NMG Series
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Isolated 2W Single Output DC-DC Converters
5
5
5
5
12
12
12
12
15
24
24
24
5
12
15
24
5
9
12
24
15
5
12
15
400
167
133
83
400
222
167
83
133
400
167
133
470
450
450
465
200
190
190
190
150
100
95
95
5.7
3.8
3.4
4.3
4.2
2.6
2.4
2.6
2.3
4.1
2.1
2
7.3
5.1
4.5
6
4.9
3.1
2.9
4
3.5
6
3.5
3.5
28
18
16
35
22
16
13
25
25
40
25
30
NMG0509SC
NMG1215SC
NMG1505SC
NMG2409SC
5
12
15
24
9
15
5
9
222
133
400
222
455
185
160
95
4.2
2.0
4.3
2.6
5.9
2.4
6
4
NMG1509SC
NMG1512SC
15
15
9
12
222
167
155
150
2.9
2.4
4.5
3.5
%
pF
kHrs
35
25
25
60
35
25
25
40
40
70
50
50
81
84
84
82
81
83
85
84
84
80
84
85
83
87.5
87.5
85
83.5
87
88
86.5
88
84
88
88.5
33
40
40
35
40
61
74
60
75
45
75
85
3956
3299
2833
2189
2519
2405
2235
2189
2483
3659
3824
3500
20
12
40
30
25
25
60
50
84
85
80
84
86.5
88
83
87.5
40
68
40
55
3682
2011
3963
2496
25
25
40
40
82
84
86.5
87.5
55
65
3176 Contact Murata
2875 Contact Murata
mVp-p
Recommended
Alternative
%
Ripple & Noise (Typ)1
MTTF2
NMG0505SC
NMG0512SC
NMG0515SC
NMG0524SC
NMG1205SC
NMG1209SC
NMG1212SC
NMG1224SC
NMG1515SC
NMG2405SC
NMG2412SC
NMG2415SC
%
Isolation Capacitance
mA
Efficiency (Typ.)
Input Current at Rated
Load
mA
Efficiency (Min.)
Output Current
V
Ripple & Noise (Max)1
Output Voltage
V
Order Code
Load Regulation (Typ)
Nominal Input Voltage
Load Regulation (Max)
SELECTION GUIDE
FEATURES
UL 60950 recognised
Efficiency from 80%
Wide temperature performance at full
2 watt load, –40°C to 85°C
Industry standard pinout
1kVDC isolation ‘Hi Pot Test’
5V, 12V, 15V & 24V inputs
5V, 9V, 12V & 15V outputs
Internal SMD construction
No external components required
MTTF up to 3.9 million hours
Pin compatible with CMR, CRR1, NMR &
MER1 series
MEJ2S0509SC
MEJ2S1215SC
MEJ2S1505SC
NMK2409SAC
No electrolytic or tantalum capacitors
PRODUCT OVERVIEW
The NMG series of DC-DC Converters is
particularly suited to isolating and/or converting
DC power rails. The galvanic isolation allows the
device to be configured to provide an isolated
negative rail in systems where only positive rails
exist. The wide temperature range guarantees
startup from –40°C and full 2 watt output at
85°C.
When operated with additional external load capacitance the rise time of the input voltage will determine the maximum external
capacitance value for guaranteed start up. The slower the rise time of the input voltage the greater the maximum value of the
additional external capacitance for reliable start up.
INPUT CHARACTERISTICS
Parameter
Conditions
Min.
Typ.
Max.
Voltage range
Continuous operation, 5V input types
Continuous operation, 12V input types
Continuous operation, 15V input types
Continuous operation, 24V input types
4.5
10.8
13.5
21.6
5
12
15
24
7.5
5.5
13.2
16.5
26.4
15
mA p-p
Typ.
Max.
Units
2
W
Reflected ripple current
Units
V
OUTPUT CHARACTERISTICS
Parameter
Rated Power
For full details go to
https://www.murata.com/englobal/products/power/rohs
Conditions
TA=-40°C to 85°C
Min.
1. See Ripple & Noise characterisation method.
2. Calculated using MIL-HDBK-217F FN2 with nominal input voltage at full load.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
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KDC_NMG.K01 Page 1 of 9
NMG Series
Isolated 2W Single Output DC-DC Converters
ISOLATION CHARACTERISTICS
Parameter
Conditions
Min.
Isolation test voltage
Resistance
Flash tested for 1 second
Viso= 1000VDC
1000
10
Typ.
Max.
Units
VDC
GΩ
GENERAL CHARACTERISTICS
Parameter
Conditions
Switching frequency
24V output types
All other types
Min.
Typ.
Max.
