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NMG Series
Isolated 2W Single Output DC/DC Converters
SELECTION GUIDE
Load Regulation (Typ) Load Regulation (Max) Efficiency (Min.) Input Current at Rated Load Efficiency (Typ.) Output Current Ripple & Noise (Typ)1 Ripple & Noise (Max)1 Nominal Input Voltage Isolation Capacitance pF
33 40 40 40 40 61 74 68
Output Voltage
Order Code
V
NMG0505SC NMG0509SC NMG0512SC NMG0515SC NMG1205SC NMG1209SC NMG1212SC NMG1215SC 5 5 5 5 12 12 12 12
V
5 9 12 15 5 9 12 15
mA
400 222 167 133 400 222 167 133
mA
470 455 450 450 200 190 190 185 5.7 4.2 3.8 3.4 4.2 2.6 2.4 2.0
%
7.3 5.9 5.1 4.5 4.9 3.1 2.9 2.4
mVp-p
28 20 18 16 22 16 13 12 35 25 25 25 35 25 25 25
%
81 84 85 85 81 83 85 85
%
83 86.5 87.5 87.5 83.5 87 88 88
kHrs
3956 3682 3299 2833 2519 2405 2235 2011
FEATURES
RoHS compliant Efficiency from 81% Wide temperature performance at full 2 Watt load, -40C to 85C UL 94V-0 package material Industry standard pinout 1kVDC isolation 5V & 12V input 5V, 9V, 12V, & 15V output Internal SMD construction Fully encapsulated with toroidal magnetics No external components required MTTF up to 3.9 million hours Pin compatible with NMR series No electrolytic or tantalum capacitors
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
Voltage range Reflected ripple current
Conditions
Continuous operation, 5V input types Continuous operation, 12V input types
Min.
4.5 10.8
Typ.
5 12 7.5
Max.
5.5 13.2 15
Units
V mA p-p
ABSOLUTE MAXIMUM RATINGS
Lead temperature 1.5mm from case for 10 seconds Internal power dissipation Input voltage VIN, NMG05 types Input voltage VIN, NMG12 types 300C 550mW 7V 15V
OUTPUT CHARACTERISTICS
Parameter
Rated Power Voltage Set Point Accuracy Line regulation
Conditions
TA=-40C to 85C See tolerance envelope High VIN to low VIN
Min.
Typ.
Max.
2
Units
W %/%
1.05
1.2
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 -40C and full 2 watt output at 85C. Pin compatibility with the NMR series ensures ease of upgradeability.
ISOLATION CHARACTERISTICS
Parameter
Isolation test voltage Resistance
Conditions
Flash tested for 1 second Viso= 1000VDC
Min.
1000 10
Typ.
Max.
Units
VDC G
GENERAL CHARACTERISTICS
Parameter
Switching frequency
Conditions
Min.
Typ.
60
Max.
Units
kHz
TEMPERATURE CHARACTERISTICS
Parameter
Specification Storage Case Temperature above ambient Cooling
Conditions
All output types NMG0505 NMG1205 All other output types Free air convection
Min.
-40 -50
Typ.
Max.
85 125 30 25 20
Units
C
For full details go to www.murata-ps.com/rohs
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=25C, nominal input voltage and rated output current unless otherwise specified.
www.murata-ps.com
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
KDC_NMGC.A03 Page 1 of 4
MTTF2
NMG Series
Isolated 2W Single Output DC/DC Converters
TEMPERATURE DERATING GRAPH 3 TOLERANCE ENVELOPE
5%
Output Voltage
Output Power (W)
2 1 0 -40
85C
Typic a
2%
l Loa d Lin e
VNOM
0%
Safe Operating Area
100 50 0 Ambient Temperature (C)
150
10
25
50
75
-4% 100
Output Load Current (%)
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?" For a part holding no specific agency approvals, such as the NMG series, 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 enameled 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 recognized 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.
RoHS COMPLIANCE INFORMATION
This series is compatible with RoHS soldering systems with a peak wave solder temperature of 300C for 10 seconds. 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
www.murata-ps.com
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
KDC_NMGC.A03 Page 2 of 4
NMG Series
Isolated 2W Single Output DC/DC Converters
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 C2 C3 R1 R2 T1 - 1F X7R multilayer ceramic capacitor rated at minimum 3 x the output voltage of the UUT - 10F 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. - 100nF multilayer ceramic capacitor, general purpose - 450 Ohm resistor, carbon film, 1% - 50 Ohm BNC termination - 3T of the coax cable through a ferrite toroid eg Ferroxcube TN32/19/13-3E25
RLOAD - Resistive load at the UUT maximum rating. Connections via twisted wires.
Differential Mode Noise Test Schematic
DC/DC Converter OSCILLOSCOPE
C1 C2 C3 +
SUPPLY Input
R1
T1
R2
Y INPUT
+
Output
-
-
R LOAD
EFFICIENCY VS LOAD NMG 5V Input Voltage
90 80 70 60 Efficiency (%) 50 40 30 20 10 0 0 10 20 30 40 50 Load (%) 60 70 80 90 100
15V 12V 9V 5V
NMG 12V Input Voltage
90 80 70 60
15V 12V 9V 5V
Efficiency (%)
50 40 30 20 10 0 0 10 20 30 40 50 Load (%) 60 70 80 90 100
www.murata-ps.com
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
KDC_NMGC.A03 Page 3 of 4
NMG Series
Isolated 2W Single Output DC/DC Converters
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS PIN CONNECTIONS - 4 PIN SIP
0.77 (19.50)
Pin
1 2 4 6
Function
+VIN -VIN -VOUT +VOUT
0.295 (7.50)
TUBE OUTLINE DIMENSIONS
0.394 (10.00) 1 0.181 (4.60) 0.141 (3.60) 0.079 (2.00)
NMG0505SC
XYYWWi
0.022 (0.55) 0.0178 (0.45)
2
4
6
0.1 (2.54) 0.22 (0.55) 0.0178 (0.45) 0.0118 (0.30) 0.0079 (0.20)
0.05 (1.25)
0.5 (12.70)
Unless otherwise stated all dimensions in inches (mm) 0.5mm. Tube length : 20.47 (520mm 2mm).
All dimensions in inches 0.01 (mm 0.25mm). All pins on a 0.1 (2.54) pitch and within 0.01 (0.25) of true position.
Weight: 2.8g
Tube Quantity : 25
RECOMMENDED FOOTPRINT DETAILS
0.045 (1.15) O 0.039 (1.00) 4 HOLES 0.00394 (0.1)
0.1 (2.54)
0.1 (2.54)
Unless otherwise stated all dimensions in inches (mm) 0.5mm.
USA: UK: France: Japan:
Tucson (Az), Tel: (800) 547 2537, email: sales@murata-ps.com Milton Keynes, Tel: +44 (0)1908 615232, email: mk@murata-ps.com Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: france@murata-ps.com Tokyo, Tel: 3-3779-1031, email: sales_tokyo@murata-ps.com Osaka, Tel: 6-6354-2025, email: sales_osaka@murata-ps.com Website: www.murata-ps.jp Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com
Canada: Toronto, Tel: (866) 740 1232, email: toronto@murata-ps.com
Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
www.murata-ps.com email: sales@murata-ps.com ISO 9001 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. (c) 2008 Murata Power Solutions, Inc.
Germany: Munchen, Tel: +49 (0)89-544334-0, email: munich@murata-ps.com
China:
www.murata-ps.com
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
KDC_NMGC.A03 Page 4 of 4

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