ULS 30-Watt Series
www.murata-ps.com
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
FEATURES
n
Small footprint DC/DC converter, ideal for
embedded applications
n
1.30" x 0.90" x 0.36" open frame package
Typical units
n
Industry standard DOSA "brick" format
and pinout with surface mount option
n
2:1 Input Voltage Range (36V-75V, D48)
PRODUCT OVERVIEW
n
2250 Volt Basic input/output isolation
(48V models)
n
Up to 30 Watts total output power with
overtemperature shutdown
n
High efficiency synchronous rectifier forward
topology
n
Stable no-load operation with no required
external components
n
Operating temperature range -40 to +85°C
with derating
n
Certified to UL/EN/IEC 60950-1, CAN/CSA
C22.2 No. 60950-1, EN60950-1 safety
approvals, 2nd Edition
n
Extensive self-protection shut down features
F1
The world of “brick” DC/DC converters has seen
a steady size reduction. The ULS series makes another dramatic size shrink down to a “sixteenthbrick” width (0.91 inches) while still retaining up
to 30 Watt output and full 2250 Volt DC isolation.
The PC-board mount converter family accepts
36 to 75 Volts DC inputs and delivers fixed outputs
regulated to within ±0.125%. 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 -20% to
+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
Isolation
Barrier
+Vin (1)
+Vout (8)
• Switching
External
DC
Power
Source
On/Off
Control
(2)
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.
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 synchronous rectifier forward topology
yields high efficiency for minimal heat buildup and
“no fan” operation.
+Sense (7)*
• Filters
Controller
and Power
Transfer
Open = On
Closed = Off
(Positive
logic)
• Current Sense
-Sense (5)*
Reference and
Error Amplifier
-Vin (3)
Trim (6)
-Vout (4)
*Sense is included on the ULS-3.3/8-D48 and ULS-5/6-D48 only.
Figure 1. Simplified Block Diagram
Typical topology is shown
For full details go to
www.murata-ps.com/rohs
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MDC_ULS-30W_C10 Page 1 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE
Output
Root Model
ULS-3.3/8-D48
Vout
(V)
Iout
Power
(A, max.)
(W)
Input
R/N (mV pk-pk)
Typ.
Max.
Regulation (max.) ➂
Line
Load
Vin Nom.
(V)
Efficiency
Range
(V)
Iin, no load
(mA)
Iin, full
load (A)
Min.
Typ.
Case (inches)
3.3
8
26.5
90
130
±0.1%
±0.1%
48
36-75
75
0.58
89%
90%
1.30x0.90x0.36
ULS-5/6-D48
5
6
30
75
100
±0.125%
±0.1%
48
36-75
20
0.69
89%
91%
1.30x0.90x0.36
ULS-12/2.5-D48
12
2.5
30
130
150
±0.125%
±0.125%
48
36-75
25
0.71
86%
87.7%
1.30x0.90x0.36
ULS-15/2-D48
15
2
30
115
125
±0.125%
±0.125%
48
36-75
25
0.70
87.5%
89%
1.30x0.90x0.36
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. See
extreme (50% load step).
detailed specifications. Output capacitors are 1 μF ceramic multilayer in parallel with 10 μF electrolytic.
I/O caps are necessary for our test equipment and may not be needed for your application.
PART NUMBER STRUCTURE
ULS - 12 / 2.5 - D48 N M 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) ➀
L2 = 0.145˝ (3.68mm) ➀
Nominal Output Voltage:
SMT Version
Blank = Through-hole mount, no SMT
M = Surface mount (MSL Rating 2) ➁
Maximum Rated Output Current
Current in Amps
On/Off Control Logic:
N = Negative
P = Positive
Input Voltage Range:
D48 = 36-75 Volts (48V nominal)
➀ Special quantity order is required; samples available with standard pin length only.
➁ SMT (M) versions not available in sample quantities.
➂ Some model number combinations may not be available. See website or contact your local Murata sales representative.
To Be Discontinued *
NOTE: The following models are To Be Discontinued.
ULS-3.3/8-D48P-C
ULS-3.3/8-D48PM-C
ULS-5/6-D48P-C
ULS-5/6-D48PM-C
ULS-12/2.5-D48P-C
ULS-12/2.5-D48PM-C
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MDC_ULS-30W_C10 Page 2 of 30
* Last Time Buy date is 3/31/2019. Please click here to view the Discontinuance Notification.
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
FUNCTIONAL SPECIFICATIONS, ULS-3.3/8-D48
ABSOLUTE MAXIMUM RATINGS
Conditions ➀
Input Voltage, Continuous
Input Voltage, Transient
Isolation Voltage
Input Reverse Polarity
On/Off Remote Control
Output Power
Minimum
Typical/Nominal
0
100 mS max. duration
Input to output, continuous
None, install external fuse
Power on, referred to -Vin
Maximum
80
100
2250
None
0
0
15
26.66
Units
Vdc
Vdc
Vdc
Vdc
Vdc
W
Current-limited, no damage, short-circuit
0
8
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.
Output Current
INPUT
Conditions ➀ ➂
Operating voltage range
Recommended External Fuse
Start-up threshold
Undervoltage shutdown
Turn-On/Turn-Off Hysteresis
Overvoltage shutdown
Reverse Polarity Protection
Internal Filter Type
Input current
Full Load Conditions
Low Line
Inrush Transient
Output in Short Circuit
No Load
Shut-Down Input Current (Off, UV, OT)
Reflected (back) ripple current ➁
Fast blow
Rising input voltage
Falling input voltage
36
48
34
32
35.2
34
1.5
None
None
LC
None, install external fuse
Vin = nominal
Vin = minimum
0.58
0.77
0.05
50
75
1
30
Iout = minimum, unit = ON
Measured at input with specified filter
75
1.5
36
35.2
Vdc
A
Vdc
Vdc
Vdc
Vdc
Vdc
0.63
0.83
A
A
A2-Sec.
mA
mA
mA
mA, p-p
100
100
2
GENERAL and SAFETY
Efficiency
Isolation
Isolation Voltage
Insulation Safety Rating
Isolation Resistance
Isolation Capacitance
Safety
Calculated MTBF
Vin = 48V, full load
Vin = min., full load
89
89.5
Input to output, continuous
2250
90
90.5
%
%
Vdc
basic
10
MΩ
pF
1000
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
Yes
2
Hours x 106
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency
Startup Time
Startup Time
Dynamic Load Response
Dynamic Load Peak Deviation
320
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
350
380
50
50
KHz
mS
mS
100
150
µSec
±30
±100
mV
1.2
15
V
V
mA
15
1.2
V
V
mA
FEATURES and OPTIONS
Remote On/Off Control ➄
“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
ON = Ground pin or external voltage
OFF = Pin open or external voltage
Open collector/drain
-0.7
10
ON = Pin open or external voltage
OFF = Ground pin or external voltage
Open collector/drain
"M" suffix
10
-0.7
1
1
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MDC_ULS-30W_C10 Page 3 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
FUNCTIONAL SPECIFICATIONS, ULS-3.3/8-D48 (CONT.)
OUTPUT
Conditions ➀
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 ➅
Line Regulation
Load Regulation
Ripple and Noise
Temperature Coefficient
Maximum Capacitive Loading
Minimum
Typical/Nominal
Maximum
Units
See Derating
2.61
25
26.66
W
No trim
At 50% load, no trim
User-adjustable
Via magnetic feedback
3.2674
-1
-10
4.2
3.3
5
3.333
1
10
5.7
Vdc
% of Vnom
% of Vnom.
