Output
Root Model
ULS-3.3/30-D48
ULS-5/20-D48
ULS-12/8.3-D48
V
OUT
(V)
3.3
5
12
Input
I
IN
, full
load (A)
2.27
2.29
2.26
I
OUT
Power R/N (mV pk-pk)
Regulation (max.)
V
IN
Nom. Range I
IN
, no load
(A, max.) (W)
(V)
(V)
(mA)
Typ.
Max.
Line
Load
30
20
8.3
99
100
99.6
70
60
80
100
120
150
±0.1%
±0.125%
±0.2%
±0.25%
48
48
48
36-75
36-75
36-75
50
50
50
±0.125% ±0.125%
Efficiency
Min.
90%
89%
89%
Typ.
91%
91%
92%
1.3x0.9x0.4
1.3x0.9x0.4
1.3x0.9x0.4
Dimensions
(inches)
Please refer to the Part Number Structure when ordering.
Regulation specifications describe output voltage deviations from a nominal/midpoint value to either
All specifications are typical at nominal line voltage and full load, +25°C unless otherwise noted.
extreme (50% load step).
See detailed specifications. Output capacitors are 1 μF ceramic multilayer in parallel with 10 μF and a
220uF/100V external input capacitor is needed for the ULS-12/8.3-D48 model.
I/O caps are necessary for our test equipment and may not be needed for your application.
PART NUMBER STRUCTURE
ULS
-
3.3
/
30
-
D48 N M H Lx
-
C
RoHS Hazardous Substance Compliance
(does not claim EU RoHS exemption 7b–lead in solder)
C = RoHS-6
Sixteenth Brick Series
Pin Length Option (Thru-hole only)
Blank = Standard pin length 0.180˝ (4.6mm)
L1 = 0.110˝ (2.79mm)*
L2 = 0.145˝ (3.68mm)*
*Special
quantity order is required;
Conformal Coating Option
no sample quantities available.
Blank = No coating, standard
H = Coating added, optional*
(H option is not available on SMT models.)
Maximum Rated Output Current
Current in Amps
Input Voltage Range:
D48 = 36-75 Volts (48V nominal)
SMT Version Option
Blank = Through-hole mount, no SMT
M = Surface mount (MSL Rating 2a,
Reflow temp ≤ 250°C)
On/Off Control Logic Option
N = Negative
P = Positive
Nominal Output Voltage:
Note:
Some model number combinations
may not be available. Contact Murata
Power Solutions.
www.murata-ps.com/support
MDC_ULS-100 Series.A01.D20
Page 2 of 28
ULS 100-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC-DC Converters
FUNCTIONAL SPECIFICATIONS, ULS-3.3/30-D48
ABSOLUTE
MAXIMUM RATINGS
Input Voltage, Continuous
Input Voltage, Transient
Isolation Voltage
Input Reverse Polarity
On/Off Remote Control
Output Power
Output Current
Conditions
➀
100 mS max. duration
Input to output, continuous
None, install external fuse
Power on, referred to -Vin
Minimum
0
Typical/Nominal
Maximum
80
100
2250
15
99.99
None
0
0
Units
Vdc
Vdc
Vdc
Vdc
Vdc
W
Current-limited, no damage, short-circuit
0
30
A
protected
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 Specifications Table is not implied or recommended.
INPUT
Operating voltage range
36
48
75
Vdc
Recommended External Fuse
Fast blow
10
A
Start-up threshold
Rising input voltage
32.5
34.5
35.5
Vdc
Undervoltage shutdown
Falling input voltage
31
33
34
Vdc
Overvoltage shutdown
None
Vdc
Reverse Polarity Protection
None, install external fuse
None
Vdc
Internal Filter Type
C
Input current
Full Load Conditions
Low Line
Inrush Transient
Short Circuit Input Currrent
No Load
Shut-Down Input Current (Off)
Reflected (back) ripple current
➁
Vin = nominal
Vin = minimum
Iout = minimum, unit = ON
Measured at input with specified filter
Vin = 48V, full load
Vin = max., full load
Input to output, continuous
90
89
2.27
3.06
0.05
50
50
14
20
91
90
2250
basic
100
3300
Yes
2.6
460
480
5
5
10
±75
2.31
3.12
100
150
18
30
A
A
A
2
-Sec.
mA
mA
mA
mA, p-p
%
%
Vdc
MΩ
pF
GENERAL and SAFETY
Efficiency
Isolation
Isolation Voltage
Insulation Safety Rating
Isolation Resistance
Isolation Capacitance
Safety
Calculated MTBF
Certified to UL-60950-1, CSA-C22.2 No.
60950-1, IEC/EN60950-1, 2nd edition
Per Telcordia SR332, issue 1, class 3, ground
fixed, Tambient = +25°C
Hours x 10
6
500
20
20
25
±150
KHz
mS
mS
μSec
mV
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
FEATURES
and OPTIONS
Remote On/Off Control
“N” suffix:
Negative Logic, ON state
Negative Logic, OFF state
Control Current
“P” suffix:
Positive Logic, ON state
Positive Logic, OFF state
Control Current
SMT Mounting
Remote Sense
ON = Ground pin or external voltage
OFF = Pin open or external voltage
Open collector/drain
ON = Pin open or external voltage
OFF = Ground pin or external voltage
Open collector/drain
"M" suffix
Sense pins connected externally to respective
Vout pins
-0.1
2.5
1
3.5
0
1
0.8
15
2
15
1
2
10
V
V
mA
V
V
mA
%
www.murata-ps.com/support
MDC_ULS-100 Series.A01.D20
Page 3 of 28
ULS 100-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC-DC Converters
FUNCTIONAL SPECIFICATIONS, ULS-3.3/30-D48 (CONT.)
