ULT-12/2.5-D48N-C [MURATA]
民用设备,工业设备;型号: | ULT-12/2.5-D48N-C |
厂家: | muRata |
描述: | 民用设备,工业设备 |
文件: | 总26页 (文件大小:2156K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
ULT Series
s
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
FEATURES
2:1 Input Voltage Range (36V – 75V, 48 Volts,
Typical units
nominal)
Up to 30W output power @ 36 – 48 – 75Vin
89% efficiency (typical, 5Vout)
PRODUCT OVERVIEW
Through-hole and optional SMT package
The ULT Series isolated DC/DC converter repre-
sents the next generation converters in a 1/32
brick package. This converter is the “industry-
standard” 1/32 brick form factor (0.92" x 0.75"
x 0.35"). The product fully complies with RoHS-6
directive.
The thirty-second brick is offered as an open
frame module; mounting options include through-
hole or surface mount (SMT) pinouts. Typical
applications include Optical Networking Equipment,
Wireless Base Station applications, Microwave
Radio communications, and Telecom and Data
Equipment applications.
Modules will supply an output power of up to
30 watts over the input range of 36-75V. The ULT
Series also provides a cost effective approach to
highly efficient systems requiring 12V, 5V, and 3.3V
voltages, eliminating the requirement for a “Bus
Converter” and multiple PoL converters. The ULT
family provides basic insulation with 1500Vdc iso-
lation meeting the requirements of UL/IEC 60950.
The ULT series modules are DOSA compatible
industry standard 1/32 brick.
Miniature 1/32 brick open frame package
Positive & Negative Logic On/Off control option
Over-current & Over-temperature protection
Low output ripple and noise
Strong thermal derating characteristics
Operational Temperature Range –40°C to +85°C
1500V I/O isolation
Tight line/load regulation
Certified to UL/IEC 60950-1, CAN/CSA C22.2 No.
60950-1, safety approvals, 2nd Edition
*TPMBUJPO
F1
+Vin (1)
+Vout (8)
Barrier
tꢀ4XJUDIJOH
tꢀ'JMUFST
ꢁ4FOTFꢀꢂꢃꢄ
External
DC
Power
Source
On/Off
Control
(2)
Controller
and Power
5SBOTGFS
tꢀ$VSSFOUꢀ4FOTF
ꢅ4FOTFꢀꢂꢆꢄ
Trim (6)
Open = On
$MPTFEꢀꢇꢀ0GG
ꢂ1PTJUJWFꢀ
polarity)
Reference and
Error Amplifier
-Vin (3)
-Vout (4)
Figure 1. Connection Diagram
Typical topology is shown. Murata Power
Solutions recommends an external fuse.
For full details go to
www.murata-ps.com/rohs
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MDC_ULT Series.F05 Page 1 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE
Output
Input
Efficiency
Package
R/N (mV pk-pk) Regulation (max.)
Root Model
VOUT
(V) (A, max.)
IOUT
Power
(W)
VIN Nom. Range IIN, no load
IIN, full
load (A)
(V)
(V)
(mA)
Typ.
45
Max.
50
Line
Load
Min.
84%
87%
90%
Typ.
Case (inches)
ULT-3.3/7.5-D48
ULT-5/5-D48
3.3
5
7.5
5
24.75
25
0.15%
0.1%
0.2%
48
48
48
36-75
36-75
36-75
20
20
20
0.6
85.5% 0.92 x 0.75 x 0.35
50
75
0.125%
0.125%
0.59
0.68
89%
92%
0.92 x 0.75 x 0.35
0.92 x 0.75 x 0.35
ULT-12/2.5-D48
12
2.5
30
70
100
0.075%
Please refer to the Part Number Structure when ordering.
is measured with 188μF. Output caps are necessary for our test equipment and may
not be needed for your application.
Regulation specifications describe output voltage deviations from a nominal/midpoint
value to either extreme (50% load step).
All specifications are typical at nominal line voltage and full load, +25°C unless
otherwise noted. See detailed specifications. External input capacitors are
33μF electrolytic and three 1μF ceramic. Output ripple is measured with 400μF
capacitance across output pins for the 3.3Vout and 5Vout model. The 12Vout model
PART NUMBER STRUCTURE
ULT - 3.3 / 7.5 - D48 N M Lx - C
Thirty-second-brick series (Unipolar)
RoHS Hazardous Substance Compliance
(does not claim EU RoHS exemption 7b–lead in solder)
C = RoHS-6
Pin Length Option (Thru-hole only)
Blank = Standard pin length 0.190˝ (4.8mm)
Nominal Output Voltage
L1 = 0.110˝ (2.79mm) ➀
L2 = 0.145˝ (3.68mm) ➀
SMT Version Option
Blank = Through-hole mount, no SMT
Maximum Rated Output Current
Current in Amps
M = Surface mount (MSL Rating 2) ➁
Input Voltage Range
D48 = 36-75 Volts (48V nominal)
On/Off Control Logic Option
N = Negative
P = Positive
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.
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MDC_ULT Series.F05 Page 2 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
FUNCTIONAL SPECIFICATIONS (ULT-3.3/7.5-D48-C)
ABSOLUTE MAXIMUM RATINGS
Input Voltage, Continuous
Minimum
Typical/Nominal
Maximum
Units
Vdc
Conditions ➀
Full temperature range
36
80
Operating or non-operating, 100 mS max.
duration
15
100
Vdc
Input Voltage, Transient
Isolation Voltage
Input to output tested
None, install external fuse
Power on or off, referred to -Vin
1500
Vdc
Vdc
Vdc
W
Input Reverse Polarity
On/Off Remote Control
Output Power
none
15
25
Output Current
Storage Temperature Range
Current-limited, no damage, short-circuit protected
Vin = Zero (no power)
7.5
125
A
°C
-40
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
Conditions ➀ ➂
Operating voltage range
36
48
2
33.3
31.75
1.3
N/A
75
Vdc
A
13
Fast blow
Rising input voltage
Falling input voltage
Recommended External Fuse
Start-up threshold
32.5
30.75
1.22
34.5
32.75
1.32
Vdc
Vdc
Vdc
Vdc
Vdc
11
Undervoltage lockout (@ ½ load)
Turn-On/Turn-Off Hysteresis
Overvoltage shutdown
Reverse Polarity Protection
Internal Filter Type
Rising input voltage
None, install external fuse
None
Capacitive
Input current
Full Load Current Conditions
Low Line Input Currrent
Inrush Transient
Short Circuit input current
No Load input current
Vin = nominal
Vin = minimum
Vin = 48V
0.6
0.8
0.05
0.04
20
0.62
0.83
A
A
A2-Sec.