Vdc
0.8
8
8
A
8.5
10
11.3
A
0.3
mA
±0.1
±0.1
130
% of Vout
% of Vout
mV pk-pk
% of Vout./°C
μF
98% of Vnom., after warmup
Hiccup technique, autorecovery within ±1.25%
of Vout
Output shorted to ground, no damage
Continuous
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
MECHANICAL (Through Hole Models)
90
±0.02
2000
Conditions ➀ ➂
Outline Dimensions
(Please refer to outline drawing)
Weight
1.30x0.90x0.36
33.02x22.86x9.144
0.58
16.4
0.04 & 0.062
1.016 & 1.575
Copper alloy
50
5
LxWxH
Through Hole Pin Diameter
Through Hole Pin Material
TH Pin Plating Metal and Thickness
Nickel subplate
Gold overplate
Inches
mm
Ounces
Grams
Inches
mm
µ-inches
µ-inches
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
With Derating
No derating, full power, 200lfm, Vertical mount
Vin = Zero (no power)
Measured in center
External filter is required
-40
-40
-55
110
115
85
70
125
120
°C
°C
°C
°C
90
10,000
3048
Class
Class
%RH
feet
meters
B
B
To +85°C
must derate -1%/1000 feet
RoHS rating ➃
10
-500
-152
RoHS-6
Performance Specification Notes
➀ Unless otherwise noted, all specifications are typical at nominal input voltage, nominal output voltage
and full load. General conditions are +25° Celsius ambient temperature, near sea level altitude,
natural convection airflow. All models are tested and specified with external parallel 1 µF and 10 µF
multi-layer ceramic output capacitors. The external input capacitor is 22 µF ceramic. All capacitors
are low-ESR types wired close to the converter. These capacitors are necessary for our test equipment and may not be needed in the user's application.
➁ Input (back) ripple current is tested and specified over 5 Hz to 20 MHz bandwidth. Input filtering is
Cbus = 220 µF/100V, Cin = 33 µF/100V and Lbus = 12 µH.
➂ All models are stable and regulate to specification under no load.
➃ Reduction of Hazardous Substances (RoHS) compliance is to RoHS-6 (six substances restricted
including lead). See specifications.
➄ The Remote On/Off Control is referred to -Vin.
➅ Regulation specifications describe the output voltage changes as the line voltage or load current is
varied from its nominal or midpoint value to either extreme.
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MDC_ULS-30W_C10 Page 4 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
TYPICAL PERFORMANCE CURVES, ULS-3.3/8-D48
92
90
88
86
84
82
80
78
76
74
72
70
68
66
64
Maximum Current Temperature Derating at Sea Level
(Vin = 36-75V, airflow is from pin 1 to pin 3)
8
Output Current (Amps)
Efficiency (%)
Efficiency vs. Line Voltage and Load Current @ 25°C
VIN = 75V
VIN = 60V
VIN = 48V
VIN = 36V
6
5
4
3
2
1
0
0.00
0.81
1.61
2.41
0.33 to 2.0 m/s (65 to 400 LFM)
7
3.21
4.01
4.81
Load Current (Amps)
5.61
6.41
7.21
30
8.01
35
40
45
50
55
60
65
Ambient Temperature (ºC)
70
75
80
85
INFRARED THERMAL IMAGE, ULS-3.3/8-D48
Thermal image with hot spot at full load current with 25°C ambient temperature. Natural convention is used with no forced airflow. Identifiable and recommended maximum value
to be verified in application. Vin=48V, Q7 max temp=120°C/IPC9592 guidelines.
(+Vin)
(+Vout)
(-Vin)
(-Vout)
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MDC_ULS-30W_C10 Page 5 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
OSCILLOGRAMS, ULS-3.3/8-D48
On/Off Enable Delay (Vin=36V, vout=nom, Iout=8A, Cload =1uF || 10uF, Ta=+25°C,
ScopeBW=20Mhz) Trace 1= Enable, Trace 3= Vout.
On/Off Enable Delay (Vin=75V, vout=nom, Iout=8A, Cload =1uF || 10uF, Ta=+25°C,
ScopeBW=20Mhz) Trace 1= Enable, Trace 3= Vout.
Startup Delay (Vin=48V, Vout=nom, Iout=8A, Cload= 1uF || 10 uF, Ta=+25°C,
ScopeBW=20Mhz) Trace 1= Vin, Trace3, Vout.
Startup Delay (Vin=48V, Vout=nom, Iout=8A, Cload= 1uF || 10 uF & 2000uF, Ta=+25°C,
ScopeBW=20Mhz) Trace 1= Vin, Trace3, Vout.
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MDC_ULS-30W_C10 Page 6 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
OSCILLOGRAMS, ULS-3.3/8-D48
Step Load Transient Response (Vin=48V, Vout=nom, Iout=50-100-50% of full load,
Cload= 1uF || 10uF, Ta=+25°C, ScopeBW=20Mhz)
Step Load Transient Response (Vin=48V, Vout=nom, Iout=50-75-50% of full load,
Cload= 1uF || 10uF, Ta=+25°C, ScopeBW=20Mhz)
Output Ripple and Noise (Vin=48V, Vout=nom, Iout=8A, Cload= 1uF || 10uF, Ta=+25°C,
ScopeBW=20Mhz)
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MDC_ULS-30W_C10 Page 7 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
FUNCTIONAL SPECIFICATIONS, ULS-5/6-D48
ABSOLUTE MAXIMUM RATINGS
Conditions ➀
Input Voltage, Continuous
Input Voltage, Transient
Isolation Voltage
Input Reverse Polarity
On/Off Remote Control
Output Power
Minimum
Typical/Nominal
0
100 mS max. duration
Input to output, continuous
None, install external fuse
Power on, referred to -Vin
Maximum
80
100
2250
None
0
0
15
30.3
Units
Vdc
Vdc
Vdc
Vdc
Vdc
W
Current-limited, no damage, short-circuit
0
6
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.
Output Current
INPUT
Conditions ➀ ➂
Operating voltage range
Recommended External Fuse
Start-up threshold
Undervoltage shutdown
Turn-On/Turn-Off Hysteresis
Overvoltage shutdown
Reverse Polarity Protection
Internal Filter Type
Input current
Full Load Conditions
Low Line
Inrush Transient
Output in Short Circuit
No Load
Shut-Down Input Current (Off, UV, OT)
Reflected (back) ripple current ➁
Fast blow
Rising input voltage
Falling input voltage
36
48
32.5
31
1.62
35
33.5
1.67
None
None
LC
None, install external fuse
Vin = nominal
Vin = minimum
0.69
0.92
0.05
10
20
1
30
Iout = minimum, unit = ON
Measured at input with specified filter
75
2
35.9
34
1.72
Vdc
A
Vdc
Vdc
Vdc
Vdc
Vdc
0.71
0.95
A
A
A2-Sec.
mA
mA
mA
mA, p-p
100
60
3
GENERAL and SAFETY
Efficiency
Isolation
Isolation Voltage
Insulation Safety Rating
Isolation Resistance
Isolation Capacitance
Safety
Calculated MTBF
Vin = 48V, full load
Vin = min., full load
89
89
Input to output, continuous
2250
91
91
%
%
Vdc
basic
10
3300
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
MΩ
pF
Yes
TBD
Hours x 106
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency
Startup Time
Startup Time
Dynamic Load Response
Dynamic Load Peak Deviation
325
Power on to Vout regulated
Remote ON to Vout regulated
50-75-50% load step, settling time to within
1% of Vout
same as above
355
10
10
385
40
40
KHz
mS
mS
75
100
µSec
±150
mV
FEATURES and OPTIONS
Remote On/Off Control ➄
“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
ON = Ground pin or external voltage
OFF = Pin open or external voltage
Open collector/drain
-0.1
2.5
ON = Pin open or external voltage
OFF = Ground pin or external voltage
Open collector/drain
“M” suffix
10
0
0.8
15
V
V
mA
15
0.7
V
V
mA
1
1
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MDC_ULS-30W_C10 Page 8 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
FUNCTIONAL SPECIFICATIONS, ULS-5/6-D48 (CONT.)
