NXE1 Series Datasheet by Murata Power Solutions Inc.

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Murcia Power Solutions Am {23 6“ US
NXE1 Series
Isolated 1W Single Output SM DC-DC Converters
KDC_NXE1.F01 Page 1 of 8
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SELECTION GUIDE
Order Code1
Nominal Input
Voltage
Output Voltage
Input Current
Output Current
Load Regulation
(Typ)
Load Regulation
(Max)
Output Ripple
& Noise (Typ)
Output Ripple
& Noise (Max)
Efficiency (Min)
Efficiency (Typ)
Isolation
Capacitance
MTTF2
V V mA mA % % mVp-p mVp-p % % pF kHrs
NXE1S0303MC 3.3 3.3 415 303 11.5 15 55 70 63 66 3 4074
NXE1S0305MC 3.3 5 415 200 9.5 13 40 55 67 70 3 3667
NXE1S0505MC 5 5 303 200 6 8 30 45 64 67.5 3 6384
INPUT CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Voltage range Continuous operation, 3.3V input types 2.97 3.3 3.63 V
Continuous operation, 5V input types 4.5 5.0 5.5
Input reflected ripple
current All variants 7.5 15 mA p-p
ISOLATION CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Isolation voltage Production tested for 1 second 3000 VDC
Qualification tested for 1 minute 3000
Resistance Viso= 1000VDC 10 GΩ
OUTPUT CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Rated power TA=-40°C to 85°C 1.0 W
Voltage set point accuracy See tolerance envelopes
Line regulation High VIN to low VIN 1.1 1.2 %/%
GENERAL CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Switching frequency
NXE1S0303MC 75
kHzNXE1S0305MC 85
NXE1S0505MC 120
TEMPERATURE CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Specification All output types -40 85
°C
Storage -50 125
Case temperature rise above ambient All output types 22
Cooling Free air convection
ABSOLUTE MAXIMUM RATINGS
Input voltage VIN, NXE1S03 types 5.5V
Input voltage VIN, NXE1S05 types 7V
1. Components are supplied in tape and reel packaging, please refer to package specification section. Orderable part numbers are
NXE1SXXXXMC-R7 (180 pieces per reel), or NXE1SXXXXMC-R13 (800 pieces per reel).
2. Calculated using MIL-HDBK-217 FN2 calculation model with nominal input voltage at full load.
3. Please refer to short circuit application notes.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
PRODUCT OVERVIEW
The NXE1 series is a new range of low cost, lower
profile, fully automated manufacture surface
mount DC-DC converters. The NXE1 series
automated manufacturing process with substrate
Embedded Transformer, offers increased product
reliability and repeatability of performance in a
halogen free, iLGA inspectable package. The NXE1
series, industry standard footprint is compatible
with existing designs.
The NXE1 series has a MSL rating 2, and is com-
patible with a peak reflow solder temperature of
260˚C as per J-STD-020.
FEATURES
Patents pending
Lower Profile
UL60950 Recognised
ANSI/AAMI ES60601-1 Recognised
3kVDC Isolation “Hi Pot Test”
Substrate Embedded Transformer
Automated Manufacture
Industry Standard Footprint
Short Circuit Protection3
Halogen Free
Murcia Power Solutions / RoHS COMPLIANT
NXE1 Series
Isolated 1W Single Output SM DC-DC Converters
KDC_NXE1.F01 Page 2 of 8
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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 NXE1 series of DC-DC converters are all 100% production tested at 3kVDC for 1 second and have been qualification 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?”
The NXE1 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 NXE1 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 specified 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 NXE1 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 NXE1 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 NXE1 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 defined below.
Input Voltage, 3.3V: 1A
Input Voltage, 5V: 0.5A
All fuses should be UL recognised and rated to at least the maximum allowable DC input voltage.
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 NXE1 series can be soldered in accordance with J-STD-020 and have a classification temperature of 260°C and
moisture sensitivity level 2. The termination finish on this product is Gold with plating thickness 0.12 microns.