mA
mA
0.1
40
10
Iout = minimum, unit=ON
Shut-Down Mode input current (Off, UV, OT)
6
mA
Measured at input with specified filter
30
mA, pk-pk
Reflected (back) ripple current ➁
GENERAL and SAFETY
Vin=48V
Vin=36V
84
83.5
85.5
85.5
%
%
Efficiency
Isolation
Isolation Voltage, Input to Output
Insulation Safety Rating
Isolation Resistance
Isolation Capacitance
Safety
1500
basic
Vdc
10
MΩ
pF
1700
Yes
UL-60950-1, CSA-C22.2 No.60950-1,
IEC/60950-1, 2nd edition
(certified to the following requirements)
Per Telcordia SR332, issue 1, class 3, ground
fixed, Tambient=+25°C
TBD
287
Hours x 103
Calculated MTBF ➃
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency
Startup Time
250
320
50
50
KHz
mS
mS
ꢀSec
mV
Power On, to Vout regulation band, 100%
Remote ON to Vout Regulated
50-75-50% load step to 1% of Vout
same as above
Startup Time
Dynamic Load Response
Dynamic Load Peak Deviation
FEATURES and OPTIONS
75
100
150
Remote On/Off Control ➅
"N" suffix
Negative Logic, ON state
Negative Logic, OFF state
Control Current
ON = pin grounded or external voltage
OFF = pin open or external voltage
open collector/drain
-0.7
10
1.0
15
Vdc
Vdc
mA
1
1
"P" suffix
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
15
1.0
V
V
mA
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MDC_ULT Series.F05 Page 3 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
FUNCTIONAL SPECIFICATIONS (ULT-3.3/7.5-D48-C, CONT.)
OUTPUT
Minimum
Typical/Nominal
Maximum
Units
Conditions ➀
Total Output Power
Voltage
0
24.75
25
W
Nominal Output Voltage
Setting Accuracy
Output Trim Range ➇
Overvoltage Protection
Current
3.2505
-1.5
-20
3.3
3.35
1.5
10
Vdc
Vdc
% of Vout
Vdc
At 50% load
User selectable (see trim formulas)
3.9
4.6
Output Current Range
Minimum Load
Current Limit Inception ➈
Short Circuit
0
7.5
7.5
A
A
no minimal load required
98% of Vnom., after warmup
8.8
10.8
12.5
Hiccup technique, autorecovery within 1.25%
of Vout
Short Circuit Current
0.3
A
Short Circuit Duration (remove short for
recovery)
Short circuit protection method
Output shorted to ground, no damage
Hiccup current limiting
Continuous
Non-latching
Regulation ➆
Line Regulation
Load Regulation
Vin=min. to max., Vout=nom., full load
Iout=min. to max., Vin=nom.
Tested with eight 47ꢀF ceramic caps in parallel
At all outputs
0.15
0.2
50
% of Vout
% of Vout
mV pk-pk
% of Vout./°C
μF
% of Vout
Units
Inches
12
45
0.02
Ripple and Noise
Temperature Coefficient
Maximum Capacitive Loading
Remote Sense Compliance
MECHANICAL (Through Hole Models)
Outline Dimensions
Low ESR
400
5,000
10
Maximum
Vsense = Vout - Vload, sense connected at load
Conditions ➀ ➂
Minimum
Typical/Nominal
0.92 x 0.75 x 0.35
23.4x19.05x8.89
0.32
(Please refer to outline drawing)
Weight
LxWxH
mm
Ounces
Grams
9.07
Through Hole Pin Diameter
.04 & .062
1.02 & 1.57
Brass
Inches
mm
Through Hole Pin Material
TH Pin Plating Metal and Thickness
Nickel subplate
Gold overplate
50
3-5
ꢀ-inches
ꢀ-inches
ENVIRONMENTAL
See derating curves
Vin = Zero (no power)
-40
-55
120
85
125
140
°C
°C
°C
Operating Ambient Temperature Range ➉
Storage Temperature
Thermal Protection/Shutdown
Electromagnetic Interference
Conducted, EN55022/CISPR22
RoHS rating
130
External filter is required
B
Class
RoHS-6
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MDC_ULT Series.F05 Page 4 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
Performance Specification Notes
➀
All specifications are typical unless noted. Ambient temperature =
+25°Celsius, VIN is nominal, output current is maximum rated nominal.
External output capacitance consists of 400ꢀF capacitors across output
pins; one 33ꢀF low ESR, and three 1ꢀF external input capacitors. All caps
are low ESR.
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.
➆
Regulation specifications describe the deviation as the input line voltage
or output load current is varied from a nominal midpoint value to either
extreme (50% load).
➇
➈
➉
11
Do not exceed maximum power ratings, sense limits or output overvoltage
when adjusting output trim values.
Output overload protection is non-latching. When the output overload
is removed, the output will automatically recover.
All models are fully operational and meet published specifications,
including “cold start” at –40°C.
➁
➂
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 CIN = 33 ꢀF, CBUS = 220 ꢀF, LBUS = 12 ꢀH. Use
capacitor rated voltages which are twice the maximum expected voltage.
Capacitors must accept high speed AC switching currents.
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.
12
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.
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.
13
14
If reverse polarity is accidentally applied to the input, always connect an
external fast blow input fuse in series with the +VIN input.
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 ap-
plications before committing them to service. Be sure to include appropri-
ately rated FUSES (see specifications and Application Notes) to reduce the
risk of failure.
➃
➄
Mean Time Before Failure (MTBF) is calculated using the Telcordia (Bel-
core) SR-332 Method 1, Case 3, Issue 1, ground fixed conditions. Operat-
ing temperature = +25°C, full output load, natural air convection.
The output may be shorted to ground indefinitely with no damage. The
Output Short Circuit Current shown in the specifications is an average con-
sisting of very short bursts of full rated current to test whether the output
circuit can be repowered.
15
Special care should be exercised so that Input Voltage Transient does not
exceed specified Max 100V/100ms. At normal input a large transient spike
can be generated as a result of distribution inductance and high inrush
current charging input cap on converter. This can be eliminated with 33ꢀF
electrolytic capacitor mounted close to Converter input. The series resis-
tance (500mꢁ < ESR < 700mꢁ) is essential in this solution.
➅
The On/Off pin allows the converter to be turned on or off by an external
device such as a switch, a transistor, a logic gate, or an optical isolator.
