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MEJ2 Series
www.murata-ps.com
5.2kVDC Isolated 2W DC/DC Converters
FEATURES
„
RoHS compliant
„
Basic/supplementary isolation to UL 609502
„
ANSI/AAMI ES60601-1
„
Power density 0.81W/cm3
„
Single and dual outputs
„
UL 94V-0 package material
„
Footprint 1.96cm2
„
SIP package style
„
5.2kVDC isolation ‘Hi Pot Test’
„
3.3V, 5V, 12V & 15V inputs
„
3.3V, 5V, 9V, 12V & 15V output
„
Internal SMD construction
„
Fully encapsulated with toroidal magnetics
„
Pin compatible with the MEV, NMV, NMK, &
NMJ series
„
MTTF up to 4.2 million hours
PRODUCT OVERVIEW
The MEJ2 series are single and dual output
medically approved DC/DC converters in a 7 pin SIP
package style offering a power upgrade path from
the NMJ series SIP DC/DC converters. The MEJ2
series is UL 60950 and ANSI/AAMI ES60601-1
recognized, which makes it ideal for applications
where safety and miniaturisation are of paramount
importance.
MEJ2S0303SC
MEJ2S0305SC
MEJ2S0503SC
MEJ2S0505SC
MEJ2S0509SC
MEJ2S0512SC
MEJ2S0515SC
MEJ2S1203SC
MEJ2S1205SC
MEJ2S1209SC
MEJ2S1212SC
MEJ2S1215SC
MEJ2S1505SC
MEJ2S1509SC
MEJ2S1512SC
MEJ2S1515SC
MEJ2D0503SC
MEJ2D0505SC
MEJ2D0509SC
MEJ2D0512SC
MEJ2D0515SC
MEJ2D1203SC
MEJ2D1205SC
MEJ2D1209SC
MEJ2D1212SC
MEJ2D1215SC
MEJ2D1505SC
MEJ2D1509SC
MEJ2D1512SC
MEJ2D1515SC
mA
606
756
400
784
606
528
400
503
222
505
167
495
133
488
606
207
400
214
222
205
167
207
133
205
400
171
222
165
167
164
133
166
±303 535
±200 508
±111 510
±83
504
±67
492
±303 205
±200 212
±111 206
±83
208
±67
203
±200 170
±111 163
±83
167
±67
167
%
14.0
13.0
10.0
8.5
8.0
8.0
7.0
9.5
8.0
7.0
6.5
7.0
8.5
6.5
6.5
7.0
8.5
7.5
6.5
5.0
6.5
8.0
7.0
5.5
5.5
6.0
7.0
5.5
5.5
5.5
17
15
15
10
11
12
10
11
10
10
8
10
10
8
8
8
10
9
8
8
7
9
8
7
7
7
9
7
7
7
mVp-p
38
55
50
65
40
55
43
55
36
50
40
55
34
45
43
60
43
60
35
50
35
50
32
45
44
60
35
50
38
55
36
50
26
40
34
50
27
40
27
40
20
35
37
55
32
45
27
40
27
40
24
40
37
50
26
40
26
40
23
35
%
67
70
67
72
75
74
76
70
75
75
76
76
73
74
74
74
67
72
76
77
76
72
75
77
77
78
74
76
75
75
70
74
70
75
78
77
79
73
78
79
80
80
76
78
79
78
71
76
79
80
79
75
79
81
81
82
78
80
80
79
MTTF2
Efficiency
(Typ)
Efficiency
(Min)
Ripple & Noise
(Max)3
Ripple & Noise
(Typ)3
Load Regulation
(Max)
Load Regulation
(Typ)
V
3.3
5
3.3
5
9
12
15
3.3
5
9
12
15
5
9
12
15
±3.3
±5
±9
±12
±15
±3.3
±5
±9
±12
±15
±5
±9
±12
±15
Input Current
at Rated Load
V
3.3
3.3
5
5
5
5
5
12
12
12
12
12
15
15
15
15
5
5
5
5
5
12
12
12
12
12
15
15
15
15
Output Current
Output Voltage
Order Code
Nominal Input
Voltage
SELECTION GUIDE
kHrs
3910
3757
3830
3654
3472
3663
2629
3259
3200
2453
2779
2707
2638
2203
2330
2100
3969
3654
3472
3663
2629
3270
3268
2453
2779
2707
2638
2203
2330
2100
INPUT CHARACTERISTICS
Parameter
Voltage range
Input reflected ripple
Conditions
Min.