OUTPUT
Total Output Power
Voltage
Nominal Output Voltage
Setting Accuracy
Output Voltage Range
Overvoltage Protection
Current
Output Current Range
Minimum Load
Current Limit Inception
Short Circuit
Short Circuit Current
Short Circuit Duration
(remove short for recovery)
Short circuit protection method
Regulation
Line Regulation
Load Regulation
Ripple and Noise
Temperature Coefficient
Maximum Capacitive Loading
Conditions
➀
See Derating
No trim
At 50% load, no trim
User-adjustable
Via magnetic feedback
Minimum
98.1
3.267
-1
-10
3.9
0
Typical/Nominal
99
3.3
Maximum
99.99
3.333
1
10
4.95
30
44
5
Units
W
Vdc
% of Vnom
% of Vnom.
Vdc
A
A
mA
4.25
30
37
2
Continuous
98% of Vnom., after warmup
Hiccup technique, autorecovery within
±1.25% of Vout
Output shorted to ground, no damage
Current limiting
Vin = min. to max., Vout = nom., Iout = nom.
Iout = min. to max., Vin = 48V
5 Hz- 20 MHz BW
At all outputs
Low ESR, resistive load only
33
70
±0.02
±0.1
±0.2
100
4700
% of Vout
% of Vout
mV pk-pk
% of Vout./°C
μF
Inches
mm
Ounces
Grams
Inches
mm
μ-inches
μ-inches
MECHANICAL
(Through Hole Models)
Outline Dimensions
(Please refer to outline drawing)
Weight
Through Hole Pin Diameter
Through Hole Pin Material
TH Pin Plating Metal and Thickness
LxWxH
Nickel subplate
Gold overplate
With Derating
No derating
Vin = Zero (no power)
Measured in center
External filter is required
-40
-40
-55
115
1.3X0.9X0.4
33X22.9X10.2
0.56
16
0.04 & 0.06
1.016X1.524
Copper alloy
50
5
85
120
125
130
ENVIRONMENTAL
Operating Ambient Temperature Range
Operating Case Temperature Range
Storage Temperature
Thermal Protection/Shutdown
Electromagnetic Interference
Conducted, EN55022/CISPR22
Radiated, EN55022/CISPR22
Relative humidity, non-condensing
Altitude
RoHS rating
125
B
B
°C
°C
°C
°C
Class
Class
%RH
feet
meters
To +85°C
must derate -1%/1000 feet
10
-500
-152
RoHS-6
90
10,000
3048
www.murata-ps.com/support
MDC_ULS-100 Series.A01.D20
Page 4 of 28
ULS 100-Watt Series
Functional Specification Notes
➀
All specifications are typical unless noted. Ambient temperature =
+25°Celsius, V
IN
is nominal, output current is maximum rated nominal.
External output capacitance is 1 μF multilayer ceramic paralleled with
10 μF electrolytic. All caps are low ESR. These capacitors are necessary for
our test equipment and may not be needed in your application.
Testing must be kept short enough that the converter does not appreciably
heat up during testing. For extended testing, use plenty of airflow. See
Derating Curves for temperature performance. All models are stable and
regulate within spec without external cacacitance.
➁
Sixteenth-brick DOSA-Compatible,
Isolated DC-DC Converters
➇
Do not exceed maximum power ratings, Sense limits or output overvoltage
when adjusting output trim values.
➈
At zero output current, Vout may contain components which slightly
exceed the ripple and noise specifications.
➉
Output overload protection is non-latching. When the output overload
is removed, the output will automatically recover.
11
All models are fully operational and meet published specifications,
including “cold start” at –40°C.
The converter will shut off if the input falls below the undervoltage thresh-
old. It will not restart until the input exceeds the Input Start Up Voltage.
Short circuit shutdown begins when the output voltage degrades approxi-
mately 2% from the selected setting.
Output noise may be further reduced by installing an external filter. See
the Application Notes. Use only as much output filtering as needed
and no
more.
Larger caps (especially low-ESR ceramic types) may slow transient
response or degrade dynamic performance. Thoroughly test your applica-
tion with all components installed.
To avoid damage or unplanned shutdown, do not sink appreciable reverse
output current.
A fast blow fuse must be installed in series with +Vin to avoid damage to
the converter in the event that the source voltage is accidentally applied to
the converter with reverse polarity.
Although extremely unlikely, failure of the internal components of this
product may expose external application circuits to dangerous voltages,
currents, temperatures or power levels. Please thoroughly verify all appli-
cations before committing them to service. Be sure to include appropri-
ately rated FUSES (see specifications and Application Notes) to reduce the
risk of failure.
If Sense is not wired to an external load, connect sense pins to their
respective Vout pins. Do not leave sense unconnected.
The switching frequencies of these converters are fixed; see individual
specifications for model details.
Input Ripple Current is tested and specified over a 5-20 MHz bandwidth
and uses a special set of external filters only for the Ripple Current speci-
fications. Input filtering is C
IN
= 33 μF, C
BUS
= 220 μF, L
BUS
= 12 μH. Use
capacitor rated voltages which are twice the maximum expected voltage.
Capacitors must accept high speed AC switching currents.
Note that Maximum Current Derating Curves indicate an average current
at nominal input voltage. At higher temperatures and/or lower airflow, the
converter will tolerate brief full current outputs if the average RMS current
over time does not exceed the Derating curve. All Derating curves are
presented at sea level altitude. Be aware of reduced power dissipation
with increasing density altitude.
Mean Time Before Failure (MTBF) is calculated using the Telcordia
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