If the “logic pin” is left floating the measured voltage will be outside the
limit's in the data sheet. Those numbers define the levels needed for the
“control function” to take place and do not represent the voltage that may
be present on the logic pin.
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MDC_ULT Series.F05 Page 5 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
TYPICAL PERFORMANCE DATA, ULT-3.3/7.5-D48-C
Efficiency vs. Line Voltage and Load Current @ 25°C
Power Dissipation @ 25°C
86
85
84
83
4.50
4.25
4.00
3.75
3.50
3.25
3.00
2.75
2.50
2.25
2.00
1.75
1.50
VIN = 36V
VIN = 48V
VIN = 60V
VIN = 75V
VIN = 36V
VIN = 48V
VIN = 60V
VIN = 75V
82
81
80
79
78
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
2.50
3.50
5.50
7.00
7.50
Amps
Load Current (Amps)
Maximum Current Temperature Derating at sea level
Vin = 36V (air flow from Pin 3 to Pin 1 on PCB)
Maximum Current Temperature Derating at sea level
Vin = 48V (air flow from Pin 3 to Pin 1 on PCB)
8
7
6
5
4
3
8
7
6
5
4
3
0.33 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
0.33 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
30
35
40
45
50
55
60
65
70
75
80
85
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (°C)
Ambient Temperature (°C)
Maximum Current Temperature Derating at sea level
Vin = 60V (air flow from Pin 3 to Pin 1 on PCB)
Maximum Current Temperature Derating at sea level
Vin = 75V (air flow from Pin 3 to Pin 1 on PCB)
8
7
6
5
4
3
8
7
6
5
4
3
0.33 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
0.33 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
30
35
40
45
50
55
60
65
70
75
80
85
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (°C)
Ambient Temperature (°C)
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MDC_ULT Series.F05 Page 6 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
TYPICAL PERFORMANCE DATA, ULT-3.3/7.5-D48-C
On/Off Enable Delay Startup (Vin=48V, Vout=3.3V, Iout=7.5A,
Cload=400uF, Ta=+25°C) Ch1=Enable, Ch4=Vout
Vin Startup Delay (Vin=48V, Vout=3.3V, Iout=7.5A, Cload=400uF, Ta=+25°C)
Ch1=Vin, Ch4=Vout
Output Ripple and Noise (Vin=48V, Iout=7.5A, Cload=0, 4x100ꢀF caps,
Ta=+25°C, ScopeBW=20Mhz
Output Ripple and Noise (Vin=48V, Iout=0A, Cload=0, 4x100ꢀF caps,
Ta=+25°C, ScopeBW=20Mhz)
Stepload Transient Response (Vin=48V, Iout=50-75-50% of Imax,
Cload=4x100ꢀF, Ta=+25°C)
Thermal image with hot spot at full load current with 25°C ambient temperature. Natural
convection is used with no forced airflow. Identifiable and recommended maximum value
to be verified in application. Vin=48V, Q8 max Temp=104°C.
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MDC_ULT Series.F05 Page 7 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
FUNCTIONAL SPECIFICATIONS (ULT-5/5-D48-C)
ABSOLUTE MAXIMUM RATINGS
Minimum
Typical/Nominal
Maximum
Units
Conditions ➀
Input Voltage, Continuous
Full temperature range
Operating or non-operating, 100 mS max.
duration
36
80
Vdc
15
100
Vdc
Input Voltage, Transient
Isolation Voltage
Input to output tested
None, install external fuse
Power on or off, referred to -Vin
1500
Vdc
Vdc
Vdc
W
A
°C
Input Reverse Polarity
On/Off Remote Control
Output Power
Output Current
Storage Temperature Range
none
0
0
0
15
25.25
5
Current-limited, no damage, short-circuit protected
Vin = Zero (no power)
-55
125
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
Conditions ➀ ➂
Operating voltage range
Recommended External Fuse
36
48
2
75
Vdc
A
Fast blow
12
Rising input voltage
Falling input voltage
32
33.25
34.25
34
1.61
Vdc
Start-up threshold
11
30.8
1.03
32.5
1.31
N/A
N/A
Capacitive
Vdc
Vdc
Vdc
Vdc
Undervoltage lockout (@ ½ load)
Turn-On/Turn-Off Hysteresis
Overvoltage shutdown
Reverse Polarity Protection
Internal Filter Type
Rising input voltage
None, install external fuse
Input current
Full Load Conditions
Low Line
Inrush Transient
Short Circuit input current
No Load input current
Shut-Down Mode input current (Off, UV, OT)
Vin = nominal
Vin = minimum
0.59
0.79
0.05
50
20
1
0.6
0.81
A
A
A2-Sec.
mA
mA
100
40
3
Iout = minimum, unit=ON
mA
Measured at input with specified filter
15
30
mA, pk-pk
Reflected (back) ripple current ➁
GENERAL and SAFETY
Vin=48V
Vin=36V
87
87
89
88.5
%
%
Efficiency
Isolation
Isolation Voltage, Input to Output
Isolation Voltage
Insulation Safety Rating
Isolation Resistance
Isolation Capacitance
1500
basic
Vdc
Vdc
10
MΩ
pF
1650
Yes
UL-60950-1, CSA-C22.2 No.60950-1,
IEC/60950-1, 2nd edition
Safety
Per Telcordia SR332, issue 1, class 3, ground
fixed, Tambient=+25°C
7.3
Hours x 106
Calculated MTBF ➃
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency
Startup Time
225
255
5
5
75
150
285
10
10
KHz
mS
mS
ꢀSec
mV
Power On, to Vout regulation band, 100%
Remote ON to Vout Regulated
50-75-50% load step to 1% error band
same as above
Startup Time
Dynamic Load Response
Dynamic Load Peak Deviation
FEATURES and OPTIONS
150
Remote On/Off Control ➅
"N" suffix
Negative Logic, ON state
Negative Logic, OFF state
Control Current
ON = pin grounded or external voltage
OFF = pin open or external voltage
open collector/drain
-0.7
10
1.2
15
Vdc
Vdc
mA
1
1
"P" suffix
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
15
1.2
V
V
mA
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MDC_ULT Series.F05 Page 8 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
FUNCTIONAL SPECIFICATIONS (ULT-5/5-D48-C, CONT.)
