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MEV Series
3kVDC Isolated 1W Single Output DC/DC Converters
SELECTION GUIDE
Load Regulation (Typ) Load Regulation (Max) Efficiency (Min.) Input Current at Rated Load Efficiency (Typ.) Output Current Ripple & Noise (Typ)1 Ripple & Noise (Max)1 Nominal Input Voltage Isolation Capacitance pF
38 42 40 39 28 50 70 59
Output Voltage
Order Code
V
MEV1S0505SC MEV1S0509SC MEV1S0512SC MEV1S0515SC MEV1S1205SC MEV1S1209SC MEV1S1212SC MEV1S1215SC 5 5 5 5 12 12 12 12
V
5 9 12 15 5 9 12 15
mA
200 111 84 67 200 111 84 67
mA
233 227 226 225 98 96 94 94 5.2 4 4.5 4.2 4.4 2.9 2.9 2.4
%
6 5 5.5 5 4.8 3.2 3.1 2.8
mVp-p
20 12 10 8 12 8 7 7 30 20 20 15 15 15 15 15
%
80.5 82.5 84 84.5 80 83 84 82
%
84 86 87 87 83.5 86 87 87
kHrs
3583 3286 2886 2419 3308 3054 2705 2290
FEATURES
RoHS compliant Efficiency from 80% Power density 0.85W/cm3 Wide temperature performance at full 1 Watt load, -40C to 85C UL 94V-0 package material No heatsink required Industry standard pinout 3kVDC isolation (1 minute) 5V & 12V input 5V, 9V, 12V, & 15V output Fully encapsulated with toroidal magnetics No external components required No electrolytic or tantalum capacitors
When operated with additional external load capacitance the rise time of the input voltage will determine the maximum external capacitance value for guaranteed start up. The slower the rise time of the input voltage the greater the maximum value of the additional external capacitance for reliable start up.
INPUT CHARACTERISTICS
Parameter
Voltage range Reflected ripple current
Conditions
Continuous operation, 5V input types Continuous operation, 12V input types 5V input types 12V input types
Min.
4.5 10.8
Typ.
5 12 11 5
Max.
5.5 13.2 20 15
Units
V mA p-p
ABSOLUTE MAXIMUM RATINGS
Lead temperature 1.5mm from case for 10 seconds Internal power dissipation Input voltage VIN, MEV05 types Input voltage VIN, MEV12 types 300C 300mW 7V 15V
OUTPUT CHARACTERISTICS
Parameter Conditions
TA=-40C to 85C See tolerance envelope High VIN to low VIN
Min.
Typ.
Max.
1
Units
W %/%
PRODUCT OVERVIEW
The MEV series is the new high performance version of our 1W NMV series. The MEV series is more efficient and offers improved regulation performance 5% for applications where a wide output voltage variation can not be tolerated. They are ideally suited for providing local supplies on control system boards with the added benefit of 3kVDC galvanic isolation to reduce switching noise. The MEV series is currently available in an industry SIP 7 package.
Rated Power Voltage Set Point Accuracy Line regulation
1.05
1.2
ISOLATION CHARACTERISTICS
Parameter
Isolation test voltage Resistance
Conditions
Flash tested for 1 minute Viso= 1000VDC
Min.
3000 10
Typ.
Max.
Units
VDC G
GENERAL CHARACTERISTICS
Parameter
Switching frequency
Conditions
5V input types 12V input types
Min.
Typ.
60 75
Max.
Units
kHz
TEMPERATURE CHARACTERISTICS
Parameter
Specification Storage Case Temperature above ambient Cooling
For full details go to www.murata-ps.com/rohs
Conditions
All output types 5V output types All other output types Free air convection
Min.
-40 -50
Typ.
Max.
85 125 20 20
Units
C
1. See Ripple & Noise characterisation method. 2. Calculated using MIL-HDBK-217F FN2 with nominal input voltage at full load. All specifications typical at TA=25C, nominal input voltage and rated output current unless otherwise specified.