Typ.
Max.
Continuous operation, 3V input types
Continuous operation, 5V input types
Continuous operation, 12V input types
Continuous operation, 15V input types
3.3V input types
5V input types
12V & 15V input types
2.97
4.5
10.8
13.5
3.3
5
12
15
100
60
22
3.63
5.5
13.2
16.5
140
90
40
Units
V
mA
1. Calculated using MIL-HDBK-217 FN2 calculation model with nominal input voltage at full load.
2. See safety approvals section for limitations of use.
3. See ripple & noise test method.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
For full details go to
www.murata-ps.com/rohs
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KDC_MEJ2_E01 Page 1 of 7
MEJ2 Series
5.2kVDC Isolated 2W DC/DC Converters
OUTPUT CHARACTERISTICS
Parameter
Conditions
Rated Power2
Voltage Set Point Accuracy
Line regulation
TA=-40ºC to 85ºC
See tolerance envelopes
High VIN to low VIN
Min.
Typ.
Max.
Units
2
W
1.0
1.2
%/%
Typ.
Max.
Units
ABSOLUTE MAXIMUM RATINGS
Short-circuit protection
Lead temperature 1mm from case for 10 seconds
Input voltage VIN, MEJ2x03xxSC
Input voltage VIN, MEJ2x05xxSC
Input voltage VIN, MEJ2x12xxSC
Input voltage VIN, MEJ2x15xxSC
10 minutes
260°C
5V
7V
15V
18V
ISOLATION CHARACTERISTICS
Parameter
Conditions
Min.
Isolation test voltage
Resistance
Isolation capacitance
Flash tested for 1 second
Viso= 500VDC
5200
Parameter
Conditions
Min.
Switching frequency
All types
VDC
GΩ
pF
1
4
GENERAL CHARACTERISTICS
Typ.
Max.
45
Units
kHz
TEMPERATURE CHARACTERISTICS
Parameter
Conditions
Min.
Specification
Storage
All output types (see safety approval section for limitations)
-40
-55
Case Temperature above ambient
Cooling
Typ.
Max.
Units
85
125
MEJ2S0509SC, MEJ2S0512SC, MEJ2S0515SC, MEJ2S1209SC, MEJ2x1212SC,
MEJ2S1215SC, MEJ2S1509SC, MEJ2S1512SC, MEJ2S1515SC
27
MEJ2S0503SC, MEJ2S0505SC, MEJ2S1203SC, MEJ2S1205SC, MEJ2x1505SC,
MEJ2S1515SC, MEJ2D0512SC, MEJ2D0515SC, MEJ2D1209SC, MEJ2D1215SC
30
MEJ2S0305SC, MEJ2S0303SC, MEJ2S1203SC, MEJ2D0505SC, MEJ2D0509SC,
MEJ2D1205SC, MEJ2D1509SC, MEJ2D1512SC
33
°C
37
MEJ2D01203SC, MEJ2D0503SC
Free air convection
Output Power (W)
TEMPERATURE DERATING GRAPH
2.0
1.0
0.2
-40
Safe
Operating Area
85
0
40
Ambient Temperature (ºC)
UL60950 recognition to a maximum ambient temperature of 85ºC and/or case temperature limit of 155ºC, measured on the face opposite the pins.