OUTPUT
Minimum
Typical/Nominal
Maximum
Units
Conditions ➀
Total Output Power
Voltage
0
25
25.25
W
Nominal Output Voltage
Setting Accuracy
Output Trim Range ➇
Overvoltage Protection
Current
Output Current Range
Minimum Load
Current Limit Inception ➈
Short Circuit
4.925
-1.5
-20
6
5
5.075
1.5
10
Vdc
% of Vo nom
% of Vout
Vdc
At 50% load
User selectable (see trim formulas)
6.6
5
7.2
0
5
A
A
98% of Vnom., after warmup
5.5
7
8.4
Hiccup technique, autorecovery within 1.25%
of Vout
Short Circuit Current
0.3
A
Short Circuit Duration (remove short for
recovery)
Short circuit protection method
Output shorted to ground, no damage
Hiccup current limiting
Continuous
Non-latching
Regulation ➆
Line Regulation
Load Regulation
Vin=min. to max., Vout=nom., full load
Iout=min. to max., Vin=nom.
Tested with eight 47ꢀF ceramic caps in parallel
At all outputs
0.1
0.125
75
% of Vout
% of Vout
mV pk-pk
% of Vout./°C
μF
% of Vout
Units
Inches
12
50
0.02
Ripple and Noise
Temperature Coefficient
Maximum Capacitive Loading
Remote Sense Compliance
MECHANICAL (Through Hole Models)
Outline Dimensions
Low ESR
400
5,000
10
Maximum
Vsense = Vout - Vload, sense connected at load
Conditions ➀ ➂
Minimum
Typical/Nominal
0.92 x 0.75 x 0.35
23.4x19.05x8.89
0.32
(Please refer to outline drawing)
Weight
LxWxH
mm
Ounces
Grams
9.07
Through Hole Pin Diameter
.04 & .062
1.02 & 1.57
Brass
Inches
mm
Through Hole Pin Material
TH Pin Plating Metal and Thickness
Nickel subplate
Gold overplate
50
3-5
ꢀ-inches
ꢀ-inches
ENVIRONMENTAL
No Derating, full power, Natural convection,
Vertical mount. See derating curves.
Vin = Zero (no power)
-40
85
°C
Operating Ambient Temperature Range ➉
Storage Temperature
-55
120
125
140
°C
°C
Thermal Protection/Shutdown
Electromagnetic Interference
Conducted, EN55022/CISPR22
RoHS rating
130
External filter is required
B
Class
RoHS-6
www.murata-ps.com/support
MDC_ULT Series.F05 Page 9 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
Performance Specification Notes
➀
All specifications are typical unless noted. Ambient temperature =
+25°Celsius, VIN is nominal, output current is maximum rated nominal.
External output capacitance consists of 400ꢀF capacitors across output
pins; one 33ꢀF low ESR, and three 1ꢀF external input capacitors. All caps
are low ESR.
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.
➆
Regulation specifications describe the deviation as the input line voltage
or output load current is varied from a nominal midpoint value to either
extreme (50% load).
➇
➈
➉
11
Do not exceed maximum power ratings, sense limits or output overvoltage
when adjusting output trim values.
Output overload protection is non-latching. When the output overload
is removed, the output will automatically recover.
All models are fully operational and meet published specifications,
including “cold start” at –40°C.
➁
➂
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 CIN = 33 ꢀF, CBUS = 220 ꢀF, LBUS = 12 ꢀH. Use
capacitor rated voltages which are twice the maximum expected voltage.
Capacitors must accept high speed AC switching currents.
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.
12
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.
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.
13
14
If reverse polarity is accidentally applied to the input, always connect an
external fast blow input fuse in series with the +VIN input.
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 ap-
plications before committing them to service. Be sure to include appropri-
ately rated FUSES (see specifications and Application Notes) to reduce the
risk of failure.
➃
➄
Mean Time Before Failure (MTBF) is calculated using the Telcordia (Bel-
core) SR-332 Method 1, Case 3, Issue 1, ground fixed conditions. Operat-
ing temperature = +25°C, full output load, natural air convection.
The output may be shorted to ground indefinitely with no damage. The
Output Short Circuit Current shown in the specifications is an average con-
sisting of very short bursts of full rated current to test whether the output
circuit can be repowered.
15
Special care should be exercised so that Input Voltage Transient does not
exceed specified Max 100V/100ms. At normal input a large transient spike
can be generated as a result of distribution inductance and high inrush
current charging input cap on converter. This can be eliminated with 33ꢀF
electrolytic capacitor mounted close to Converter input. The series resis-
tance (500mꢁ < ESR < 700mꢁ) is essential in this solution.
➅
The On/Off pin allows the converter to be turned on or off by an external
device such as a switch, a transistor, a logic gate, or an optical isolator.
If the “logic pin” is left floating the measured voltage will be outside the
limit's in the data sheet. Those numbers define the levels needed for the
“control function” to take place and do not represent the voltage that may
be present on the logic pin.
www.murata-ps.com/support
MDC_ULT Series.F05 Page 10 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
TYPICAL PERFORMANCE DATA, ULT-5/5-D48
Efficiency vs. Line Voltage and Load Current @ 25°C
Current Limit
90
88
86
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
VIN = 75V
VIN = 36V
VIN = 60V
VIN = 48V
84
VIN = 36V
VIN = 48V
VIN = 60V
VIN = 75V
82
80
78
76
74
72
70
6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7.0 7.1 7.2 7.3 7.4 7.5 7.6
Amps
0.49 1.00
1.50
2.01
2.50
3.00 3.51
4.00
4.50
5.01
Load Current (Amps)
Power Dissipation @ 25°C
3.5
3.25
3.0
2.75
2.5
2.25
2.0
1.75
1.5
1.25
1.0
VIN = 36V
VIN = 48V
VIN = 60V
VIN = 75V
0.75
0.5
0.49 1.00
1.50
2.01
2.50
3.00 3.51
4.00
4.50
5.01
Amps
Maximum Current Temperature Derating at sea level
Vin = 36-75V (air flow from Pin 3 to Pin 1 on PCB)
6
5
4
3
2
1
0.33-2.0 m/s (65–400 LFM)
0
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (°C)
www.murata-ps.com/support
MDC_ULT Series.F05 Page 11 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
TYPICAL PERFORMANCE DATA, ULT-5/5-D48
On/Off Enable Delay (Vin=48V, Vout=nom, Iout=5A, Cload=400uF, Ta=+25°C,
ScopeBW=20Mhz) Ch1=Enable, Ch4=Vout
Vin Startup Delay (Vin=48V, Vout=5V, Iout=5A, Cload=400uF, Ta=+25°C)
Ch1=Vin, Ch4=Vout
Stepload Transient Response (Vin=48V, Iout=50-75-50% of Imax,
Cload=4x100ꢀF, Ta=+25°C)
Output Ripple and Noise (Vin=48V, Iout=5A, Cload=0, 4x100ꢀF caps,
Ta=+25°C, ScopeBW=20Mhz)
Thermal image with hot spot at full load current with 25 °C ambient temperature. Natural
convection is used with no forced airflow. Identifiable and recommended maximum value
to be verified in application. Vin=48V, Q8 max Temp=96°C.