OUTPUT
Conditions ➀
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 ➅
Line Regulation
Load Regulation
Ripple and Noise
Temperature Coefficient
Maximum Capacitive Loading
No trim
At 50% load, no trim
User-adjustable
Via magnetic feedback
98% of Vnom., after warmup
Minimum
Typical/Nominal
Maximum
Units
0
30
30.3
W
4.95
-1
-10
6
5
6.5
5.05
1
10
7.2
Vdc
% of Vnom
% of Vnom.
Vdc
0
6
6
A
6.5
7.5
8.25
A
0.3
A
±0.125
±0.1
100
% of Vout
% of Vout
mV pk-pk
% of Vout./°C
μF
Hiccup technique, autorecovery within ±1.25%
of Vout
Output shorted to ground, no damage
Continuous
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
MECHANICAL (Through Hole Models)
75
±0.02
2000
Conditions ➀ ➂
Outline Dimensions
(Please refer to outline drawing)
Weight
1.30x0.90x0.36
33.02x22.86x9.144
0.58
16.4
0.04 & 0.062
1.016 & 1.575
Copper alloy
50
5
LxWxH
Through Hole Pin Diameter
Through Hole Pin Material
TH Pin Plating Metal and Thickness
Nickel subplate
Gold overplate
Inches
mm
Ounces
Grams
Inches
mm
µ-inches
µ-inches
ENVIRONMENTAL
Operating Ambient Temperature Range
Operating Case Temperature Range
Storage Temperature
Thermal Protection/Shutdown
Electromagnetic Interference
Conducted, EN55022/CISPR22
Radiated, EN55022/CISPR22
RoHS rating ➃
With Derating
No derating, full power, 200lfm, Vertical mount
Vin = Zero (no power)
Measured in center
External filter is required
-40
-40
-55
110
115
B
B
RoHS-6
85
70
125
120
°C
°C
°C
°C
Class
Class
Performance Specification Notes
➀ Unless otherwise noted, all specifications are typical at nominal input voltage, nominal output voltage
and full load. General conditions are +25° Celsius ambient temperature, near sea level altitude,
natural convection airflow. All models are tested and specified with external parallel 1 µF and 10 µF
multi-layer ceramic output capacitors. The external input capacitor is 22 µF ceramic. All capacitors
are low-ESR types wired close to the converter. These capacitors are necessary for our test equipment and may not be needed in the user's application.
➁ Input (back) ripple current is tested and specified over 5 Hz to 20 MHz bandwidth. Input filtering is
Cbus = 220 µF/100V, Cin = 33 µF/100V and Lbus = 12 µH.
➂ All models are stable and regulate to specification under no load.
➃ Reduction of Hazardous Substances (RoHS) compliance is to RoHS-6 (six substances restricted
including lead). See specifications.
➄ The Remote On/Off Control is referred to -Vin.
➅ Regulation specifications describe the output voltage changes as the line voltage or load current is
varied from its nominal or midpoint value to either extreme.
www.murata-ps.com/support
MDC_ULS-30W_C10 Page 9 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
TYPICAL PERFORMANCE CURVES, ULS-5/6-D48
Maximum Current Temperature Derating at Sea Level
(Vin = 36-75V, airflow is from pin 3 to pin 1)
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
7
6
Output Current (Amps)
Efficiency (%)
Efficiency vs. Line Voltage and Load Current @ 25°C
VIN = 75V
VIN = 60V
VIN = 48V
VIN = 36V
0.33 to 2.0 m/s (65 to 400 LFM)
5
4
3
2
1
0
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
30
35
6.0
40
45
50
55
60
65
Ambient Temperature (ºC)
70
75
80
85
Load Current (Amps)
Power Dissipation vs. Load Current @ 25°C
Current Limit
5.5
3.5
5
4.5
3.0
Loss (Watts)
4
2.5
3.5
3
2.0
VIN = 75V
VIN = 60V
VIN = 48V
VIN = 36V
1.5
1.0
VIN = 75V
2.5
VIN = 60V
2
VIN = 36V
1.5
VIN = 48V
1
0.5
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Load Current (Amps)
4.5
5.0
5.5
6.0
0
7.0
7.2
7.4
7.6
7.8
Output Load Current (Amps)
8.0
8.2
INFRARED THERMAL IMAGE, ULS-5/6-D48
Thermal image with hot spot at full current with 25°C ambient temperature. Natural convention is used with no forced airflow. Identifiable and recommended maximum value to
be verified in application. Vin=48V, Q7 max temp=120°C/IPC9592 guidelines.
91.5°C
(+Vin)
(+Vout)
90
Q6: 81.3
Q7: 82.9
T1: 78.1
80
R4: 80.1
R20: 82.3
70
60
(-Vin)
(-Vout)
50
47.9°C
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MDC_ULS-30W_C10 Page 10 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
OSCILLOGRAMS, ULS-5/6-D48
Startup Delay (Vin=48V, Iout=6A, Cload=0, Ta=+25°C) Trace1=Vin, Trace4=Vout.
Startup Delay (Vin=48V, Iout=6A, Cload=2200uF, Ta=+25°C) Trace1=Vin, Trace4=Vout
On/Off Enable Delay (Vin=48V, Iout=6A, Cload=0, Ta=+25°C)
Trace1=Enable, Trace4=Vout
On/Off Enable Delay (Vin=48V, Iout=6A, Cload=2000uF, Ta=+25°C)
Trace1=Enable, Trace4=Vout
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MDC_ULS-30W_C10 Page 11 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
OSCILLOGRAMS, ULS-5/6-D48
Output Ripple and Noise (Vin=48V, Iout=0A, Cload= 1uF || 10uf, Ta=+25°C)
Output Ripple and Noise (Vin=48V, Iout=6A, Cload= 1uF || 10uf, Ta=+25°C)
Step Load Transient Response (Vin=48V, Iout=50-75-50% of Imax,
Cload= 1uf || 10uF, Ta=+25°C)
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MDC_ULS-30W_C10 Page 12 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
FUNCTIONAL SPECIFICATIONS, ULS-12/2.5-D48
ABSOLUTE MAXIMUM RATINGS
Conditions ➀
Input Voltage, Continuous
Input Voltage, Transient
Isolation Voltage
Input Reverse Polarity
On/Off Remote Control
Output Power
Minimum
Typical/Nominal
0
100 mS max. duration
Input to output, continuous
None, install external fuse
Power on, referred to -Vin
Maximum
80
100
2250
None
0
0
15
30
Units
Vdc
Vdc
Vdc
Vdc
Vdc
W
Current-limited, no damage, short-circuit
0
2.5
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.
Output Current
INPUT
Conditions ➀ ➂
Operating voltage range
Recommended External Fuse
Start-up threshold
Undervoltage shutdown
Turn-On/Turn-Off Hysteresis
Overvoltage shutdown
Reverse Polarity Protection
Internal Filter Type
Input current
Full Load Conditions
Low Line
Inrush Transient
Output in Short Circuit
No Load
Shut-Down Input Current (Off, UV, OT)
Reflected (back) ripple current ➁
Fast blow
Rising input voltage
Falling input voltage
36
48
32.5
31
1.40
33.5
32
1.46
None
None
Capacitive
None, install external fuse
Vin = nominal
Vin = minimum
0.71
0.95
0.05
100
25
5
15
Iout = minimum, unit = ON
Measured at input with specified filter
75
2
35.5
33
1.52
Vdc
A
Vdc
Vdc
Vdc
Vdc
Vdc
0.73
0.97
A
A
A2-Sec.
mA
mA
mA
mA, p-p
200
50
10
30
GENERAL and SAFETY
Efficiency
Isolation
Isolation Voltage
Insulation Safety Rating
Isolation Resistance
Isolation Capacitance
Safety
Calculated MTBF
Vin = 48V, full load
Vin = min., full load
86.0
85.5
Input to output, continuous
2250
87.7
87.5
%
%
Vdc
basic
100
1600
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
MΩ
pF
Yes
3
Hours x 106
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency
Startup Time
Startup Time
Dynamic Load Response
Dynamic Load Peak Deviation
260
Power on to Vout regulated
Remote ON to Vout regulated
50-75-50% load step, settling time to within
1% of Vout
same as above
285
310
30
30
KHz
mS
mS
200
300
µSec
±250
±300
mV
1
0.8
15
2
V
V
mA
1
15
0.7
2
V
V
mA
FEATURES and OPTIONS
Remote On/Off Control ➄
“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
ON = Ground pin or external voltage
OFF = Pin open or external voltage
Open collector/drain
-0.1
2.5
ON = Pin open or external voltage
OFF = Ground pin or external voltage
Open collector/drain
"M" suffix
10
0
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MDC_ULS-30W_C10 Page 13 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
FUNCTIONAL SPECIFICATIONS, ULS-12/2.5-D48 (CONT.)
