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MER1 Series
1kVDC Isolated 1W Single Output DC/DC Converters
SELECTION GUIDE
Load Regulation (Max) Load Regulation (Typ) Ripple & Noise (Max)1 Isolation Capacitance pF
50 55 53 54 49 66 91 78 43 68 75 107 52 75 91 101 47 76 88 103
Ripple & Noise (Typ)1
Efficiency (Min.)
Input Current at Rated Load
Efficiency (Typ.)
Output Voltage
Output Current
Nominal Input Voltage
Order Code
V
V
5 9 12 15 5 9 12 15 5 9 12 15 5 9 12 15 5 9 12 15
mA
200 111 84 67 200 111 84 67 200 111 84 67 200 111 84 67 200 111 84 67
mA
233 226 227 225 97 95 93 94 79 77 76 75 50 48 48 48 26 25 25 25 5.5 4.2 4.6 4.4 4.5 3 3 2.4 3.8 2.4 2.3 2.4 3.1 2.1 1.8 1.7 3.4 2.4 2.0 1.9
%
6.5 5 5.2 5 5 3.4 3.4 2.7 4.5 2.8 2.7 2.8 3.7 2.5 2.4 2.3 3.9 2.8 2.4 2.4
mVp-p
15 11 9 9 11 9 9 7 10 8 7 7 15 10 9 9 19 14 12 11 25 20 17 17 20 17 17 17 20 17 15 15 25 20 20 20 30 25 25 25
%
82 84 85 86 82 84 86 85 81 83 84 86 81 83 84 84 77 80 79 80
%
84 87 87 87.5 84 86.5 88.5 88 83.5 86.5 87.5 89 84 86.5 87.5 87.5 79.5 83 82.5 83
kHrs
FEATURES
RoHS compliant Typical efficiency to 89% Wide temperature performance at full load, -40C to 85C UL 94V-0 package material No heatsink required Industry standard pinout 1kVDC isolation 5V, 12V, 15V, 24V, & 48V inputs 5V, 9V, 12V, & 15V output Fully encapsulated with toroidal magnetics No external components required No electrolytic or tantalum capacitors UL 60950 recognition pending
MER1S0505SC MER1S0509SC MER1S0512SC MER1S0515SC MER1S1205SC MER1S1209SC MER1S1212SC MER1S1215SC MER1S1505SC MER1S1509SC MER1S1512SC MER1S1515SC MER1S2405SC MER1S2409SC MER1S2412SC MER1S2415SC MER1S4805SC MER1S4809SC MER1S4812SC MER1S4815SC
5 5 5 5 12 12 12 12 15 15 15 15 24 24 24 24 48 48 48 48
INPUT CHARACTERISTICS
Parameter Conditions
Continuous operation, 5V input types Continuous operation, 12V input types Continuous operation, 15V input types Continuous operation, 24V input types Continuous operation, 48V input types 5V input types 12V input types 15V input types 24V input types 48V input types
Min.
4.5 10.8 13.5 22.6 43.2
Typ.
5 12 15 24 48 7 4 4 8 25
Max.
5.5 13.2 16.5 26.4 52.8 15 12 12 20 40
Units
PRODUCT OVERVIEW
The MER1 series is the new high performance version of our 1W NMR series. The MER1 series is more efficient and offers improved regulation performance 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 1kVDC galvanic isolation to reduce switching noise.
Voltage Range
V
Reflected Ripple Current
mA p-p
ABSOLUTE MAXIMUM RATINGS
Lead temperature 1.5mm from case for 10 seconds Input voltage VIN, 5Vin types Input voltage VIN, 12Vin types Input voltage VIN, 15Vin types Input voltage VIN, 24Vin types Input voltage VIN, 48Vin types 260C 7V 15V 18V 28V 54V
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.
For full details go to www.murata-ps.com/rohs
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Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
2009/09/15
KDC_MER1.A01 Page 1 of 6
MTTF2
MER1 Series
1kVDC Isolated 1W Single Output DC/DC Converters
OUTPUT CHARACTERISTICS
Parameter
Rated Power Voltage Set Point Accuracy Line regulation
Conditions
TA=-40C to 85C See tolerance envelope High VIN to low VIN
Min.
Typ.
Max.
1
Units
W %/%
1.05
1.1
ISOLATION CHARACTERISTICS
Parameter
Isolation test voltage Resistance
Conditions
Flash tested for 1 second Viso= 1000VDC
Min.
1000 10
Typ.
Max.
Units
VDC G
GENERAL CHARACTERISTICS
Parameter
Switching frequency
Conditions
5V & 48V input types 12V & 15V input types 24V input types
Min.
Typ.
62 75 82
Max.
Units
kHz
TEMPERATURE CHARACTERISTICS
Parameter
Specification Storage Case Temperature rise above ambient Cooling
Conditions
All output types 5V, 12V, & 15V input types 24V & 48V input types Free air convection
Min.
-40 -50
Typ.
Max.
85 125 15 20
Units
C
TEMPERATURE DERATING GRAPH 1.5
OUTPUT VOLTAGE TOLERANCE ENVELOPE
5%
Output Voltage
2% VNOM 0%
Output Power (W)
1.0 0.5 0 -40
85C
10
25
50
75
-4% 100
100 50 0 Ambient Temperature (C)
150
Output Load Current (%) 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.