www.murata-ps.com/support
MDC_ULT Series.F05 Page 12 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
FUNCTIONAL SPECIFICATIONS (ULT-12/2.5-D48-C)
ABSOLUTE MAXIMUM RATINGS
Input Voltage, Continuous
Minimum
Typical/Nominal
Maximum
Units
Vdc
Conditions ➀
Full temperature range
36
80
Operating or non-operating, 100 mS max.
duration
15
100
Vdc
Input Voltage, Transient
Isolation Voltage
Input Reverse Polarity
On/Off Remote Control
Output Power
Output Current
Storage Temperature Range
Input to output tested
None, install external fuse
Power on or off, referred to -Vin
1500
Vdc
Vdc
Vdc
W
A
°C
none
0
0
0
15
30.3
2.5
Current-limited, no damage, short-circuit protected
Vin = Zero (no power)
-40
125
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
Conditions ➀ ➂
Operating voltage range
Recommended External Fuse
36
48
75
2
Vdc
A
Fast blow
12
Rising input voltage
Falling input voltage
Rising input voltage
32
33
34
Vdc
Start-up threshold
11
30.75
31.8
N/A
1.31
None
Capacitive
33
Vdc
Vdc
Vdc
Vdc
Undervoltage lockout (@ ½ load)
Overvoltage shutdown
Turn-On/Turn-Off Hysteresis
Reverse Polarity Protection
Internal Filter Type
1.3
1.32
None, install external fuse
Input current
Full Load Current Conditions
Low Line Input Currrent
Inrush Transient
Short Circuit Input Current.
No Load Input Currrent
Vin = nominal
Vin = minimum
Vin = 48V.
0.68
0.92
0.05
0.05
20
0.70
0.95
A
A
A2-Sec.
mA
mA
0.1
40
3
Iout = minimum, unit=ON
Shutdown Mode Input Current (Off, UV, OT)
1
mA
Measured at input with specified filter
30
mA, pk-pk
Reflected (back) ripple current ➁
GENERAL and SAFETY
Vin=48V
Vin=36V
90
89
92
91
%
%
Efficiency
Isolation
Isolation Voltage, Input to Output
Insulation Safety Rating
Isolation Resistance
Isolation Capacitance
1500
Vdc
basic
100
1600
MΩ
pF
UL-60950-1, CSA-C22.2 No.60950-1,
IEC/60950-1, 2nd edition
Safety
Yes
Per Telcordia SR332, issue 1, class 3, ground
fixed, Tambient=+25°C
TBD
Hours x 106
Calculated MTBF ➃
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency
270
300
6
330
30
KHz
mS
Power On, to Vout regulation band,
100% resistive load
Startup Time
Startup Time
Remote ON to Vout Regulated
50-75-50% load step to 1% error band
same as above
12
100
150
30
150
250
mS
ꢀSec
mV
Dynamic Load Response
Dynamic Load Peak Deviation
FEATURES and OPTIONS
Remote On/Off Control ➅
"N" suffix
Negative Logic, ON state
Negative Logic, OFF state
Control Current
ON = pin grounded or external voltage
OFF = pin open or external voltage
open collector/drain
-0.7
10
0.9
15
Vdc
Vdc
mA
1
1
"P" suffix
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
15
0.9
V
V
mA
www.murata-ps.com/support
MDC_ULT Series.F05 Page 13 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
FUNCTIONAL SPECIFICATIONS (ULT-12/2.5-D48-C, CONT.)
OUTPUT
Minimum
Typical/Nominal
Maximum
Units
Conditions ➀
Total Output Power
Voltage
0
30
30.3
W
Nominal Output Voltage
Setting Accuracy
Output Trim Range ➇
Overvoltage Protection
Current
Output Current Range
Minimum Load
Current Limit Inception ➈
Short Circuit
11.88
-1
-20
12
12.12
1
10
Vdc
% of Vo nom
% of Vout
Vdc
At 50% load
User selectable (see trim formulas)
13.3
15
2.5
18
0
2.5
4.3
A
A
no minimal load required
98% of Vnom., after warmup
2.65
3.55
Hiccup technique, autorecovery within 1.25%
of Vout
Short Circuit Current
0.4
A
Short Circuit Duration (remove short for
recovery)
Short circuit protection method
Output shorted to ground, no damage
Hiccup current limiting
Continuous
Non-latching
Regulation ➆
Line Regulation
Load Regulation
Vin=min. to max., Vout=nom., full load
Iout=min. to max., Vin=nom.
Tested with 4x47uF output caps.
At all outputs
0.075
0.125
100
% of Vout
% of Vout
mV pk-pk
% of Vout./°C
μF
% of Vout
Units
Inches
12
70
0.02
Ripple and Noise
Temperature Coefficient
Maximum Capacitive Loading
Remote Sense Compliance
MECHANICAL (Through Hole Models)
Outline Dimensions
Full resistive load, low ESR
Vsense = Vout - Vload, sense connected at load
Conditions ➀ ➂
200
2,200
10
Maximum
Minimum
Typical/Nominal
0.92 x 0.75 x 0.35
23.4x19.05x8.89
0.32
(Please refer to outline drawing)
Weight
LxWxH
mm
Ounces
Grams
9.07
Through Hole Pin Diameter
.04 & .062
1.02 & 1.57
Brass
Inches
mm
Through Hole Pin Material
TH Pin Plating Metal and Thickness
Nickel subplate
Gold overplate
50
3-5
ꢀ-inches
ꢀ-inches
ENVIRONMENTAL
Operating Ambient Temperature Range ➉
Storage Temperature
Thermal Protection/Shutdown
Electromagnetic Interference
Conducted, EN55022/CISPR22
RoHS rating
See derating curves
Vin = Zero (no power)
-40
-55
120
85
125
140
°C
°C
°C
130
External filter is required
B
Class
RoHS-6
www.murata-ps.com/support
MDC_ULT Series.F05 Page 14 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
Performance Specification Notes
➀
All specifications are typical unless noted. Ambient temperature =
+25°Celsius, VIN is nominal, output current is maximum rated nominal.
External output capacitance consists of 400ꢀF capacitors across output
pins; one 33ꢀF low ESR, and three 1ꢀF external input capacitors. All caps
are low ESR.
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.
