NXJ2 Series
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Isolated 2W Single Output SM DC-DC Converters
SELECTION GUIDE
2
MTTF
1
Order Code
V V mA mA % % mVp-p % % kHz pF kHrs
NXJ2S0505MC 5 5 550 400 7.5 10 50 110 68.5 72.5 140 2 2874 40967
FEATURES
NXJ2S1212MC 12 12 215 167 7 9 30 70 72 75 120 2 1766 65080
Patents pending
NXJ2S1215MC 12 15 215 133 8 10 25 60 75 77.5 110 2.2 1334 49049
Lower Prole
NXJ2S2405MC 24 5 110 400 8 10 70 170 73 76.5 100 2.4 2026 33111
UL60950 Recognition pending
NXJ2S2415MC 24 15 105 133 6.5 8 20 50 74.5 78.5 95 2.4 1232 44260
ANSI/AAMI ES60601-1, 2 MOOP, 1MOPP
INPUT CHARACTERISTICS
recognition pending
Parameter Conditions Min. Typ. Max. Units
5.2kVDC Isolation Hi Pot Test
Continuous operation, 5V input types 4.5 5.0 5.5
Voltage range Continuous operation, 12V input types 10.8 12 13.2 V
Substrate Embedded Transformer
Continuous operation, 24V input types 21.6 24 26.4
Automated Manufacture
Input reected ripple 5V input 15
mA p-p
3 current 12V & 24V input 5
Short Circuit Protection
Halogen Free
ISOLATION CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Production tested for 1 second 5200
Isolation voltage VDC
Qualication tested for 1 minute 5200
PRODUCT OVERVIEW
Resistance Viso= 1000VDC 10 G
The NXJ2 series is a new range of lower prole,
OUTPUT CHARACTERISTICS
fully automated manufacture surface mount
Parameter Conditions Min. Typ. Max. Units
DC-DC converters. The NXJ2 series automated
Rated power TA=-40C to 85C 2.0 W
manufacturing process with substrate Embedded
Voltage set point accuracy See tolerance envelope
Transformer, offers increased product reliability
and repeatability of performance in a halogen 24V input types 1 1.1
Line regulation High VIN to low VIN %/%
free, iLGA inspectable package. The NXJ2 series, All other input types 1.1 1.2
industry standard footprint is compatible with
TEMPERATURE CHARACTERISTICS
existing designs.
Parameter Conditions Min. Typ. Max. Units
The NXJ2 series has a MSL rating 2, and is com- Specication All output types -40 85
patible with a peak reow solder temperature of
Storage -50 125
260 C as per J-STD-020.
C
5V input types 35
Product temperature rise above ambient 12V input types 30
24V input types 25
Cooling Free air convection
ABSOLUTE MAXIMUM RATINGS
Input voltage VIN, NXJ2S05 types 7V
Input voltage VIN, NXJ2S12 types 15V
Input voltage VIN, NXJ2S24 types 28V
1. Components are supplied in tape and reel packaging, please refer to package specication section. Orderable part numbers are
NXJ2SXXXXMC-R7 (135 pieces per reel), or NXJ2SXXXXMC-R13 (600 pieces per reel).
2. Calculated using MIL-HDBK-217 FN2 and Telecordia SR-332 calculation model at TA=25C with nominal input voltage at full load.
3. Please refer to short circuit application notes.
All specications typical at TA=25C, nominal input voltage and rated output current unless otherwise specied.
For full details go to
www.murata-ps.com/rohs
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KDC_NXJ2.A02 Page 1 of 13
Nominal Input
Voltage
Output Voltage
Rated Input Current
Output Current
Load Regulation
(Typ)
Load Regulation
(Max)
Output Ripple
& Noise (Typ)
Output Ripple
& Noise (Max)
Efciency (Min)
Efciency (Typ)
Switching
Frequency (Typ)
Isolation
Capacitance
MIL 217
TelecordiaNXJ2 Series
Isolated 2W Single Output SM 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 specied time, across a component designed to provide electrical isolation, to verify the integrity of that isolation.
Murata Power Solutions NXJ2 series of DC-DC converters are all 100% production tested at 5.2kVDC for 1 second and have been qualication tested at 5.2kVDC for 1 minute.
A question commonly asked is, What is the continuous voltage that can be applied across the part in normal operation?
The NXJ2 series is pending recognition by Underwriters Laboratory, please see safety approval section for more information. When the insulation in the NXJ2 is not used as a safety
barrier, i.e. provides functional isolation only, continuous or switched voltages across the barrier in excess of 1kV are sustainable. Long term reliability testing at these voltages
continues. Please contact Murata for further information.
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 NXJ2 series has a PCB embedded isolated transformer, using FR4 as an insolation barrier between primary and secondary windings. While parts
can be expected to withstand several times the stated test voltage, the isolation capability does depend on the FR4 insulation properties. Any material, including FR4 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 should be reduced by 20% from specied test voltage.
This consideration equally applies to agency recognized parts rated for better than functional isolation where the insulation is always supplemented by a further insulation system
of physical spacing or barriers.
SAFETY APPROVAL
ANSI/AAMI ES60601-1
The NXJ2 series is pending recognition by Underwriters Laboratory (UL) to ANSI/AAMI ES60601-1 and provides 1 MOPP (Means Of Patient Protection) and 2 MOOP (Means Of
Operator Protection) based upon a working voltage of 250 Vrms max, between input and output.
UL 60950
The NXJ2 series is pending recognition by Underwriters Laboratory (UL) to UL 60950 for reinforced insulation to a working voltage of 250Vrms.
FUSING
The NXJ2 Series of converters are not internally fused so to meet the requirements of UL an anti-surge input line fuse should always be used with ratings as dened below.
Input Voltage, 5V: 1A
Input Voltage, 12V: 400mA
Input Voltage, 24V: 250mA
All fuses should be UL recognized and rated to at least the maximum allowable DC input voltage.
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KDC_NXJ2.A02 Page 2 of 13