Units
70
60
kHz
TEMPERATURE CHARACTERISTICS
Parameter
Conditions
Min.
Specification
Storage
All output types
-40
-50
Case Temperature above
ambient
Cooling
5V input types and 5V output types
All other types
Free air convection
Typ.
Max.
Units
85
125
30
25
°C
ABSOLUTE MAXIMUM RATINGS
Lead temperature 1.5mm from case for 10 seconds
260°C
Wave Solder
Wave Solder profile not to exceed the profile recommended in IEC 61760-1 Section 6.1.3. Please
refer to application notes for further information.
Input voltage VIN, NMG05 types
Input voltage VIN, NMG12 types
Input voltage VIN, NMG15 types
Input voltage VIN, NMG24 types
7V
15V
18V
28V
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KDC_NMG.K01 Page 2 of 9
NMG Series
Isolated 2W Single Output DC-DC Converters
TECHNICAL NOTES
ISOLATION VOLTAGE
‘Hi Pot Test’, ‘Flash Tested’, ‘Withstand Voltage’, ‘Proof Voltage’, ‘Dielectric Withstand Voltage’ & ‘Isolation Test Voltage’ are all terms that relate to the same thing, a test voltage,
applied for a specified time, across a component designed to provide electrical isolation, to verify the integrity of that isolation.
Murata Power Solutions NMG series of DC-DC converters are all 100% production tested at their stated isolation voltage. This is 1kVDC for 1 minute.
A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?”
The NMG series has been recognised by Underwriters Laboratory for functional insulation. Both input and output should normally be maintained within SELV limits i.e. less than
42.4V peak, or 60VDC. The isolation test voltage represents a measure of immunity to transient voltages and the part should never be used as an element of a safety isolation
system. The part could be expected to function correctly with several hundred volts offset applied continuously across the isolation barrier; but then the circuitry on both sides
of the barrier must be regarded as operating at an unsafe voltage and further isolation/insulation systems must form a barrier between these circuits and any user-accessible
circuitry according to safety standard requirements.
REPEATED HIGH-VOLTAGE ISOLATION TESTING
It is well known that repeated high-voltage isolation testing of a barrier component can actually degrade isolation capability, to a lesser or greater degree depending on materials, construction and environment. The NMG series has toroidal isolation transformers, with no additional insulation between primary and secondary windings of enamelled wire.
While parts can be expected to withstand several times the stated test voltage, the isolation capability does depend on the wire insulation. Any material, including this enamel
(typically polyurethane) is susceptible to eventual chemical degradation when subject to very high applied voltages thus implying that the number of tests should be strictly limited. We therefore strongly advise against repeated high voltage isolation testing, but if it is absolutely required, that the voltage be reduced by 20% from specified test voltage.
This consideration equally applies to agency recognised parts rated for better than functional isolation where the wire enamel insulation is always supplemented by a further
insulation system of physical spacing or barriers.
SAFETY APPROVAL
The NMG series has been recognised by Underwriters Laboratory (UL) to UL 60950 for functional insulation in a maximum ambient temperature of 85ºC and/or case temperature
limit of 130ºC. Case temperature measured on the face opposite the pins. File number E151252 applies.
The NMG Series of converters are not internally fused so to meet the requirements of UL 60950 an input line fuse should always be used. An anti-surge 2A should be used for
NMG05xxSC models, and an anti-surge 0.75A should be used for NMG12xxSC models. All fuses should be UL approved and rated to at least the maximum allowable DC input
voltage.
RoHS COMPLIANCE INFORMATION
This series is compatible with RoHS soldering systems with a peak wave solder temperature of
260°C for 10 seconds. Please refer to application notes for further information. The pin termination
finish is Tin Plate, Hot Dipped over Matte Tin with Nickel Preplate. This series are backward
compatible with Sn/Pb soldering systems. For further information, please visit www.murata-ps.com/
rohs
PART NUMBER STRUCTURE
NMG XX XX S C
Series name
RoHS compliant
Input voltage
Package type
Output voltage
S - SIP
D - DIP
M - Surface mount
Z - ZIP
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KDC_NMG.K01 Page 3 of 9
NMG Series
Isolated 2W Single Output DC-DC Converters
CHARACTERISATION TEST METHODS
Ripple & Noise Characterisation Method
All measurement to be taken with the following components connected to the UUT as detailed below. 50 Ohm coax cable, solder connections one end, BNC plug
at the other end.
C1
1μF X7R multilayer ceramic capacitor, voltage rating to be a minimum of 3 times the output voltage of the DC-DC converter
C2
10μF tantalum capacitor rated at minimum 1.5 x the output voltage of the UUT with ESR of less than 100 milliohms at 100 kHz e.g. AVX TPS
series.