➆
Regulation specifications describe the deviation as the input line voltage
or output load current is varied from a nominal midpoint value to either
extreme (50% load).
➇
➈
➉
11
Do not exceed maximum power ratings, sense limits or output overvoltage
when adjusting output trim values.
Output overload protection is non-latching. When the output overload
is removed, the output will automatically recover.
All models are fully operational and meet published specifications,
including “cold start” at –40°C.
➁
➂
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 CIN = 33 ꢀF, CBUS = 220 ꢀF, LBUS = 12 ꢀH. Use
capacitor rated voltages which are twice the maximum expected voltage.
Capacitors must accept high speed AC switching currents.
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.
12
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.
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.
13
14
If reverse polarity is accidentally applied to the input, always connect an
external fast blow input fuse in series with the +VIN input.
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 ap-
plications before committing them to service. Be sure to include appropri-
ately rated FUSES (see specifications and Application Notes) to reduce the
risk of failure.
➃
➄
Mean Time Before Failure (MTBF) is calculated using the Telcordia (Bel-
core) SR-332 Method 1, Case 3, Issue 1, ground fixed conditions. Operat-
ing temperature = +25°C, full output load, natural air convection.
The output may be shorted to ground indefinitely with no damage. The
Output Short Circuit Current shown in the specifications is an average con-
sisting of very short bursts of full rated current to test whether the output
circuit can be repowered.
15
Special care should be exercised so that Input Voltage Transient does not
exceed specified Max 100V/100ms. At normal input a large transient spike
can be generated as a result of distribution inductance and high inrush
current charging input cap on converter. This can be eliminated with 33ꢀF
electrolytic capacitor mounted close to Converter input. The series resis-
tance (500mꢁ < ESR < 700mꢁ) is essential in this solution.
➅
The On/Off pin allows the converter to be turned on or off by an external
device such as a switch, a transistor, a logic gate, or an optical isolator.
If the “logic pin” is left floating the measured voltage will be outside the
limit's in the data sheet. Those numbers define the levels needed for the
“control function” to take place and do not represent the voltage that may
be present on the logic pin.
www.murata-ps.com/support
MDC_ULT Series.F05 Page 15 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
TYPICAL PERFORMANCE DATA, ULT-12/2.5-D48
Efficiency vs. Line Voltage and Load Current @ 25°C
Power Dissipation @ 25°C
2.85
2.60
2.35
2.10
1.85
1.60
1.35
1.10
0.85
0.60
92
90
88
86
VIN = 36V
VIN = 48V
VIN = 60V
VIN = 75V
VIN = 36V
VIN = 48V
VIN = 60V
VIN = 72V
84
82
80
78
76
74
72
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
Amps
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
Load Current (Amps)
Maximum Current Temperature Derating at sea level
Vin = 36-48V (air flow from Pin 3 to Pin 1 on PCB)
3
2
1
0.33-2.0 m/s (65-400 LFM)
0
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (°C)
Maximum Current Temperature Derating at sea level
Vin = 60V (air flow from Pin 3 to Pin 1 on PCB)
Maximum Current Temperature Derating at sea level
Vin = 75V (air flow from Pin 3 to Pin 1 on PCB)
3
2
1
0
3
2
1
0
.033 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
.033 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0-2.0 m/s (200-400 LFM)
1.5-2.0 m/s (300-400 LFM)
30
35
40
45
50
55
60
65
70
75
80
85
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (°C)
Ambient Temperature (°C)
www.murata-ps.com/support
MDC_ULT Series.F05 Page 16 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
TYPICAL PERFORMANCE DATA, ULT-12/2.5-D48
On/Off Enable Delay Startup (Vin=48V, Vout=12V, Iout=2.5A, Cload=188uF, Ta=+25°C)
Ch1=Enable, Ch4=Vout
Vin Startup Delay (Vin=48V, Vout=12V, Iout=2.5A, Cload=188uF, Ta=+25°C)
Ch1=Vin, Ch4=Vout
Stepload Transient Response (Vin=48V, Iout=50-75-50 of Imax,
Cload=4x47uF, Ta=+25°C)
Output Ripple and Noise (Vin=48V, Iout=2.5A, Cload=4 (47 uF caps),
Ta=+25°C, ScopeBW=20Mhz)
Startup Delay (Vin=48V, Iout=2.5A, Cload=188uf, Ta=+25°C) Ch1=Vin, Ch2=Vout
Thermal image with hot spot at full load current with +25°C ambient temperature. Natural
convection is used with no forced airflow. Identifiable and recommended maximum value
to be verified in application. Vin=48V, T1 max Temp=83°C.
www.murata-ps.com/support
MDC_ULT Series.F05 Page 17 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
MECHANICAL SPECIFICATIONS,THROUGH-HOLE MOUNT
19.1
.75
Important! Always connect the sense pins. If they
are not connected to a remote load, wire each
sense pin to its respective voltage output at the
converter pins.
The 0.19-inch pin length is shown. Please refer to
the part number structure for alternate pin lengths.
Pin material: Brass.
Finish (all pins):
Gold (3-5 µ-inches min)
Over Nickel (50 µ-inches min)
23.4
.92
.010 MIN
CLEARANCE
TOP VIEW
Please note that some competitive units may use
different pin numbering or alternate outline views;
however, all units are plugin-compatible.
4.8
.19
MTG PLANE
8.9
.35
END
VIEW
1.02±0.05
.040±.002
1.52±0.05
.060±.002
@ PINS 1-3, 5-7
ISOMETRIC VIEW
@ PINS 4 & 8
1.79±0.05
.071±.002
TYP SHOULDER
FOR 40 MIL PINS
3.0
.12
13.64
.537
PIN
#1
PIN
#4
PIN
#3
3
3.81
.150
4
5
6
15.24
.600
INPUT/OUTPUT CONNECTIONS
2
1
7.62
.300
7
8
Pin
3
Function
–Vin
Pin
4
Function
–Vout
3.81
.150
5
–Sense
Trim
2
1
On/Off Control
+Vin
6
3.8
.15
.04 X 45°
CHAMFER
7
+Sense
+Vout
8
BOTTOM VIEW
Dimensions are in inches (mm) shown for ref. only.
