MEE3 Series
1kVDC Isolated 3W Single Output DC/DC Converters
KDC_MEE3C.A01 Page 1 of 5
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SELECTION GUIDE
Order Code
Nominal Input
Voltage
Output
Voltage
Output Current
Input Current at
Rated Load
Load Regulation
(Typ)
Load Regulation
(Max)
Ripple & Noise
(Typ)1
Ripple & Noise
(Max)1
Efficiency (Min.)
Efficiency (Typ.)
Isolation
Capacitance
MTTF2
V V mA mA % mVp-p % % pF MHrs
MEE3S0505SC 5 5 600 703 6.3 8 46 70 80 83 32 3.9
MEE3S0509SC 5 9 333 677 5.2 6.5 28 45 84 87 50 2.9
MEE3S0512SC 5 12 250 691 4.7 6 26 45 83 86 41 4.2
MEE3S0515SC 5 15 200 679 4.7 6.5 24 45 85 88 51 2.5
MEE3S1205SC 12 5 600 290 4.3 6 41 60 82 85 42 3.6
MEE3S1209SC 12 9 333 280 3.5 5 21 40 84 88 66 3.7
MEE3S1212SC 12 12 250 280 3 4.5 19 40 84 88 77 3.4
MEE3S1215SC 12 15 200 277 2.7 4 21 40 85 89 91 3.4
INPUT CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Voltage range Continuous operation, 5V input types 4.5 5 5.5 V
Continuous operation, 12V input types 10.8 12 13.2
Reflected ripple current 5V input types 5 15 mA p-p
12V input types 5 15
OUTPUT CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Rated Power TA=-40°C to 85°C 3 W
Voltage Set Point Accuracy See tolerance envelope
Line regulation High VIN to low VIN 1.01 1.1 %/%
ISOLATION CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Isolation test voltage Flash tested for 1 second 1000 VDC
Resistance Viso= 1000VDC 10 GΩ
GENERAL CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Switching frequency 60 kHz
TEMPERATURE CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Specification All output types -40 85
°C
Storage -50 125
Case Temperature rise
above ambient
MEE3Sxx05SC, MEE3S0512C 40
MEE3S0515C, MEE3S1209C, MEE3S1212C 35
MEE3S1215C, MEE3S0509C 30
Cooling Free air convection
ABSOLUTE MAXIMUM RATINGS
Lead temperature 1mm from case for 10 seconds 260°C
Input voltage VIN, MEE3S05 types 7V
Input voltage VIN, MEE3S12 types 15V
PRODUCT OVERVIEW
The MEE3 series is a new range of high
performance 3W DC/DC converters, offering 3W
of available output power in a previously rated
2W package capable of operation over the full
industrial temperature range of -40ºC to 85ºC3.
Available in an industry standard SIP package,
with a pin compatible power upgrade path from
the 1W NME/NKE and 2W NML series’, they are
ideally suited for providing local supplies on
control system boards with the added benefit of
1kVDC galvanic isolation.
FEATURES
n UL 60950 recognized
n RoHS compliant
n Typical efficiency from 83%
n Power density 2.68W/cm3
n Wide temperature performance at full
3 Watt load, –40°C to 85°C3
n UL 94V-0 package material
n No heatsink required
n Industry standard pinout
n 5V & 12V input
n 5V, 9V, 12V, & 15V output
n Fully encapsulated with toroidal
magnetics
n No external components required
n No electrolytic or tantalum capacitors
1. See Ripple & Noise characterisation method.
2. Calculated using MIL-HDBK-217F FN2 with nominal input voltage at full load.
3. See safety approval section on page 2.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
MEE3 Series
1kVDC Isolated 3W Single Output DC/DC Converters
KDC_MEE3C.A01 Page 2 of 5
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TEMPERATURE DERATING GRAPH OUTPUT VOLTAGE TOLERANCE ENVELOPE
The voltage tolerance envelope shows typical load regulation characteristics for
this product series. The tolerance envelope is the maximum output voltage varia-
tion due to changes in output loading.
Output Load Current (%)
egatloV tuptuO
VNOM
5%
0%
-4%
2%
Typical Load Line
100
75
50
25
10
Output Load Current (%)
egatloV tuptuO
VNOM
5%
0%
-3%
1%
Typical Load Line
100
75
50
25
10
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 MEE3 series of DC/DC converters are all 100% production tested at their stated isolation voltage. This is 1kVDC for 1 second.
A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?”