OUTPUT
Conditions ➀
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 ➅
Line Regulation
Load Regulation
Ripple and Noise
Temperature Coefficient
Maximum Capacitive Loading
Minimum
Typical/Nominal
Maximum
Units
See Derating
0
30
30
W
No trim
At 50% load, no trim
User-adjustable
Via magnetic feedback
11.88
-1
-20
13.3
12.00
12.12
+1
+10
18
Vdc
% of Vnom
% of Vnom.
Vdc
0.0
2.5
No minimum load
3.5
2.5
A
4.5
A
40
mA
±0.125
±0.125
150
% of Vout
% of Vout
mV pk-pk
% of Vout./°C
μF
98% of Vnom., after warmup
3.3
15
Hiccup technique, autorecovery within ±1.25%
of Vout
Output shorted to ground, no damage
Continuous
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
MECHANICAL (Through Hole Models)
Outline Dimensions
(Please refer to outline drawing)
Weight
0
Conditions ➀ ➂
1.30x0.90x0.36
33.02x22.86x9.144
0.58
16.4
0.04 & 0.062
1.016 & 1.575
Copper alloy
50
5
LxWxH
Through Hole Pin Diameter
Through Hole Pin Material
TH Pin Plating Metal and Thickness
130
±0.02
2200
Nickel subplate
Gold overplate
Inches
mm
Ounces
Grams
Inches
mm
µ-inches
µ-inches
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
With Derating
No derating, full power
Vin = Zero (no power)
Measured in center
External filter is required
-40
-40
-55
115
125
85
105
125
130
°C
°C
°C
°C
90
10,000
3048
Class
Class
%RH
feet
meters
B
B
To +85°C
must derate -1%/1000 feet
RoHS rating ➃
10
-500
-152
RoHS-6
Performance Specification Notes
➀ Unless otherwise noted, all specifications are typical at nominal input voltage, nominal output voltage
and full load. General conditions are +25° Celsius ambient temperature, near sea level altitude,
natural convection airflow. All models are tested and specified with external parallel 1 µF and 10 µF
multi-layer ceramic output capacitors. The external input capacitor is 22 µF ceramic. All capacitors
are low-ESR types wired close to the converter. These capacitors are necessary for our test equipment and may not be needed in the user's application.
➁ Input (back) ripple current is tested and specified over 5 Hz to 20 MHz bandwidth. Input filtering is
Cbus = 220 µF/100V, Cin = 33 µF/100V and Lbus = 12 µH.
➂ All models are stable and regulate to specification under no load.
➃ Reduction of Hazardous Substances (RoHS) compliance is to RoHS-6 (six substances restricted
including lead). See specifications.
➄ The Remote On/Off Control is referred to -Vin.
➅ Regulation specifications describe the output voltage changes as the line voltage or load current is
varied from its nominal or midpoint value to either extreme.
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MDC_ULS-30W_C10 Page 14 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
TYPICAL PERFORMANCE CURVES, ULS-12/2.5-D48
Efficiency vs. Line Voltage and Load Current @ 25°C
Power Dissipation vs. Load Current @ 25°C
89
4.5
87
4.0
3.5
Loss (Watts)
Efficiency (%)
85
83
81
79
VIN = 75V
VIN = 60V
VIN = 48V
VIN = 36V
77
75
0.25
0.48
0.70
0.93
3.0
2.5
2.0
VIN = 75V
VIN = 60V
VIN = 48V
VIN = 36V
1.5
1.0
1.15
1.38
1.60
Load Current (Amps)
1.83
2.05
2.28
0.5
0.3
2.50
0.9
1.2
1.4
1.6
Load Current (Amps)
1.8
2.1
2.3
2.5
3.0
2.5
Output Current (Amps)
3.0
Output Current (Amps)
0.7
Maximum Current Temperature Derating at Sea Level
(Vin = 60V, airflow is from pin 3 to pin 1)
Maximum Current Temperature Derating at Sea Level
(Vin = 36V, 48V, and 75V, airflow is from pin 3 to pin 1)
2.0
0.5
0.33 to 2.0 m/s (65 to 400 LFM)
30
35
40
45
50
55
60
65
Ambient Temperature (ºC)
70
75
80
85
2.5
0.33 m/s (65 LFM)
0.5 to 2.0 m/s (100 to 400 LFM)
2.0
30
35
40
45
50
55
60
65
Ambient Temperature (ºC)
70
75
80
85
INFRARED THERMAL IMAGE, ULS-12/2.5-D48
Thermal image with hot spot at full load current with 25 °C ambient temperature. Natural convention is used with no forced airflow. Identifiable and recommended maximum value
to be verified in application. Vin=48V, Q6 max Temp=120 °C/IPC9592 guidelines.
(+Vin)
(+Vout)
99.5°C
L1: 77.3
80
T1: 79.4
CR17: 94.3
60
Q6: 94.7
R6: 92.4
(-Vin)
(-Vout)
42.4°C
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MDC_ULS-30W_C10 Page 15 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
OSCILLOGRAMS, ULS-12/2.5-D48
On/Off Enable Delay (Vin = 48V, Vout = nom., Iout = 2.5A, Cload = 0 µF, Ta = +25°C.,
ScopeBW = 20MHz) Trace 1 = Enable, Trace 4 = Vout
Power On Startup Delay (Vin = 48V, Vout = nom., Iout = 2.5A, Cload = 0 µF, Ta = +25°C.,
ScopeBW = 20MHz) Trace 1 = Vin, Trace 4 = Vout
Step Load Transient Response (Vin = 48V, Vout = nom., Iout = 50-75-50% of full load,
Cload = 1 µF ceramic || 10µF tantalum, Ta = +25°C., ScopeBW = 20MHz)
Output Ripple and Noise (Vin = 48V, Vout = nom., Iout = no load, Cload = 1 µF ceramic ||
10µF tantalum, Ta = +25°C., ScopeBW = 20MHz)
Output Ripple and Noise (Vin = 48V, Vout = nom., Iout = 2.5A, Cload = 1 µF ceramic || 10µF
tantalum, Ta = +25°C., ScopeBW = 20MHz)
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MDC_ULS-30W_C10 Page 16 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
FUNCTIONAL SPECIFICATIONS, ULS-15/2-D48
ABSOLUTE MAXIMUM RATINGS
Conditions ➀
Input Voltage, Continuous
Input Voltage, Transient
Isolation Voltage
Input Reverse Polarity
On/Off Remote Control
Output Power
Minimum
Typical/Nominal
0
100 mS max. duration
Input to output, continuous
None, install external fuse
Power on, referred to -Vin
Maximum
80
100
2250
None
0
0
15
30
Units
Vdc
Vdc
Vdc
Vdc
Vdc
W
Current-limited, no damage, short-circuit
0
2
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.