DIMENSIONS ARE IN INCHES [mm]
Third Angle Projection
TOLERANCES:
2 PLACE .02
3 PLACE .010
ANGLES:
1
COMPONENTS SHOWN ARE FOR REFERENCE ONLY
MATERIAL:
Tolerances (unless otherwise specified):
.XX 0.02 (0.5)
.XXX 0.010 (0.25)
Angles 2ꢂ
.040 PINS: COPPER ALLOY
.060 PINS: COPPER ALLOY
FINISH: (ALL PINS)
GOLD (5μ"MIN) OVER NICKEL (50μ" MIN)
Components are shown for reference only
and may vary between units.
www.murata-ps.com/support
MDC_ULT Series.F05 Page 18 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
MECHANICAL SPECIFICATIONS, SURFACE MOUNT
Important! Always connect the sense pins. If they
are not connected to a remote load, wire each
sense pin to its respective voltage output at the
converter pins.
TOP VIEW
19.1
.75
Pin material: Brass.
Finish (all pins):
Gold (3-5 µ-inches min)
Over Nickel (50 µ-inches min)
Please note that some competitive units may use
different pin numbering or alternate outline views;
however, all units are plugin-compatible.
23.4
.92
Coplanarity spec: 0.004" [0.1mm]
END
VIEW
.010 MIN
CLEARANCE
8.9
.35
MTG PLANE
1.57±0.05
.062±.002
PINS 1-8
ALL PINS COPLANAR
ISOMETRIC VIEW
@
WITHIN .004
3.0
.12
13.64
.537
PIN
#1
3
3.81
.150
4
5
6
15.24
.600
INPUT/OUTPUT CONNECTIONS
2
1
7.62
.300
7
8
Pin
3
Function
–Vin
Pin
4
Function
–Vout
3.81
.150
5
–Sense
Trim
2
1
On/Off Control
+Vin
6
3.8
.15
7
+Sense
+Vout
BOTTOM
VIEW
8
.04 X 45°
CHAMFER
Dimensions are in inches (mm) shown for ref. only.
Third Angle Projection
DIMENSIONS ARE IN INCHES [mm]
TOLERANCES:
2 PLACE .02
3 PLACE .010
ANGLES:
1
COMPONENTS SHOWN ARE FOR REFERENCE ONLY
Tolerances (unless otherwise specified):
.XX 0.02 (0.5)
.XXX 0.010 (0.25)
Angles 2ꢂ
MATERIAL:
SMT PINS: COPPER ALLOY
FINISH: (ALL PINS)
GOLD (5μ"MIN) OVER NICKEL (50μ" MIN)
Components are shown for reference only
and may vary between units.
www.murata-ps.com/support
MDC_ULT Series.F05 Page 19 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
RECOMMENDED FOOTPRINT,THROUGH-HOLE (VIEW THROUGH CONVERTER)
TOP VIEW
FINISHED HOLE SIZES
@ PINS 1-3, 5-7
(PRI) (SEC)
(PER IP.C0-D4-287-5,.0LE6VE2L C)
FINISHED HOLE SIZES
@ PINS 4 & 8
13.64
.537
(PER IPC-D-275, LEVEL C)
.070-.084
4.19
.165
3.81
.150
1
2
3
8
7
6
5
4
7.62
.300
24.1
.95
15.24
.600
3.81
.150
3.29
.130
.100 MIN
ANNULAR RING
FOR ALL PIN
SHOULDERS
19.7
.78
IT IS RECOMMENDED THAT NO PARTS
BE PLACED BENEATH CONVERTER
RECOMMENDED FOOTPRINT, SURFACE MOUNT (VIEW THROUGH CONVERTER)
TOP VIEW
.070" [1.78mm]
MIN PAD
(8 PLACES)
(PRI) (SEC)
13.64
.537
4.19
.165
3.81
.150
1
2
3
8
7
6
5
4
7.62
.300
24.1
.95
15.24
.600
Dimensions are in inches (mm) shown for ref. only.
Third Angle Projection
3.81
.150
3.29
.130
Tolerances (unless otherwise specified):
.XX 0.02 (0.5)
.XXX 0.010 (0.25)
Angles 2ꢂ
19.7
.78
IT IS RECOMMENDED THAT NO PARTS
BE PLACED BENEATH CONVERTER
Components are shown for reference only
and may vary between units.
www.murata-ps.com/support
MDC_ULT Series.F05 Page 20 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
SHIPPING TRAYS AND BOXES,THROUGH-HOLE MOUNT
FOAM PAD
EACH STATIC DISSIPATIVE
POLYETHYLENE FOAM TRAY
ACCOMMODATES 49
CONVERTERS
69.9±6.4
2.75±.25
CLOSED HEIGHT
IN A 7 X 7 ARRAY
279.4±6.4
11.00±.25
266.7±6.4
10.50±.25
49 UNITS PER TRAY
2 TRAYS PER CARTON
MPQ=98 UNITS
www.murata-ps.com/support
MDC_ULT Series.F05 Page 21 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
TAPE AND REEL INFORMATION, SURFACE MOUNT (MSL RATING 2)
Feed (Unwind)
Direction ----
Pin #1
INDICATOR
2.00
.079
21.0
.83
4.00
.157
Round
Holes
22.00
.866
44.00
1.732
32.00
1.260
PITCH
1.6
.06
Oblong
Holes
6.0-6.3
VACUUM PICKUP
8.9
.35
Top Cover Tape
PACKAGING CONFORMS TO EIA-481
TAPE AND REEL
(200 UNITS PER REEL)
PACKAGED AS MSL2
13.0
.51
44.0
1.73
330.2
13.00
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 1ꢂ
Components are shown for reference only.
www.murata-ps.com/support
MDC_ULT Series.F05 Page 22 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
TECHNICAL NOTES
Input Fusing
circuits and layout as shown in the following two figures. External input capaci-
tors (CIN in Figure 2) serve primarily as energy-storage elements, minimiz-
ing 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.
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 Murata Power Solutions' ULT series DC/DC converters, we
recommend the use of a fast blow fuse, installed in the ungrounded input sup-
ply 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 convert-
ers must be installed in compliance with the requirements of the end- use
safety standard.
TO
CURRENT
PROBE
OSCILLOSCOPE
+VIN
–VIN
LBUS
Input Reverse-Polarity Protection
+
If the input voltage polarity is accidentally reversed, an internal diode will be-
come 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.
VIN
CBUS
CIN
–
C
IN = 33μF, ESR < 700mΩ @ 100kHz
BUS = 220μF, ESR < 100mΩ @ 100kHz
Input Under-Voltage Shutdown and Start-Up Threshold
C
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.
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 filter-
ing 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.
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 capaci-
tance, and the slew rate and final value of the input voltage as it appears at the
converter. The ULT Series implements a soft start circuit to limit the duty cycle
of its PWM controller at power up, thereby limiting the input inrush current.
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
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.
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
ULT 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.