RoHS COMPLIANT INFORMATION
This series is compatible with RoHS soldering systems with a peak wave solder temperature of 260C 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
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2009/09/15
KDC_MER1.A01 Page 2 of 6
MER1 Series
1kVDC Isolated 1W Single Output 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 2.2s and output capacitance of 10F, are shown in the table below. The product series will start into a capacitance of 47F with an increased start time, however, the maximum recommended output capacitance is 10F. Start-up time s 600 1730 3780 6700 750 2605 3754 5280 704 1859 Start-up time s 3375 5090 431 245 1634 2682 512 1432 2528 3884
Typical Start-Up Wave Form
MER1S0505SC MER1S0509SC MER1S0512SC MER1S0515SC MER1S1205SC MER1S1209SC MER1S1212SC MER1S1215SC MER1S1505SC MER1S1509SC
MER1S1512SC MER1S1515SC MER1S2405SC MER1S2409SC MER1S2412SC MER1S2415SC MER1S4805SC MER1S4809SC MER1S4812SC MER1S4815SC
Ripple & Noise Characterisation Method
Ripple and noise measurements are performed with the following test configuration.
C1
1F X7R multilayer ceramic capacitor, voltage rating to be a minimum of 3 times the output voltage of the DC/DC converter 10F 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 C2 than 100m at 100 kHz C3 100nF multilayer ceramic capacitor, general purpose R1 450 resistor, carbon film, 1% tolerance R2 50 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 Converter OSCILLOSCOPE
C1 C2 C3 +
SUPPLY Input
R1
T1
R2
Y INPUT
+
Output
-
-
R LOAD
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2009/09/15
KDC_MER1.A01 Page 3 of 6
MER1 Series
1kVDC Isolated 1W Single Output DC/DC Converters
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. L
Power Source
DC
C Load
DC
Capacitor C, F 4.7 2.2 1 1 4.7 2.2 1 1 4.7 2.2 1 1 4.7 2.2 1 1 4.7 2.2 1 1
MER1S0505SC MER1S0509SC MER1S0512SC MER1S0515SC MER1S1205SC MER1S1209SC MER1S1212SC MER1S1215SC MER1S1505SC MER1S1509SC MER1S1512SC MER1S1515SC MER1S2405SC MER1S2409SC MER1S2412SC MER1S2415SC MER1S4805SC MER1S4809SC MER1S4812SC MER1S4815SC
L, H 10 22 47 47 10 22 47 47 10 22 47 47 10 22 47 47 10 22 47 47
Inductor SMD 82103C 82223C 82473C 82473C 82103C 82223C 82473C 82473C 82103C 82223C 82473C 82473C 82103C 82223C 82473C 82473C 82103C 82223C 82473C 82473C
Through Hole 11R103C 11R223C 11R473C 11R473C 11R103C 11R223C 11R473C 11R473C 11R103C 11R223C 11R473C 11R473C 11R103C 11R223C 11R473C 11R473C 11R103C 11R223C 11R473C 11R473C
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 MER1 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?" For a part holding no specific agency approvals, such as the MER1 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 MER1 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.
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Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
2009/09/15
KDC_MER1.A01 Page 4 of 6
MER1 Series
1kVDC Isolated 1W Single Output DC/DC Converters
EFFICIENCY VS LOAD MER1S05XXSC
90 80 70 Efficiency (%) 60 50 40 30 20 10 0 0 10 20 30 40 50 60 Load (%) 70 80 90 100 5V
Efficiency (%)
MER1S12XXSC
90 80 70 60 50 40 30 20 10 0 0 10 20 30 40 50 Load (%) 60 70 80 90 100 15V 9V 12V 5V
9V 12V 15V
MER1S15XXSC
90 80 70 Efficiency (%) 60 50 40 30 20 10 0 0 10 20 30 40 50 Load (%) 60 70 80 90 100 15V 12V 9V 5V
MER1S24XXSC
90 80 70 Efficiency (%) 60 50 40 30 20 10 0 0 10 20 30 40 50 Load (%) 60 70 80 90 100 15V 12V 9V 5V
MER1S48XXSC
90 80 70 Efficiency (%) 60 50 40 30 20 10 0 0 10 20 30 40 50 Load (%) 60 70 80 90 100 15V 12V 9V 5V
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Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
2009/09/15
KDC_MER1.A01 Page 5 of 6
MER1 Series
1kVDC Isolated 1W Single Output DC/DC Converters
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
0.774 (19.65) (Max.)
RECOMMENDED FOOTPRINT DETAILS
0.242 (6.15) Max. 0.4 (10.15) Max. 1 0.181 (4.60) 0.141 (3.60) 0.0740.02 (1.880.50) 0.0118 (0.30) 0.0079 (0.20) 0.05 (1.25) 0.5 (12.70)
MER1S0505SC
XYYWWi
0.0016 (0.4) Min.
2
4
6
0.1 (2.54)
Unless otherwise stated all dimensions in inches (mm) 0.5mm.
TUBE OUTLINE DIMENSIONS
Unless otherwise stated, 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. 48V input variants: 0.301 (7.65). Weight: 48Vin types: 2.75g (Typ.), all other types: 2.25g (Typ.)
PIN CONNECTIONS Pin
1 2 4 6
Function
+VIN -VIN -VOUT +VOUT
Unless otherwise stated all dimensions in inches (mm) 0.5mm. Tube length : 20.47 (520mm 2mm).
Tube Quantity : 25
Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 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) 2009 Murata Power Solutions, Inc.
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2009/09/15
KDC_MER1.A01 Page 6 of 6

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