Output Current
INPUT
Conditions ➀ ➂
Operating voltage range
Recommended External Fuse
Start-up threshold
Undervoltage shutdown
Turn-On/Turn-Off Hysteresis
Overvoltage shutdown
Reverse Polarity Protection
Internal Filter Type
Input current
Full Load Conditions
Low Line
Inrush Transient
Output in Short Circuit
No Load
Shut-Down Input Current (Off, UV, OT)
Reflected (back) ripple current ➁
Fast blow
Rising input voltage
Falling input voltage
36
48
32.5
31
1.42
33.5
32
1.48
None
None
Capacitive
None, install external fuse
Vin = nominal
Vin = minimum
0.7
0.94
0.05
100
25
5
15
Iout = minimum, unit = ON
Measured at input with specified filter
75
2
35.5
33
1.52
Vdc
A
Vdc
Vdc
Vdc
Vdc
Vdc
0.714
0.95
A
A
A2-Sec.
mA
mA
mA
mA, p-p
200
50
10
30
GENERAL and SAFETY
Efficiency
Isolation
Isolation Voltage
Insulation Safety Rating
Isolation Resistance
Isolation Capacitance
Safety
Calculated MTBF
Vin = 48V, full load
Vin = min., full load
87.5
87.5
Input to output, continuous
2250
89.0
89.0
%
%
Vdc
basic
100
1600
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
MΩ
pF
Yes
3
Hours x 106
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency
Startup Time
Startup Time
Dynamic Load Response
Dynamic Load Peak Deviation
280
Power on to Vout regulated
Remote ON to Vout regulated
50-75-50% load step, settling time to within
1% of Vout
same as above
290
310
30
30
KHz
mS
mS
200
300
µSec
±250
±300
mV
1
0.8
15
2
V
V
mA
1
15
0.7
2
V
V
mA
FEATURES and OPTIONS
Remote On/Off Control ➄
“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
ON = Ground pin or external voltage
OFF = Pin open or external voltage
Open collector/drain
-0.1
2.5
ON = Pin open or external voltage
OFF = Ground pin or external voltage
Open collector/drain
"M" suffix
10
0
www.murata-ps.com/support
MDC_ULS-30W_C10 Page 17 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
FUNCTIONAL SPECIFICATIONS, ULS-15/2-D48 (CONT.)
OUTPUT
Conditions ➀
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 ➅
Line Regulation
Load Regulation
Ripple and Noise
Temperature Coefficient
Maximum Capacitive Loading
Minimum
Typical/Nominal
Maximum
Units
See Derating
0
30
30
W
No trim
At 50% load, no trim
User-adjustable
Via magnetic feedback
14.85
-1
-20
18
15.00
15.15
+1
+10
20
Vdc
% of Vnom
% of Vnom.
Vdc
0.0
2.0
No minimum load
3.0
2.0
A
3.45
A
0.6
A
±0.125
±0.125
125
% of Vout
% of Vout
mV pk-pk
% of Vout./°C
μF
98% of Vnom., after warmup
2.45
19
Hiccup technique, autorecovery within ±1.25%
of Vout
Output shorted to ground, no damage
Continuous
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
MECHANICAL (Through Hole Models)
Outline Dimensions
(Please refer to outline drawing)
Weight
0
Conditions ➀ ➂
1.30x0.90x0.36
33.02x22.86x9.144
0.58
16.4
0.04 & 0.062
1.016 & 1.575
Copper alloy
50
5
LxWxH
Through Hole Pin Diameter
Through Hole Pin Material
TH Pin Plating Metal and Thickness
115
±0.02
2200
Nickel subplate
Gold overplate
Inches
mm
Ounces
Grams
Inches
mm
µ-inches
µ-inches
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
With Derating
No derating, full power
Vin = Zero (no power)
Measured in center
External filter is required
-40
-40
-55
115
125
85
105
125
130
°C
°C
°C
°C
90
10,000
3048
Class
Class
%RH
feet
meters
B
B
To +85°C
must derate -1%/1000 feet
RoHS rating ➃
10
-500
-152
RoHS-6
Performance Specification Notes
➀ Unless otherwise noted, all specifications are typical at nominal input voltage, nominal output voltage
and full load. General conditions are +25° Celsius ambient temperature, near sea level altitude,
natural convection airflow. All models are tested and specified with external parallel 1 µF and 10 µF
multi-layer ceramic output capacitors. The external input capacitor is 22 µF ceramic. All capacitors
are low-ESR types wired close to the converter. These capacitors are necessary for our test equipment and may not be needed in the user's application.
➁ Input (back) ripple current is tested and specified over 5 Hz to 20 MHz bandwidth. Input filtering is
Cbus = 220 µF/100V, Cin = 33 µF/100V and Lbus = 12 µH.
➂ All models are stable and regulate to specification under no load.
➃ Reduction of Hazardous Substances (RoHS) compliance is to RoHS-6 (six substances restricted
including lead). See specifications.
➄ The Remote On/Off Control is referred to -Vin.
➅ Regulation specifications describe the output voltage changes as the line voltage or load current is
varied from its nominal or midpoint value to either extreme.
www.murata-ps.com/support
MDC_ULS-30W_C10 Page 18 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
TYPICAL PERFORMANCE CURVES, ULS-15/2-D48
Efficiency vs. Line Voltage and Load Current @ 25°C
Power Dissipation vs. Load Current @ 25°C
91
3.5
89
3.0
Loss (Watts)
Efficiency (%)
87
85
VIN = 75V
VIN = 60V
VIN = 48V
VIN = 36V
83
81
79
2.5
2.0
VIN = 75V
VIN = 60V
VIN = 48V
VIN = 36V
1.5
1.0
77
75
0.21
0.39
0.57
0.75
0.93
1.11
1.29
Load Current (Amps)
1.47
1.65
1.83
2.01
0.5
0.2
0.4
0.6
0.7
0.9
1.1
1.3
Load Current (Amps)
1.5
1.6
1.8
2.0
Maximum Current Temperature Derating at Sea Level
(Vin = 36V, 48V, 60V, and 75V, airflow is from pin 3 to pin 1)
Output Current (Amps)
2.5
2.0
1.5
0.33 to 2.0 m/s (65 to 400 LFM)
30
35
40
45
50
55
60
65
Ambient Temperature (ºC)
70
75
80
85
INFRARED THERMAL IMAGE, ULS-15/2-D48
Thermal image with hot spot at full load current with 25 °C ambient temperature. Natural convention is used with no forced airflow. Identifiable and recommended maximum value
to be verified in application. Vin=48V, Q6 max Temp=120 °C/IPC9592 guidelines.
80.6°C
80
(+Vin)
(+Vout)
70
T1: 62
60
Q6: 75
R6: 73
(-Vin)
(-Vout)
50
45.7°C
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MDC_ULS-30W_C10 Page 19 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
OSCILLOGRAMS, ULS-15/2-D48
On/Off Enable Delay (Vin = 48V, Vout = nom., Iout = 2A, Cload = 0 µF, Ta = +25°C.,
ScopeBW = 20MHz) Trace 1 = Enable, Trace 4 = Vout
Power On Startup Delay (Vin = 48V, Vout = nom., Iout = 2A, Cload = 0 µF, Ta = +25°C.,
ScopeBW = 20MHz) Trace 1 = Vin, Trace 4 = Vout
Step Load Transient Response (Vin = 48V, Vout = nom., Iout = 50-75-50% of full load,
Cload = 1 µF ceramic || 10µF tantalum, Ta = +25°C., ScopeBW = 20MHz)
Output Ripple and Noise (Vin = 48V, Vout = nom., Iout = no load, Cload = 1 µF ceramic ||
10µF tantalum, Ta = +25°C., ScopeBW = 20MHz)
Output Ripple and Noise (Vin = 48V, Vout = nom., Iout = 2A, Cload = 1 µF ceramic || 10µF
tantalum, Ta = +25°C., ScopeBW = 20MHz)
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MDC_ULS-30W_C10 Page 20 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
MECHANICAL SPECIFICATIONS, THROUGH-HOLE MOUNT
SIDE VIEW
END VIEW
0.36
(9.144)
0.18
(4.572)
00.060 @
PINS 4 & 8
0.010 MIN
CLEARANCE
FINISH: (ALL PINS)
GOLD (5u"MIN) OVER NICKEL (50u" MIN)
0.040 @
PINS 1-3, 5-7
BOTTOM PIN VIEW
PIN
#3
1.30
(33.02)
PIN
#8
1.100
(27.94)
PIN
#4
3
0.90
(22.86)
ISOMETRIC VIEW
4
5*
0.300
(7.62)
6
2
0.300
(7.62)
7*
0.150
(3.81)
0.150
(3.81)
Pin
3
CL
2
8
1
0.550
(13.97)
1
CL
The 0.18-inch pin length is shown. Please refer to the
part number structure for alternate pin lengths.