Input Source Impedance
The input of ULT 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 induc-
tive 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 opti-
mum performance, components should be mounted close to the DC/DC converter.
Maximum
Model
Tested with
Capacitance
Loading
Four 100ꢀF output capacitors & Three 1ꢀF and
33ꢀF (low ESR) external input capacitors
Four 100ꢀF output capacitors & Three 1ꢀF and
33ꢀF (low ESR) external input capacitors
Four 47ꢀF output capacitors & three 1ꢀF and 33ꢀF
(low ESR) external input capacitors.
ULT-3.3/7.5-D48
ULT-5/5-D48
5000ꢀF
5000ꢀF
2200ꢀF
I/O Filtering, Input Ripple Current, and Output Noise
All models in the ULT Series are tested/specified for input reflected ripple cur-
rent and output noise using the specified external input/output components/
ULT-12/2.5-D48
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MDC_ULT Series.F05 Page 23 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
Short Circuit Condition
+SENSE
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 ap-
propriate 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 tem-
peratures from rising to excessive levels. The ULT Series is capable of enduring
an indefinite short circuit output condition.
+OUTPUT
C1 C2 C3 C4
RLOAD
SCOPE
–OUTPUT
–SENSE
C1–C4 = 100μF CERAMIC*
LOAD 2-3 INCHES (51-76mm) FROM MODULE
*The ULT-12/2.5-D48 model is tested with 47μF output caps.
Figure 3. Measuring Output Ripple/Noise (PARD)
Remote Sense
Thermal Shutdown
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. ULT series converters employ a sense feature to provide
point of use regulation, thereby overcoming moderate IR drops in PCB conduc-
tors 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.
The ULT converters are equipped with thermal-shutdown circuitry. If environ-
mental conditions cause the temperature of the DC/DC converter to rise above
the designed operating temperature, a precision temperature sensor inside
the PWM (see U1 in figure 4) 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.
[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 volt-
age 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 Speci-
fications 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 func-
tions 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:
Figure 4. Thermal Shutdown
Output Over-Voltage Protection
(VOUT at pins) x (IOUT) rated output power
The ULT 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 de-
crease. Following a time-out period the PWM will restart, causing the output volt-
age 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.
Contact and PCB resistance
losses due to IR drops
+VOUT
+VIN
IOUT
+SENSE
Sense Current
Current Limiting
ON/OFF
CONTROL
TRIM
–SENSE
–VOUT
LOAD
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 condi-
tion, 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.
Sense Return
IOUT Return
–VIN
Contact and PCB resistance
losses due to IR drops
Figure 5. Remote Sense Circuit Configuration
www.murata-ps.com/support
MDC_ULT Series.F05 Page 24 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
On/Off Control
The input-side, remote On/Off Control function can be ordered to operate with
either logic type.
+VIN
+Vcc
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 (-0.7 to
0.9V with respect to –Input).
13V CIRCUIT
ON/OFF
CONTROL
5V CIRCUIT
Negative (“N” suffix) logic devices are off when pin is left open (or pulled
high, applying +10V to +15V), and on when pin is pulled low (–0.7 to +0.9V)
with respect to –Input.
–VIN
Figure 6. Driving the Negative Logic On/Off Control Pin
(simplified circuit)
NOTE: Please refer to the Functional Specs for each specific ULT model.
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.
+VOUT
+SENSE
TRIM
+VIN
OUTPUT VOLTAGE ADJUSTMENT
Trim Equations
Adjustable output voltage pin. If the Trim pin is left open circuit the output
voltage is set to Vo nom. Adjustment by means of the external resistor must be
possible to achieve an output voltage of Vo nom. +10% or –20%.
ON/OFF
CONTROL
LOAD
RTRIM UP
–SENSE
–VOUT
Connecting an external resistor between the TRIM pin and the –Sense pin
decreases the output voltage set point. The following equation determines the
required external resistor value to obtain a percentage output voltage change
of Δ%:
–VIN
Figure 7. Trim Connections To Increase Output Voltages
Rtrim-down = [(511/Δ%) – 10.22] KΩ
Where:
Connect sense to its respective VOUT pin if sense is not used with a remote load.
Δ% = [(Vo set – Vdesired) / Vo set] x 100
Connecting an external resistor between the TRIM pin and the +Sense pin
increases the output voltage set point. The following equation determines the
required external resistor value to obtain a percentage output voltage change
of Δ%:
+VOUT
+VIN
+SENSE
Rtrim-up = [5.11 x Vo set x (100 +Δ%) / (1.225 x Δ%) – (511 / Δ%) – 10.22] KΩ
RTRIM DOWN
ON/OFF
CONTROL
Where:
TRIM
–SENSE
–VOUT
LOAD
Δ% = [(Vdesired – Vo set) / Vo set] x 100
To maintain set point accuracy, the trim resistor tolerance should be at least
1.0%
–VIN
Figure 8. Trim Connections To Decrease Output Voltages
www.murata-ps.com/support
MDC_ULT Series.F05 Page 25 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
Vertical Wind Tunnel
Murata Power Solutions employs a computer controlled custom-
designed closed loop vertical wind tunnel, infrared video camera sys-
tem, and test instrumentation for accurate airflow and heat dissipa-
tion 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.
IR Transparent
optical window
Variable
speed fan
Unit under
test (UUT)
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
Both through-hole and surface mount converters are soldered
down to a 10" x 10" 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 signifi-
cant 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.
Heating
element
Precision
low-rate
anemometer
3” below UUT
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.
Ambient
temperature
sensor
Airflow
collimator
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.
Figure 9. Vertical Wind Tunnel
Through-hole Soldering Guidelines
SMT Reflow Soldering Guidelines
Murata Power Solutions recommends the TH soldering specifications below when install-
ing these converters. These specifications vary depending on the solder type. Exceeding
The surface-mount reflow solder profile shown below is suitable for SAC305 type lead-
free solders. This graph should be used only as a guideline. Many other factors influence
these specifications may cause damage to the product. Your production environment may the success of SMT reflow soldering. Since your production environment may differ,
please thoroughly review these guidelines with your process engineers.
differ; therefore 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
Maximum Pot Temperature
Maximum Solder Dwell Time
For Sn/Pb based solders:
Maximum Preheat Temperature
Maximum Pot Temperature
Maximum Solder Dwell Time
115° C.
270° C.
7 seconds
105° C.
250° C.
6 seconds
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.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
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.
© 2016 Murata Power Solutions, Inc.
www.murata-ps.com/support
MDC_ULT Series.F05 Page 26 of 26
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