www.murata-ps.com
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
KDC_MEVC.A01 Page 1 of 4
MTTF2
MEV Series
3kVDC Isolated 1W Single Output DC/DC Converters
TEMPERATURE DERATING GRAPH 1.5 TOLERANCE ENVELOPE
5%
Output Voltage
Output Power (W)
1.0 0.5 0 -40
85C
Typic a
2%
l Loa d Lin e
VNOM
0%
Safe Operating Area
100 50 0 Ambient Temperature (C)
150
10
25
50
75
-4% 100
Output Load Current (%)
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 MEV series of DC/DC converters are all 100% production tested at their stated isolation voltage. This is 3kVDC for 1 minute. A question commonly asked is, "What is the continuous voltage that can be applied across the part in normal operation?" For a part holding no specific agency approvals, such as the MEV series, 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 system. 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 MEV 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 300C for 10 seconds. The pin termination finish on the SIP package type is Tin Plate, Hot Dipped over Matte Tin with Nickel Preplate. The DIP types are Matte Tin over Nickel Preplate. Both types in this series are backward compatible with Sn/Pb soldering systems. For further information, please visit www.murata-ps.com/rohs
www.murata-ps.com
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
KDC_MEVC.A01 Page 2 of 4
MEV Series
3kVDC Isolated 1W Single Output DC/DC Converters
RIPPLE & NOISE CHARACTERISATION METHOD
All measurement to be taken with the following components connected to the UUT as detailed below. 50 Ohm coax cable, solder connections one end, BNC plug at the other end. C1 C2 C3 R1 R2 T1 - 1F X7R multilayer ceramic capacitor rated at minimum 3 x the output voltage of the UUT - 10F tantalum capacitor rated at minimum 1.5 x the output voltage of the UUT with ESR of less than 100 milliohms at 100 kHz e.g. AVX TPS series. - 100nF multilayer ceramic capacitor, general purpose - 450 Ohm resistor, carbon film, 1% - 50 Ohm BNC termination - 3T of the coax cable through a ferrite toroid eg Ferroxcube TN32/19/13-3E25
RLOAD - Resistive load at the UUT maximum rating. Connections via twisted wires.
Differential Mode Noise Test Schematic
DC/DC Converter OSCILLOSCOPE
C1 C2 C3 +
SUPPLY Input
R1
T1
R2
Y INPUT
+
Output
-
-
R LOAD
EFFICIENCY VS LOAD MEV 5V Input Voltage
90 80 Efficiency (%) 70 60 50 40 30 20 10 0 0 10 20 30 40 50 Load (%) 60 70 80 90 100 15V 12V 9V 5V
MEV 12V Input Voltage
90 80 Efficiency (%) 70 60 50 40 30 20 10 0 0 10 20 30 40 50 Load (%) 60 70 80 90 100 15V 12V 9V 5V
www.murata-ps.com
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
KDC_MEVC.A01 Page 3 of 4
MEV Series
3kVDC Isolated 1W Single Output DC/DC Converters
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
0.77 (19.50) 0.236 (6.00)
RECOMMENDED FOOTPRINT DETAILS
4 HOLES
O 0.045 (1.15) 0.040 (1.00)
0.00394 (0.1)
0.1 (2.54)
0.394 (10.00)
MEV1S0505SC
XYYWWi
0.0016 (0.40) Min.
12 0.181 (4.60) 0.142 (3.60)
5
7 0.50 (0.020)
0.1 (2.54)
Unless otherwise stated all dimensions in inches (mm) 0.5mm.
0.1 (2.54) 0.099 (2.52) 0.061 (1.54)
0.0118 (0.30) 0.0079 (0.20)
TUBE OUTLINE DIMENSIONS
0.049 (1.25)
0.6 (15.24)
Weight: 2.3g
All dimensions in inches 0.01 (mm 0.25mm). All pins on a 0.1 (2.54) pitch and within 0.01 (0.25) of true position.
PIN CONNECTIONS Pin
1 2 5 7
Function
+VIN -VIN -VOUT +VOUT
Unless otherwise stated all dimensions in inches (mm) 0.5mm. Tube length : 20.47 (520mm 2mm).
Tube Quantity : 25
USA: Canada: UK:
Mansfield (MA), Tel: (508) 339 3000, email: sales@murata-ps.com Toronto, Tel: (866) 740 1232, email: toronto@murata-ps.com Milton Keynes, Tel: +44 (0)1908 615232, email: mk@murata-ps.com Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: france@murata-ps.com Tokyo, Tel: 3-3779-1031, email: sales_tokyo@murata-ps.com Osaka, Tel: 6-6354-2025, email: sales_osaka@murata-ps.com Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com
Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
www.murata-ps.com email: sales@murata-ps.com ISO 9001 & ISO 14001 REGISTERED
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. (c) 2008 Murata Power Solutions, Inc.
France: Japan: China:
Germany: Munchen, Tel: +49 (0)89-544334-0, email: ped.munich@murata-ps.com
Singapore: Parkway Centre, Tel: +65 6348 9096, email: singapore@murata-ps.com
www.murata-ps.com
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
KDC_MEVC.A01 Page 4 of 4

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