C3
100nF multilayer ceramic capacitor, general purpose
R1
450Ω resistor, carbon film, ±1% tolerance
R2
50Ω BNC termination
T1
3T of the coax cable through a ferrite toroid
RLOAD
Resistive load to the maximum power rating of the DC-DC converter. Connections should be made via twisted wires
Measured values are multiplied by 10 to obtain the specified values.
Differential Mode Noise Test Schematic
DC/DC Converter
OSCILLOSCOPE
C1 C2 C3
+
SUPPLY
Input
-
R1
T1
+
R2
Y INPUT
Output
-
R LOAD
APPLICATION NOTES
Minimum load
The minimum load to meet datasheet specification is 10% of the full rated load across the specified input voltage range. Lower than 10% minimum loading will result
in an increase in output voltage, which may rise to typically double the specified output voltage if the output load falls to less than 5%.
Capacitive loading and start up
Typical start up times for this series, with a typical input voltage rise time of 2.2μs and output capacitance of 10μF, are shown in the table below. The product
series will start into a capacitance of 47μF with an increased start time, however, the maximum recommended output capacitance is 10μF.
NMG0505SC
NMG0509SC
NMG0512SC
NMG0515SC
NMG1205SC
NMG1209SC
NMG1212SC
NMG1215SC
Start-up time
μs
444
1120
1930
3470
409
1320
1320
2270
NMG0524SC
2200
NMG1224SC
1400
NMG1505SC
NMG1509SC
NMG1512SC
NMG1515SC
NMG2405SC
NMG2409SC
NMG2412SC
NMG2415SC
Start-up time
μs
100
170
300
450
80
130
220
330
Typical Start-Up Wave Form
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KDC_NMG.K01 Page 4 of 9
NMG Series
Isolated 2W Single Output DC-DC Converters
APPLICATION NOTES (Continued)
Output Ripple Reduction
By using the values of inductance and capacitance stated, the output ripple at the rated load is lowered to 5mV p-p max.
Component selection
Capacitor: It is required that the ESR (Equivalent Series Resistance) should be as low as possible, ceramic types are recommended.
The voltage rating should be at least twice (except for 15V output), the rated output voltage of the DC-DC converter.
Inductor: The rated current of the inductor should not be less than that of the output of the DC-DC converter. At the rated current, the DC resistance of the
inductor should be such that the voltage drop across the inductor is 20MHz.
L
Power
Source
NMG0505SC
NMG0509SC
NMG0512SC
NMG0515SC
NMG0524SC
NMG1205SC
NMG1209SC
NMG1212SC
NMG1215SC
NMG1224SC
NMG1505SC
NMG1509SC
NMG1512SC
NMG1515SC
NMG2405SC
NMG2409SC
NMG2412SC
NMG2415SC
L, μH
4.7
10
22
47
47
4.7
10
22
47
47
4.7
10
22
47
4.7
10
22
47
Inductor
SMD
82472C
82103C
82223C
82473C
82473C
82472C
82103C
82223C
82473C
82473C
82472C
82103C
82223C
82473C
82472C
82103C
82223C
82473C
DC
C
Load
DC
Through Hole
11R472C
11R103C
11R223C
11R473C
11R473C
11R472C
11R103C
11R223C
11R473C
11R473C
11R472C
11R103C
11R223C
11R473C
11R472C
11R103C
11R223C
11R473C
Capacitor
C, μF
10
4.7
2.2
1
1
10
4.7
2.2
1
1
10
4.7
2.2
1
10
4.7
2.2
1
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KDC_NMG.K01 Page 5 of 9
NMG Series
Isolated 2W Single Output DC-DC Converters
TOLERANCE ENVELOPES
The voltage tolerance envelopes show typical load regulation characteristics for this product series. The tolerance envelope is the maximum output voltage variation due
to changes in output loading and set point accuracy.
