NXE2 Series
www.murata-ps.com
Isolated 2W Single Output SM DC-DC Converters
SELECTION GUIDE
1
Order Code
MIL. Tel.
V V mA mA % % mVp-p mVp-p % % pF kHrs
NXE2S0505MC 5 5 542 400 9 12 55 85 68.5 72 2.1 1853 18868
FEATURES
NXE2S1205MC 12 5 220 400 11 12 50 85 74.5 77 2.1 1800 46838
NXE2S1212MC 12 12 210 167 7 8.5 25 55 74.5 76.5 2.1 1848 22472
Patents pending
NXE2S1215MC 12 15 205 133 8.5 11 30 60 76 79 2.1 1631 58568
Lower Prole
INPUT CHARACTERISTICS
UL60950 Recognised
Parameter Conditions Min. Typ. Max. Units
ANSI/AAMI ES60601-1 Recognised
Continuous operation, 5V input types 4.5 5 5.5
Voltage range V
3kVDC Isolation Hi Pot Test Continuous operation, 12V input types 10.8 12 13.2
NXE2S0505MC 4
Substrate Embedded Transformer
Input reected ripple NXE2S1205MC 2.5
mA p-p
current NXE2S1212MC 3.3
Automated Manufacture
NXE2S1215MC 2.8
Industry Standard Footprint
ISOLATION CHARACTERISTICS
3
Short Circuit Protection
Parameter Conditions Min. Typ. Max. Units
Production tested for 1 second 3000
Halogen Free
Isolation voltage VDC
Qualication tested for 1 minute 3000
Resistance Viso= 1000VDC 10 G
PRODUCT OVERVIEW
OUTPUT CHARACTERISTICS
The NXE2 series is a new range of low cost, lower Parameter Conditions Min. Typ. Max. Units
prole, fully automated manufacture surface
Rated power TA=-40C to 85C 2.0 W
mount DC-DC converters. The NXE2 series
Voltage set point accuracy See tolerance envelopes
automated manufacturing process with substrate
High VIN to low VIN, All other variants 1.15 1.2
4
Line regulation %/%
embedded transformer, offers increased product
High VIN to low VIN ,1205 variant 1.15 1.26
reliability and repeatability of performance in a
GENERAL CHARACTERISTICS
halogen free, iLGA inspectable package. The NXE2
Parameter Conditions Min. Typ. Max. Units
series, industry standard footprint is compatible
NXE2S0505MC 130
with existing designs.
NXE2S1205MC 100
Switching frequency kHz
NXE2S1212MC 115
The NXE2 series has a MSL rating 2, and is com-
NXE2S1215MC 100
patible with a peak reow solder temperature of
TEMPERATURE CHARACTERISTICS
260C as per J-STD-020.
Parameter Conditions Min. Typ. Max. Units
Specication See derating graphs -40 85
Storage -50 125
NXE2S0505MC 36
C
NXE2S1205MC 32
Case temperature rise above ambient
NXE2S1212MC 28
NXE2S1215MC 27
Cooling Free air convection
ABSOLUTE MAXIMUM RATINGS
Input voltage VIN, NXE2S05 types 7V
Input voltage VIN, NXE2S12 types 15V
1. Components are supplied in tape and reel packaging, please refer to package specication section. Orderable part numbers are
NXE2SXXXXMC-R7 (180 pieces per reel), or NXE2SXXXXMC-R13 (800 pieces per reel).
2. Calculated using MIL-HDBK-217 FN2 and Telcordia SR-332 calculation model with nominal input voltage at full load.
3. Please refer to short circuit application notes.
4. NXE2S1205MC line regulation may increase to 2.15 %/% at the operating temperature limits.
For full details go to
www.murata-ps.com/rohs
All specications typical at TA=25C, nominal input voltage and rated output current unless otherwise specied.
www.murata-ps.com All enquiries: www.murata-ps.com/support
KDC_NXE2.C01 Page 1 of 10
Nominal Input
Voltage
Output Voltage
Input Current
Output Current
Load Regulation
(Typ)
Load Regulation
(Max)
Output Ripple
& Noise (Typ)
Output Ripple
& Noise (Max)
Efciency (Min)
Efciency (Typ)
Isolation
Capacitance
2
MTTFNXE2 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 NXE2 series of DC-DC converters are all 100% production tested at 3kVDC for 1 second and have been qualication tested at 3kVDC for 1 minute.
A question commonly asked is, What is the continuous voltage that can be applied across the part in normal operation?
When the insulation in the NXE2 series is not used as a safety barrier , i.e. provides functional isolation only, continuous or switched voltages across the barrier up to 3kV are
sustainable. Long term reliability testing at these voltages continues. Peak Inception voltages measured were in excess of 3.5kV when testing for partial discharge in accordance
with IEC 60270. Please contact Murata for further information.
The NXE2 series has been recognised by Underwriters Laboratory to 125Vrms Reinforced Insulation and 250Vrms Basic insulation, please see safety approval section below.
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 NXE2 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 recognised 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 NXE2 series is recognised by Underwriters Laboratory (UL) to ANSI/AAMI ES60601-1 and provides 1 MOOP (Means Of Operator Protection) based upon a working
voltage of 250 Vrms max, between Primary and Secondary.
UL 60950
The NXE2 series has been recognised by Underwriters Laboratory (UL) to UL 60950 for reinforced insulation to a working voltage of 125Vrms and for basic insulation to a working
voltage of 250Vrms.
Creepage is 2.5mm and clearance is 2mm
FUSING
The NXE2 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
All fuses should be UL recognised, V rated.
RoHS COMPLIANCE AND MSL INFORMATION
This series is compatible with Pb-Free soldering systems and is also backward compatible with Sn/Pb soldering systems.
The NXE2 series can be soldered in accordance with J-STD-020 and have a classication temperature of 260C and
moisture sensitivity level 2. The termination nish on this product is Gold with plating thickness 0.12 microns.
www.murata-ps.com All enquiries: www.murata-ps.com/support
KDC_NXE2.C01 Page 2 of 10