Pin material: Copper alloy. Plating: Gold over nickel
(PRI)
.048-.062
0.92
(23.4)
0.46
(11.7)
CL
Please note that some competitive units may use different pin numbering or alternate outline views; however, all
units are plugin-compatible.
Top View
(PER IPC-D-275, LEVEL C)
(SEC)
1.100
(27.94)
1
0.300
(7.62)
7*
2
6
3
It is recommended that no parts be placed beneath
the converter.
0.150
(3.80)
8
0.300
(7.62)
5*
0.100 MIN
ANNULAR RING
FOR ALL PIN
SHOULDERS
INPUT/OUTPUT CONNECTIONS P75
Function
Pin
Function
-Vin
4
-Vout
5
(-)Sense
On/Off Control 6
Trim
7
(+)Sense
+Vin
8
+Vout
*Sense is included on the ULS-3.3/8-D48 and
ULS-5/6-D48 only.
Recommended Footprint
(View Through Converter)
FINISHED HOLE SIZES
@ PINS 1-3, 5-7
MATERIAL:
.040 PINS: COPPER ALLOY
.062 PINS: COPPER ALLOY
Dimensions are in inches (mm shown for ref. only).
CL
Third Angle Projection
4
0.150
(3.80)
0.55
(14.0)
CL
1.32
(33.5)
FINISHED HOLE SIZES
@ PINS 4 & 8
(PER IPC-D-275, LEVEL C)
It is recommended that no parts be placed beneath converter
.070-.084
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚
Components are shown for reference only.
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MDC_ULS-30W_C10 Page 21 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
MECHANICAL SPECIFICATIONS, SURFACE MOUNT (MSL RATING 2)
SIDE VIEW
END VIEW
0.36
.36
(9.144)
0.010 MIN
CLEARANCE
0.062 TYP
(ALL PINS)
0.125
REF
MATERIAL:
SMT CONTACTS: COPPER ALLOY
FINISH: (ALL PINS)
GOLD (5u"MIN) OVER NICKEL (50u" MIN)
BOTTOM PIN VIEW
1.30
(33.02)
1.100
(27.94)
3
0.90
(22.86)
0.300
(7.62)
PIN
#8
4
0.300
(7.62)
5*
6
2
0.150
(3.81)
7*
PIN
#4
CL
0.150
(3.81)
8
1
Pin
3
0.550
(13.97)
CL
2
1
Recommended Footprint
(View Through Converter)
(SEC)
1.100
(27.94)
0.92
(23.4)
CL
8
1
0.300
(7.62)
6
5*
3
It is recommended that no parts be placed
beneath the converter.
0.150
(3.80)
7*
2
INPUT/OUTPUT CONNECTIONS P75
Function
Pin
Function
-Vin
4
-Vout
5
(-)Sense
On/Off Control 6
Trim
7
(+)Sense
+Vin
8
+Vout
Please note that some competitive units may use
different pin numbering or alternate outline views;
however, all units are plugin-compatible.
Top View
(PRI)
0.46
(11.7)
ISOMETRIC VIEW
0.300
(7.62)
Sense is included on the ULS-3.3/8-D48 and
ULS-5/6-D48 only.
CL
Dimensions are in inches (mm shown for ref. only).
Third Angle Projection
4
0.150
(3.80)
0.55
(14.0)
CL
1.32
(33.5)
0.070 MIN PAD
(6 or 8 PLS
AS REQUIRED)
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚
Components are shown for reference only.
It is recommended that no parts be placed beneath converter
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MDC_ULS-30W_C10 Page 22 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
SHIPPING TRAYS AND BOXES, THROUGH-HOLE MOUNT
4.50 (114.3) ±.25
Closed height
11.00 (279.4) ±.25
32 units per tray
4 trays per box
10.50 (266.7) ±.25
Each static dissipative polyethylene foam tray accommodates 32 converters in a 4 x 8 array.
SHIPPING TRAY DIMENSIONS
Material: Low density, closed cell polyethylene anti-static foam
9.84
(250.00)
9.84
(250.00)
0.47
(12.00)
4-C 0.26
(6.5)
0.87
(22.00)
0.59
(15.00)
1
.3
R0 .00)
(8
1.34
(34.00)
1.97
(50.00)
0.31
(8.00)
0.51
(13.00)
0.91
(23.00)
0.24
(6.00)
Dimensions are in inches (mm shown for ref. only).
Third Angle Projection
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 1˚
Components are shown for reference only.
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MDC_ULS-30W_C10 Page 23 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
TAPE AND REEL INFORMATION (MSL RATING 2)
Feed (Unwind)
Direction ----
0.14
(3.556)
Pin #1
0.069
(1.75)
Round
Holes
0.85
(21.59)
1.732
(44.00)
0.354 (9.00) MAX
PICKUP NOZZLE
1.26
(32.0)
PITCH
Oblong
Holes
Top Cover Tape
13.00
(330.20)
TAPE AND REEL
(200 UNITS
PER REEL)
.512
(13.00)
4.00
(101.60)
CORE
1.73
(44.0)
REF
Dimensions are in inches (mm shown for ref. only).
Third Angle Projection
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 1˚
Components are shown for reference only.
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MDC_ULS-30W_C10 Page 24 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
TECHNICAL NOTES
Input Fusing
Certain applications and/or safety agencies may require the installation of
fuses at the inputs of power conversion components. Fuses should also be
used if the possibility of sustained, non-current-limited, input-voltage polarity
reversals exists. For DATEL ULS series DC/DC converters, we recommend the
use of a fast blow fuse, installed in the ungrounded input supply line with a
typical value about twice the maximum input current, calculated at low line
with the converter’s minimum efficiency.
All relevant national and international safety standards and regulations must
be observed by the installer. For system safety agency approvals, the converters must be installed in compliance with the requirements of the end- use
safety standard, i.e. IEC/EN/UL60950-1.
Input Reverse-Polarity Protection
If the input voltage polarity is accidentally reversed, an internal diode will
become forward biased and likely draw excessive current from the power
source. If this source is not current limited or the circuit appropriately fused, it
could cause permanent damage to the converter.
Input Under-Voltage Shutdown and Start-Up Threshold
Under normal start-up conditions, devices will not begin to regulate properly
until the ramping-up input voltage exceeds the Start-Up Threshold Voltage.
Once operating, devices will not turn off until the input voltage drops below the
Under-Voltage Shutdown limit. Subsequent re-start will not occur until the input
is brought back up to the Start-Up Threshold. This built in hysteresis prevents
any unstable on/off situations from occurring at a single input voltage.
Start-Up Time
The VIN to VOUT Start-Up Time is the time interval between the point at which
the ramping input voltage crosses the Start-Up Threshold and the fully loaded
output voltage enters and remains within its specified accuracy band. Actual
measured times will vary with input source impedance, external input capacitance, and the slew rate and final value of the input voltage as it appears at the
converter. The ULS Series implements a soft start circuit to limit the duty cycle
of its PWM controller at power up, thereby limiting the input inrush current.
The On/Off Control to VOUT start-up time assumes the converter has its
nominal input voltage applied but is turned off via the On/Off Control pin. The
specification defines the interval between the point at which the converter is
turned on (released) and the fully loaded output voltage enters and remains
within its specified accuracy band. Similar to the VIN to VOUT start-up, the On/Off
Control to VOUT start-up time is also governed by the internal soft start circuitry
and external load capacitance. The difference in start up time from VIN to VOUT
and from On/Off Control to VOUT is therefore insignificant.