1224, 1515, 2412, 2415
2405
3%
2%
0%
-3%
10
25
50
75
Output Load Current (%)
Output Voltage
Output Voltage
6%
2%
0%
-3%
10
100
25
50
75
Output Load Current (%)
100
05XX,, 1205, 1209, 1212, 1215, 1505, 1509, 1512, 2409
Output Voltage
5%
2%
0%
-4%
10
25
50
75
Output Load Current (%)
100
TEMPERATURE DERATING GRAPH
Output Power (W)
3
2
1
0
-40
85°C
Safe Operating Area
100
50
0
Ambient Temperature (°C)
150
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KDC_NMG.K01 Page 6 of 9
NMG Series
Isolated 2W Single Output DC-DC Converters
EFFICIENCY VS LOAD
5V Input
12V Input
90
90
80
80
70
70
NMG0512SC
NMG0505SC
NMG0509SC
NMG0515SC
NMG0524SC
50
NMG1205SC
60
NMG1209SC
Efficiency (%)
Efficiency (%)
60
40
NMG1215SC
NMG1224SC
40
30
30
20
20
10
10
0
NMG1212SC
50
0
0
10
20
30
40
50
60
70
80
90
100
0
10
20
30
40
Load (%)
15V Input
60
70
80
90
100
24V Input
90
90
80
80
70
70
NMG1505SC
60
NMG1512SC
NMG1515SC
40
NMG2409SC
NMG2412SC
NMG1509SC
50
NMG2405SC
60
Efficiency (%)
Efficiency (%)
50
Load (%)
50
NMG2415SC
40
30
30
20
20
10
10
0
0
0
10
20
30
40
50
Load (%)
60
70
80
90
100
0
10
20
30
40
50
60
70
80
90
100
Load (%)
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KDC_NMG.K01 Page 7 of 9
NMG Series
Isolated 2W Single Output DC-DC Converters
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
PIN CONNECTIONS - 4 PIN SIP
19.65 [0.774] MAX
0.40 [0.0016] MIN
7.65 [0.301] MAX
NMG0505SC
10.15 [0.400] MAX
XYYWW
Pin
Function
1
+VIN
2
-VIN
4
-VOUT
6
+VOUT
TUBE OUTLINE DIMENSIONS
9.3 [0.366]
4.10±0.50 [0.161±0.020]
1 2
4
6
2.54 [0.100]
0.50±0.05 [0.020±0.002]
12.43 [0.489]
5.08 [0.200]
18.0 [0.709]
0.25±0.05 [0.010±0.002]
]
]
1.45 0.057
1.00 0.039
2.52 0.099
1.54 0.061
]
]
12.70 [0.500]
5.0 [0.197]
Unless otherwise stated all dimensions in mm (inches)
Controlling dimension is mm.
All pins on a 2.54mm (0.100”) pitch and within 0.25mm (0.010”) of true position.
Weight: 2.8g
Unless otherwise specified all dimensions in mm [inches] ±0.55mm [0.022].
Tube Length : 520mm [20.472] ±2.0 [0.079].
Tube Quantity : 25
RECOMMENDED FOOTPRINT DETAILS
1.15
1.00
]
X 4 HOLES Ø
Ø
0.045
0.039
]
2.54 [0.100]
2.54 [0.100]
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KDC_NMG.K01 Page 8 of 9
NMG Series
Isolated 2W Single Output DC-DC Converters
DISCLAIMER
Unless otherwise stated in the datasheet, all products are designed for standard commercial and industrial applications and NOT for safety-critical and/or life-critical
applications.
Particularly for safety-critical and/or life-critical applications, i.e. applications that may directly endanger or cause the loss of life, inflict bodily harm and/or loss or severe
damage to equipment/property, and severely harm the environment, a prior explicit written approval from Murata is strictly required. Any use of Murata standard products for any safety-critical, life-critical or any related applications without any prior explicit written approval from Murata shall be deemed unauthorised use.
These applications include but are not limited to:
•
Aircraft equipment
•
Aerospace equipment
•
Undersea equipment
•
Power plant control equipment
•
Medical equipment
•
Transportation equipment ( automobiles, trains, ships, etc.)
•
Traffic signal equipment
•
Disaster prevention / crime prevention equipment
•
Data Processing equipment
Murata makes no express or implied warranty, representation, or guarantee of suitability, fitness for any particular use/purpose and/or compatibility with any application or device of the buyer, nor does Murata assume any liability whatsoever arising out of unauthorised use of any Murata product for the application of the buyer. The
suitability, fitness for any particular use/purpose and/or compatibility of Murata product with any application or device of the buyer remain to be the responsibility and
liability of the buyer.
Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards that anticipate dangerous consequences of failures, monitor failures and their consequences, lessen the likelihood of failures that might cause harm, and take appropriate remedial actions. Buyer will fully indemnify and hold
Murata, its affiliated companies, and its representatives harmless against any damages arising out of unauthorised use of any Murata products in any safety-critical and/
or life-critical applications.
Remark: Murata in this section refers to Murata Manufacturing Company and its affiliated companies worldwide including, but not limited to, Murata Power Solutions.
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: https://www.murata.com/en-eu/products/power/requirements
Murata Power Solutions (Milton Keynes) Ltd. 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.
© 2022 Murata Power Solutions (Milton Keynes) Ltd.
www.murata.com
KDC_NMG.K01 Page 9 of 9
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