Murulo Power Solutions <1],>
NXE1 Series
Isolated 1W Single Output SM DC-DC Converters
KDC_NXE1.F01 Page 3 of 8
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APPLICATION NOTES
Short Circuit Performance
Advisory Notes Minimum Load
The NXE1 series is not hermetically sealed, customers should ensure that parts
are fully dried before input power application.
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 & 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.
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 <2% of the rated voltage of the DC-DC converter. The SRF (Self Resonant Frequency) should be >20MHz.
DC
DC
L
CLoad
Power
Source
Inductor Capacitor
L, µH SMD Through Hole C, µF
NXE1S0303MC 15 82153C 11R153C 10
NXE1S0305MC 22 82223C 11R223C 4.7
NXE1S0505MC 22 82223C 11R223C 4.7
Start-up time
µS
NXE1S0303MC 150
NXE1S0305MC 400
NXE1S0505MC 250
Typical Start-Up Wave Form
NXE1 series offers short circuit protection which is continuous with nominal input voltage at low ambient temperatures. At higher ambient temperatures of 65 °C and
above short circuit duration will be limited.
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NXE1 Series
Isolated 1W Single Output SM DC-DC Converters
KDC_NXE1.F01 Page 4 of 8
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TEMPERATURE DERATING GRAPH
150100
50
0
-40
0
0.5
1.0
1.5
Safe Operating Area
85°C
Ambient Temperature (°C)
Output Power (W)
All other output types:NXE1S0505MC1:
0
10
20
30
40
50
60
70
80
90
100
80 85 90 95 100 105 110
Load (%)
Temperature (°C)
5.5 Vin
5 Vin
4.5 Vin
1. Derating tests carried out with a product placed on a veroboard, area 1”.
CHARACTERISATION TEST METHODS
Ripple & Noise Characterisation Method
Ripple and noise measurements are performed with the following test configuration.
C1 1µF X7R m ultilayer ceramic capacitor, voltage rating to be a minimum of 3 times the output voltage of the DC-DC converter
C2 10µF tantalum capacitor, voltage rating to be a minimum of 1.5 times the output voltage of the DC-DC converter with an ESR of less
than 100m at 100 kHz
C3 100nF multilayer ceramic capacitor, general purpose
R1 450 resistor, carbon film, ±1% tolerance
R2 50 external or internal if the scope offers that facility but not both.
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
OSCILLOSCOPE
Y INPUT
SUPPLY
C1 C2 C3 R1 T1 R2
Input Output
DC/DC Converter
R LOAD
+
+
-
-
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Isolated 1W Single Output SM DC-DC Converters
KDC_NXE1.F01 Page 5 of 8
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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.
NXE1S0303MC NXE1S0305MC
NXE1S0505MC
9.2%
5.5%
Output Load Current (%)
Output Load Current (%)
Output Load Current (%)
Output Voltage
Output Voltage
Output Voltage
0.3%
-13.4%
-5.8%
-5.4%
3.9%
-1.5%
100
100
100
75
75
75
50
50
50
25
25
25
10
10
10
10%
1.5%
-3.5%
5%
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EFFICIENCY VS LOAD
NXE1S0303MC NXE1S0305MC
NXE1S0505MC
0
10
20
30
40
50
60
70
80
0 102030405060708090100
Efficiency (%)
Load (%)
0
10
20
30
40
50
60
70
80
0 102030405060708090100
Efficiency (%)
Load (%)
0
10
20
30
40
50
60
70
80
0 102030405060708090100
Efficiency (%)
Load (%)
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NXE1 Series
Isolated 1W Single Output SM DC-DC Converters
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EMC FILTERING AND SPECTRA
FILTERING
The following table shows the additional input capacitor and input inductor typically required to meet EN 55022 Curve B Quasi-Peak EMC limit, as shown in the follow-
ing plots. The following plots show positive and negative quasi peak and CISPR22 Average Limit B (purple line) and Quasi Peak Limit B (pink line) adherence limits.