Input Source Impedance
The input of ULS converters must be driven from a low ac-impedance source.
The DC/DC’s performance and stability can be compromised by the use of
highly inductive source impedances. The input circuit shown in Figure 2 is a
practical solution that can be used to minimize the effects of inductance in the
input traces. For optimum performance, components should be mounted close
to the DC/DC converter.
I/O Filtering, Input Ripple Current, and Output Noise
All models in the ULS Series are tested/specified for input reflected ripple
current and output noise using the specified external input/output components/
circuits and layout as shown in the following two figures. External input capacitors (CIN in Figure 2) serve primarily as energy-storage elements, minimizing line voltage variations caused by transient IR drops in conductors from
backplane to the DC/DC. Input caps should be selected for bulk capacitance
(at appropriate frequencies), low ESR, and high rms-ripple-current ratings. The
switching nature of DC/DC converters requires that dc voltage sources have
low ac impedance as highly inductive source impedance can affect system stability. In Figure 2, CBUS and LBUS simulate a typical dc voltage bus. Your specific
system configuration may necessitate additional considerations.
TO
OSCILLOSCOPE
+VIN
LBUS
+
VIN
CURRENT
PROBE
CBUS
CIN
–
–VIN
CIN = 33µF, ESR < 700mΩ @ 100kHz
CBUS = 220µF, ESR < 100mΩ @ 100kHz
LBUS = 12µH
Figure 2. Measuring Input Ripple Current
In critical applications, output ripple/noise (also referred to as periodic and
random deviations or PARD) may be reduced below specified limits using filtering techniques, the simplest of which is the installation of additional external
output capacitors. They function as true filter elements and should be selected
for bulk capacitance, low ESR and appropriate frequency response.
All external capacitors should have appropriate voltage ratings and be
located as close to the converter as possible. Temperature variations for all
relevant parameters should also be taken carefully into consideration. The most
effective combination of external I/O capacitors will be a function of line voltage
and source impedance, as well as particular load and layout conditions.
Floating Outputs
Since these are isolated DC/DC converters, their outputs are “floating” with
respect to their input. Designers will normally use the –Output as the ground/
return of the load circuit. You can however, use the +Output as ground/return to
effectively reverse the output polarity.
Minimum Output Loading Requirements
ULS converters employ a synchronous-rectifier design topology and all models
regulate within spec and are stable under no-load to full load conditions.
Operation under no-load conditions however might slightly increase the output
ripple and noise.
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MDC_ULS-30W_C10 Page 25 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
Short Circuit Condition
When a converter is in current-limit mode, the output voltage will drop as the
output current demand increases. If the output voltage drops too low, the magnetically coupled voltage used to develop primary side voltages will also drop,
thereby shutting down the PWM controller. Following a time-out period, the
PWM will restart causing the output voltage to begin ramping to their appropriate value. If the short-circuit condition persists, another shutdown cycle will be
initiated. This on/off cycling is referred to as “hiccup” mode. The hiccup cycling
reduces the average output current, thereby preventing internal temperatures
from rising to excessive levels. The ULS Series is capable of enduring an
indefinite short circuit output condition.
+VOUT
C1
C2
SCOPE
RLOAD
–VOUT
C1 = 1µF
C2 = 10µF
LOAD 2-3 INCHES (51-76mm) FROM MODULE
Figure 3. Measuring Output Ripple/Noise (PARD)
Thermal Shutdown
The ULS converters are equipped with thermal-shutdown circuitry. If environmental conditions cause the temperature of the DC/DC converter to rise above
the designed operating temperature, a precision temperature sensor will power
down the unit. When the internal temperature decreases below the threshold
of the temperature sensor, the unit will self start. See Performance/Functional
Specifications.
Output Over-Voltage Protection
The ULS output voltage is monitored for an over-voltage condition using a comparator. The signal is optically coupled to the primary side and if the output voltage rises to a level which could be damaging to the load, the sensing circuitry
will power down the PWM controller causing the output voltage to decrease.
Following a time-out period the PWM will restart, causing the output voltage
to ramp to its appropriate value. If the fault condition persists, and the output
voltage again climbs to excessive levels, the over-voltage circuitry will initiate
another shutdown cycle. This on/off cycling is referred to as “hiccup” mode.
Current Limiting
As soon as the output current increases to approximately 130% of its rated
value, the DC/DC converter will go into a current-limiting mode. In this condition, the output voltage will decrease proportionately with increases in output
current, thereby maintaining somewhat constant power dissipation. This is
commonly referred to as power limiting. Current limit inception is defined
as the point at which the full-power output voltage falls below the specified
tolerance. See Performance/Functional Specifications. If the load current, being
drawn from the converter, is significant enough, the unit will go into a short
circuit condition as described below.
+VOUT
–VIN
ON/OFF
CONTROL
+VIN
On/Off Control
The input-side, remote On/Off Control function can be ordered to operate with
either logic type:
Positive ("P" suffix) logic models are enabled when the on/off pin is
left open (or is pulled high, applying +10V to +15V with respect to –Input).
Positive-logic devices are disabled when the on/off pin is pulled low (0 to 0.7V
with respect to –Input).
Negative (“N” suffix) logic devices are off when pin is left open (or pulled
high, applying +2.5V to +15V), and on when pin is pulled low (-0.1 to 0.8V)
with respect to –Input as shown in Figure 4.
Dynamic control of the remote on/off function is best accomplished with a
mechanical relay or an open-collector/open-drain drive circuit (optically isolated
if appropriate). The drive circuit should be able to sink appropriate current (see
Performance Specifications) when activated and withstand appropriate voltage
when deactivated. Applying an external voltage to pin 2 when no input power is
applied to the converter can cause permanent damage to the converter.
+VIN
+Vcc
13V CIRCUIT
ON/OFF
CONTROL
–VIN
Figure 4. Driving the Negative Logic On/Off Control Pin (simplified circuit)
+VOUT
–VIN
TRIM
LOAD
RTRIM UP
–VOUT
Figure 5. Trim Connections To Increase Output Voltages.
If units have sense pins, Connect trim to + Sense pin.
5V CIRCUIT
ON/OFF
CONTROL
+VIN
RTRIM DOWN
TRIM
LOAD
–VOUT
Figure 6. Trim Connections To Decrease Output Voltages.
If units have sense pins, connect Trim to (-) Sense pins.
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MDC_ULS-30W_C10 Page 26 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
Remote Sense (ULS-3.3/8-D48 and ULS-5/6-D48 models only)
Note: The Sense and VOUT lines are internally connected through low-value
resistors. Nevertheless, if the sense function is not used for remote regulation the user should connect the +Sense to +VOUT and –Sense to –VOUT at
the DC/DC converter pins. ULS series converters employ a sense feature to
provide point of use regulation, thereby overcoming moderate IR drops in PCB
conductors or cabling. The remote sense lines carry very little current and
therefore require minimal cross-sectional-area conductors. The sense lines,
which are capacitively coupled to their respective output lines, are used by
the feedback control-loop to regulate the output. As such, they are not low
impedance points and must be treated with care in layouts and cabling. Sense
lines on a PCB should be run adjacent to dc signals, preferably ground.
[VOUT(+)-VOUT(–)] – [Sense(+)-Sense(–)] ≤ 10%VOUT
In cables and discrete wiring applications, twisted pair or other techniques
should be used. Output over-voltage protection is monitored at the output voltage pin, not the Sense pin. Therefore, excessive voltage differences between
VOUT and Sense in conjunction with trim adjustment of the output voltage can
cause the over-voltage protection circuitry to activate (see Performance Specifications for over-voltage limits). Power derating is based on maximum output
current and voltage at the converter’s output pins. Use of trim and sense functions can cause output voltages to increase, thereby increasing output power
beyond the converter’s specified rating, or cause output voltages to climb into
the output over-voltage region. Therefore, the designer must ensure:
Trim Equations
Trim Down
511
RT DOWN (kΩ) =
Where ∆% =
|( V
∆%
– 10.22
– VDES
× 100
VNOM
NOM
)|
Trim Up
RT UP (kΩ) =
5.11 × VNOM × (100 + ∆%)
1.225 × ∆%
–
511
∆%
– 10.22
Note: “∆%” is always a positive value.