The MEE3 series has been recognized by Underwriters Laboratory for functional isolation. 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 sys-
tem. 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 MEE3 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 COMPLIANT INFORMATION
This series is compatible with RoHS soldering systems with a peak wave solder temperature of
260°C for 10 seconds. The pin termination finish on the SIP package type is Tin Plate, Hot Dipped
over Matte Tin with Nickel Preplate. They are backward compatible with Sn/Pb soldering systems.
For further information, please visit www.murata-ps.com/rohs
SAFETY APPROVAL
The MEE3 series has been recognized by Underwriters Laboratory (UL) to UL 60950 for functional isolation in a maximum still air ambient temperature of 63°C and/or case tempera-
ture limit of 91°C. Case temperature measured on the face opposite the pins. File number E179522 applies.
The MEE3 series of converters are not internally fused so to meet the requirement of UL 60950, an input line fuse should always be used. An anti-surge 2.5A should be used for
MEE3S05xxSC models, and an anti-surge 1A should be used for MEE3S12xxSC models. All fuses should be UL approved and rated to at least the maximum allowable DC input
voltage.
150100
50
0
-40
0
1.5
3.0
4.5
Safe Operating Area
85°C
Ambient Temperature (°C)
Output Power (W)
MEE3 Series
1kVDC Isolated 3W Single Output DC/DC Converters
KDC_MEE3C.A01 Page 3 of 5
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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 <2% of the rated voltage of the DC/DC converter. The SRF (Self Resonant Frequency) should be
>20MHz.
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
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
L
CLoad
Power
Source
Inductor Capacitor
L, µH SMD Through Hole C, µF
MEE3S0505SC 10 84103C 11R103C 4.7
MEE3S0509SC 22 84223C 11R223C 2.2
MEE3S0512SC 47 84473C 11R473C 1
MEE3S0515SC 47 84473C 11R473C 1
MEE3S1205SC 10 84103C 11R103C 4.7
MEE3S1209SC 22 84223C 11R223C 2.2
MEE3S1212SC 47 84473C 11R473C 1
MEE3S1215SC 47 84473C 11R473C 1
OSCILLOSCOPE
Y INPUT
SUPPLY
C1 C2 C3 R1 T1 R2
Input Output
DC/DC Converter
R LOAD
+
+
-
-
MEE3 Series
1kVDC Isolated 3W Single Output DC/DC Converters
KDC_MEE3C.A01 Page 4 of 5
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EFFICIENCY VS LOAD
MEE3S05xxSC Input Voltage MEE3S12xxSC Input Voltage
0
10
20
30
40
50
60
70
80
90
100
0 10 20 30 40 50 60 70 80 90 100
Load (%)
Efficiency (%)
15V
12V
9V
5V
0
10
20
30
40
50
60
70
80
90
100
0 10 20 30 40 50 60 70 80 90 100
Load (%)
Efficiency (%)
15V
12V
9V
5V
MEE3 Series
1kVDC Isolated 3W Single Output DC/DC Converters
KDC_MEE3C.A01 Page 5 of 5
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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. © 2011 Murata Power Solutions, Inc.
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
www.murata-ps.com/locations
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS PIN CONNECTIONS - 4 PIN SIP
Pin Function
1 -VIN
2 +VIN
3 -VOUT
4 +VOUT
TUBE OUTLINE DIMENSIONS
RECOMMENDED FOOTPRINT DETAILS
14.15
(0.557) Max.
8.15
(0.321) Max.
10.15
(0.400) Max.
4.1±0.5
(0.16±0.020)
0.25 (0.100)
0.4 (0.016)
Min.
3.16 (0.124)
3.87 (0.152)
7.62
(0.300)
1.00-1.45
(0.039-0.057)
0.55 (0.022)
0.45 (0.018)
1234
XYYWWi
MEE3S0505SC
All dimensions in mm ±0.1mm (inches ±0.004). All pins on a 2.54 (0.1) pitch
and within ± 0.25 (0.01) of true position. Weight: 2.3 g
SIP Package
2.54
(0.1)
2.54
(0.1)
1.15 (0.0453)
1.00 (0.0394)
Ø
0.1 (0.00394)
4 HOLES
Tube Quantity: 35
Unless otherwise stated all dimensions in mm (inches) ±0.5mm.
17.00 (0.669)
11.43 (0.45)
4.00
(0.157)
9.05 (0.356)
0.50±0.15
(0.197±0.006)
Unless otherwise stated all dimensions in mm (inches) ±0.5mm.
Tube length: 520mm ±2mm (20.47).