Part Number Capacitor Inductor
NXE1S0303MC 4.7µF 15µH
NXE1S0305MC 4.7µF 15µH
NXE1S0505MC 3.3µF 15µH
NXE1S0303MC
NXE1S0305MC
NXE1S0505MC
0
10
20
30
40
50
60
70
80
90
100
1.00E+05 1.00E+06 1.00E+07 1.00E+08
dBuV
Frequency (Hz)
0
10
20
30
40
50
60
70
80
90
100
1.00E+05 1.00E+06 1.00E+07 1.00E+08
dBuV
Frequency (Hz)
0
10
20
30
40
50
60
70
80
90
100
1.00E+05 1.00E+06 1.00E+07 1.00E+08
dBuV
Frequency (Hz)
(7,52 103001) SMA P‘CKUP PO‘NT ' [4 3w: :5 [cube 0M] ) T .7127fl[0500]4. ”—1 Murulo Power Solutions Fin-12m SMA F‘CKUF PO‘NT (TOP or PCB] 3,11L0,19[0,122L0 007] 1 x5 PLACES REFER TO TABLE x5 PLACES 2.30 [0.091] x5 PLACES 1.00 [0 039] Elli—1L % . ij—Lzsumom J .72 54 [0100] r—ji 7 62 [0,300] , SEAT‘NG PIANE x5 Pws 1041 [0410] L x 5 PLACES n M [0 mm] 7.61 [0.300] 9.40 [0.370]
NXE1 Series
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PACKAGE SPECIFICATIONS
Mechanical Dimensions Pin Connections
Pin Function
1 -Vin
3 +Vin
7 -Vout
8 +Vout
14 NA
NA - Not available for electrical connection.
Recommended Footprint Details
All dimensions in mm (inches), Controlling dimension is mm.
Tolerances (unless otherwise stated) ±0.2 (0.008)
Components shown for reference only Weight: 1g
PAD LENGTH
Pad Length
Variant Pad Length
NXE1S0505MC 1.45 [0.057]
All other variants 1.37 [0.054]
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NXE1 Series
Isolated 1W Single Output SM DC-DC Converters
KDC_NXE1.F01 Page 9 of 8
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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. © 2018 Murata Power Solutions, Inc.
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/
TAPE & REEL SPECIFICATIONS
REEL OUTLINE DIMENSIONS REEL PACKAGING DETAILS
TAPE OUTLINE DIMENSIONS
13.3 [0.524]#
0.6 0.024
5.0 [0.197]
11.0 [0.433]#
DIRECTION OF UNREELING
1.75 [0.069]
11.5 [0.453]
24.3 [0.957] MAX
4.0 [0.157] 2.0 [0.079]
Ø1.5 +0.1
-0.0
[
Ø0.059 +0.004
-0.000
]
16.0 [0.630]
Ø1.5 [Ø0.059] MIN
22.25 [0.876] MIN
COVER TAPE
3° MAX
3° MAX
]
]
MAX
30.40 [1.197] MAX #
1.50 [0.059]
MIN ##
Ø20.20 [Ø0.795]
MIN
Ø330 [13.000] MAX
OR
Ø177.8 [7.000] MAX
Ø13.0+0.5
-0.2
[
Ø0.512+0.020
-0.008
]
100 [3.937]
MIN
LEADER SECTION
400 [15.748] MIN
GOODS
ENCLOSURE
SECTION
TRAILER SECTION
160 [6.299] MIN
Tape & Reel specifications shall conform with current EIA-481 standard
Unless otherwise stated all dimensions in mm(inches)
Controlling dimension is mm
# Measured at hub
## Six equi-spaced slots on 180mm/7” reel
Tape & Reel specifications shall conform with current EIA-481 standard
Unless otherwise stated all dimensions in mm(inches) ±0.1mm (±0.004 Inches)
Controlling dimension is mm
Components shall be orientated within the carrier tape as indicated
# Measured on a plane 0.3mm above the bottom pocket
Carrier tape pockets shown are
illustrative only - Refer to carrier tape
diagram for actual pocket details.
Reel Quantity: 7” - 180 or 13” - 800

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