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KDC_MEJ2_E01 Page 2 of 7
MEJ2 Series
5.2kVDC Isolated 2W DC/DC Converters
TOLERANCE ENVELOPE
3.3V in, 3.3V output types
All other output types
+10%
+9%
-7%
-17%
10
75
50
25
Output Load Current (%)
100
VNOM
Output Voltage
Output Voltage
+2.5%
+1%
VNOM
-7.5%
10
75
50
25
Output Load Current (%)
100
The voltage tolerance envelope shows typical load regulation characteristics for this product series. The tolerance envelope is the maximum output voltage variation due to
changes in output loading.
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 MEJ2 series of DC/DC converters are all 100% production tested at their stated isolation voltage. This is 5.2kVDC for 1 second.
A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?”
The MEJ2 series has been recognized by Underwiters Laboratory for various voltages, 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. 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.
SAFETY APPROVAL
ANSI/AAMI ES60601-1
The MEJ1 series has been tested by Underwriters Laboratory (UL) to meet ANSI/AAMI ES60601-1 medical safety standard providing the following MOOP (means of operator
protection), in a maximum ambient temperature of 85°C and/or case temperature limit of 155°C (case temperature measured on the face opposite the pins): 1 MOOP based upon
a working voltage of 200 Vrms max and 280 Vpk max., between Primary and Secondary and between Primary and its Enclosure. File Number E202895 applies.
UL 60950
The MEJ2 series has been recognized by Underwriters Laboratory (UL) to UL 60950 for basic/supplementary insulation to a working voltage of 300Vrms in a maximum ambient
temperature of 85°C and/or case temperature limit of 130°C (case temperature measured on the face opposite the pins). File number E151252 applies.
FUSING
The MEJ2 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.
MEJ2x03xxxC: 2A
MEJ2x05xxxC: 2A
MEJ2x12xxxC: 750mA
MEJ2x15xxxC: 750mA
All fuses should be UL recognized and rated to at least the maximum allowable DC input voltage.
RoHS COMPLIANCE INFORMATION
This series is compatible with RoHS soldering systems with a peak wave solder temperature of 260ºC for 10 seconds. The pin termination finish
on this product series is Tin Plate, Hot Dipped over Matte Tin with Nickel Preplate. The series is backward compatible with Sn/Pb soldering
systems. For further information, please visit www.murata-ps.com/rohs
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KDC_MEJ2_E01 Page 3 of 7
MEJ2 Series
5.2kVDC Isolated 2W DC/DC Converters
APPLICATION NOTES
Minimum load
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 and 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.
MEJ2S0303SC
MEJ2S0305SC
MEJ2S0503SC
MEJ2S0505SC
MEJ2S0509SC
MEJ2S0512SC
MEJ2S0515SC
MEJ2S1203SC
MEJ2S1205SC
MEJ2S1209SC
MEJ2S1212SC
MEJ2S1215SC
MEJ2S1505SC
MEJ2S1509SC
MEJ2S1512SC
Start-up time
ms
0.89
1.89
1.08
2.04
6.5
8.29
11.4
0.73
1.61
4.04
5.51
7.61
1.33
3.37
4.47
MEJ2S1515SC
MEJ2D0503SC
MEJ2D0505SC
MEJ2D0509SC
MEJ2D0512SC
MEJ2D0515SC
MEJ2D1203SC
MEJ2D1205SC
MEJ2D1209SC
MEJ2D1212SC
MEJ2D1215SC
MEJ2D1505SC
MEJ2D1509SC
MEJ2D1512SC
MEJ2D1515SC
Typical Start-Up Wave Form
Start-up time
ms
6.05
1.57
1.79
9.32
14.9
20.84
1.03
2.51
6.46
9.94
14.54
1.79
5.16
7.04
10.48
Ripple & Noise Characterisation Method
Ripple and noise measurements are performed with the following test configuration.
C1
1μF X7R multilayer ceramic capacitor, voltage rating to be a minimum of 3 times the output voltage of the DC/DC converter
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 100mΩ at 100 kHz
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.