“VNOM” is the nominal, rated output voltage.
“VDES” is the desired, changed output voltage.
(VOUT at pins) x (IOUT) ≤ rated output power
Contact and PCB resistance
losses due to IR drops
+VOUT
+VIN
IOUT
+SENSE
Sense Current
ON/OFF
CONTROL
TRIM
LOAD
Sense Return
–SENSE
IOUT Return
–VIN
–VOUT
Contact and PCB resistance
losses due to IR drops
Figure 7. Remote Sense Circuit Configuration
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MDC_ULS-30W_C10 Page 27 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
Trimming by Using an External Voltage Source
1. The easiest way to trim the output using an external voltage source is to
drive the Trim pin directly from a variable source. The following equation can
be used to calculate the voltage at the Trim pin.
Vtrim = 2 x 1.24 x
Vo
Vonominal
− 1.24
Vo is the output voltage you want; Vonominal is the nominal output voltage;
Vtrim is the voltage that should appear at the trim pin.
2. If the purpose of trimming is to compensate voltage drop of power path
from converter to the Load, you may separately connect the sense pin directly
to the load. It’s much easier than real time adjusting trim voltage.
+VIN
+VOUT
External
source
+SENSE
ON/OFF
CONTROL
TRIM
+
–
LOAD
–SENSE
–VIN
–VOUT
Figure 8. Trimming with an external source
3. CAUTION: To avoid unplanned power down cycles, do not exceed EITHER
the maximum output voltage OR the maximum output power when setting
the trim. If the output voltage is excessive, the OVP circuit may shut down the
converter. If the maximum power is exceeded, the converter may enter current
limiting. If the power is exceeded for an extended period, the converter may
overheat and encounter overtemperature shut down. Be careful of external
electrical noise. The Trim input is a sensitive input to the converter’s feedback
control loop. Excessive electrical noise may cause instability or oscillation.
Through-hole Soldering Guidelines
SMT Reflow Soldering Guidelines
Murata Power Solutions recommends the TH soldering specifications below when installing these converters. These specifications vary depending on the solder type. Exceeding
these specifications may cause damage to the product. Your production environment may
differ; therefore please thoroughly review these guidelines with your process engineers.
The surface-mount reflow solder profile shown below is suitable for SAC305 type leadfree solders. This graph should be used only as a guideline. Many other factors influence
the success of SMT reflow soldering. Since your production environment may differ,
please thoroughly review these guidelines with your process engineers.
Wave Solder Operations for through-hole mounted
products (THMT)
For Sn/Ag/Cu based solders:
Maximum Preheat Temperature
115° C.
Maximum Pot Temperature
270° C.
Maximum Solder Dwell Time
7 seconds
For Sn/Pb based solders:
Maximum Preheat Temperature
105° C.
Maximum Pot Temperature
250° C.
Maximum Solder Dwell Time
6 seconds
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MDC_ULS-30W_C10 Page 28 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
Emissions Performance
Murata Power Solutions measures its products for radio frequency emissions
against the EN 55022 and CISPR 22 standards. Passive resistance loads are
employed and the output is set to the maximum voltage. If you set up your
own emissions testing, make sure the output load is rated at continuous power
while doing the tests.
[4] Conducted Emissions Test Results
The recommended external input and output capacitors (if required) are
included. Please refer to the fundamental switching frequency. All of this
information is listed in the Product Specifications. An external discrete filter is
installed and the circuit diagram is shown below.
Test Card
Resistive Load
C4
L2
DC Source V+
Black
C1
C2
UUT
C3
Vin+
Vout+
C6
L1
V-
Vin-
Resistive Load
inside a metal
container
Graph 1. ULS-3.3/8-D48N-C conducted emissions performance, Peak Detection Mode,
CISPR/EN55022, Class B, full load at 48Vin
Vout-
C5
Figure 9. Conducted Emissions Test Circuit
[1] Conducted Emissions Parts List
Reference
Part Number
L1
L2
PE-62913
NC
C1, C2
VZ Series
C3
VZ Series
C4, C5
Unknown
C6
VZ Series
Description
1mH, 6A
4.7uH, 3.6A
Ceramic Capacitor
(3.2uf) = 2.2ufd/1ufd in
parallel, 100V
Qty 2 - Electrolytic Capacitor
22ufd, 100V
3.3nF, 1500V
Electrolytic Capacitor 33ufd,
100V
Vendor
Pulse
Murata
Panasonic
Panasonic
Unknown
Panasonic
[2] Conducted Emissions Test Equipment Used
Rohde & Schwarz EMI Test Receiver (9KHz – 1000MHz) ESPC
Rohde & Schwarz Software ESPC-1 Ver. 2.20
HP11947A Transient Limiter (Agilent)
OHMITE 25W – Resistor combinations
DC Source Programmable DC Power Supply Model 62012P-100-50
Graph 2. ULS-12/2.5-D48N-C conducted emissions performance, Peak Detection Mode,
CISPR/EN55022, Class B, full load at 48Vin
[3] Layout Recommendations
Most applications can use the filtering which is already installed inside the
converter or with the addition of the recommended external capacitors. For
greater emissions suppression, consider additional filter components and/or
shielding. Emissions performance will depend on the user’s PC board layout,
the chassis shielding environment and choice of external components. Please
refer to Application Note GEAN-02 for further discussion.
Since many factors affect both the amplitude and spectra of emissions, we
recommend using an engineer who is experienced at emissions suppression.
Graph 3. ULS-15/2-D48P-C conducted emissions performance, Peak Detection Mode,
CISPR/EN55022, Class B, full load at 48Vin
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MDC_ULS-30W_C10 Page 29 of 30
ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
Vertical Wind Tunnel
IR Transparent
optical window
Unit under
test (UUT)
Variable
speed fan
Murata Power Solutions employs a computer controlled
custom-designed closed loop vertical wind tunnel, infrared
video camera system, and test instrumentation for accurate
airflow and heat dissipation analysis of power products.
The system includes a precision low flow-rate anemometer,
variable speed fan, power supply input and load controls,
temperature gauges, and adjustable heating element.
The IR camera monitors the thermal performance of the
Unit Under Test (UUT) under static steady-state conditions. A
special optical port is used which is transparent to infrared
wavelengths.
IR Video
Camera
Precision
low-rate
anemometer
3” below UUT
Ambient
temperature
sensor
Airflow
collimator
Figure 10. Vertical Wind Tunnel
Murata Power Solutions, Inc.
129 Flanders Road, Westborough, MA 01581 U.S.A.
ISO 9001 and 14001 REGISTERED
Heating
element
Both through-hole and surface mount converters are
soldered down to a host carrier board for realistic heat
absorption and spreading. Both longitudinal and transverse
airflow studies are possible by rotation of this carrier board
since there are often significant differences in the heat
dissipation in the two airflow directions. The combination of
adjustable airflow, adjustable ambient heat, and adjustable
Input/Output currents and voltages mean that a very wide
range of measurement conditions can be studied.
The collimator reduces the amount of turbulence adjacent
to the UUT by minimizing airflow turbulence. Such turbulence influences the effective heat transfer characteristics
and gives false readings. Excess turbulence removes more
heat from some surfaces and less heat from others, possibly
causing uneven overheating.
Both sides of the UUT are studied since there are different
thermal gradients on each side. The adjustable heating element
and fan, built-in temperature gauges, and no-contact IR camera mean
that power supplies are tested in real-world conditions.
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: http://www.murata-ps.com/requirements/
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change
without notice.
© 2018 Murata Power Solutions, Inc.
www.murata-ps.com/support
MDC_ULS-30W_C10 Page 30 of 30
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