C2
Differential Mode Noise Test Schematic
DC/DC Converter
OSCILLOSCOPE
C1 C2 C3
+
SUPPLY
Input
-
+
R1
T1
R2
Y INPUT
Output
-
R LOAD
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KDC_MEJ2_E01 Page 4 of 7
MEJ2 Series
5.2kVDC Isolated 2W DC/DC Converters
EFFICIENCY VS LOAD
90
80
80
70
70
Efficiency (%)
MEJ2S05XXSC
90
Efficiency (%)
MEJ2S03XXSC
60
5V
3.3V
50
40
15V
12V
9V
5V
3.3V
60
50
40
30
30
20
20
10
10
0
0
0
10
20
30
40
50
60
70
80
90
0
100
10
20
30
40
Load (%)
MEJ2S12XXSC
MEJ2S15XXSC
90
90
80
80
70
80
90
100
80
90
100
70
Efficiency (%)
70
Efficiency (%)
50
60
Load (%)
15V
12V
9V
5V
3.3V
60
50
40
30
60
15V
12V
9V
5V
50
40
30
20
20
10
10
0
0
0
10
20
30
40
50
60
Load (%)
70
80
90
100
0
10
20
30
40
50
60
Load (%)
70
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KDC_MEJ2_E01 Page 5 of 7
MEJ2 Series
5.2kVDC Isolated 2W DC/DC Converters
EFFICIENCY VS LOAD
MEJ2D05XXSC
MEJ2D12XXSC
90
90
80
80
70
60
Efficiency (%)
Efficiency (%)
70
15V
12V
9V
5V
3.3V
50
40
30
15V
12V
9V
5V
3.3V
60
50
40
30
20
20
10
10
0
0
0
10
20
30
40
50
60
70
80
90
100
Load (%)
0
10
20
30
40
50
60
70
80
90
100
Load (%)
MEJ2D15XXSC
90
80
Efficiency (%)
70
60
15V
12V
9V
5V
50
40
30
20
10
0
0
10
20
30
40
50
60
70
80
90
100
Load (%)
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KDC_MEJ2_E01 Page 6 of 7
MEJ2 Series
5.2kVDC Isolated 2W DC/DC Converters
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
PIN CONNECTIONS
10.05 [0.396] MAX
Single Output
0.40 [0.016] MIN
19.65 [0.774] MAX
12.65 [0.498] MAX
Pin
Function
1
2
5
7
+Vin
-Vin
-Vout
+Vout
4.10±0.50 [0.161±0.020]
1
2
5
6* 7
2.54 [0.100]
0.50 [0.020]±0.05
Dual Output
0.25 [0.010]±0.05
Pin
Function
1
2
5
6*
7
+VIN
-VIN
-VOUT
OV
+VOUT
*
2.93
2.13
[ 0.115
0.084 ]
15.24 [0.600]
2.95
1.62
0.064 ]
[ 0.116
All dimensions in mm ±0.25mm (inches ±0.01). All pins on a 2.54 (0.1) pitch and within
±0.25 (0.01) of true position.
* Pin not fitted on single output variants.
TUBE OUTLINE DIMENSIONS
6.00
(0.236)
Weight: 4.3g
RECOMMENDED FOOTPRINT DETAILS
14.20 (0.559)
x5 HOLES Ø 1.15
1.00
0.039 ]
[ Ø0.045
5.00 (0.197)
2.54 [0.100]
5.20 (0.205)
1.50 (0.059)
0.6±0.15
(0.024±0.006)
2.54 [0.100]
Unless otherwise stated all dimensions in mm ±0.5mm (inches ±0.02).
Tube length : 20.669±0.079 (525mm±2mm).
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
Tube Quantity : 25
* Hole not required for single output variants.
All dimensions in mm ±0.25mm (inches ±0.01).
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/
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.
© 2016 Murata Power Solutions, Inc.
www.murata-ps.com/support
KDC_MEJ2_E01 Page 7 of 7