DC/DC Converters. CMR0512S3C Datasheet

CMR0512S3C Converters. Datasheet pdf. Equivalent

CMR0512S3C Datasheet
Recommendation CMR0512S3C Datasheet
Part CMR0512S3C
Description Isolated 0.75W Single and Dual Output Isolated DC/DC Converters
Feature CMR0512S3C; www.murata-ps.com CMR Series Isolated 0.75W Single and Dual Output Isolated DC/DC Converters SELECT.
Manufacture Murata
Datasheet
Download CMR0512S3C Datasheet




Murata CMR0512S3C
www.murata-ps.com
CMR Series
Isolated 0.75W Single and Dual Output Isolated DC/DC Converters
SELECTION GUIDE
FEATURES
„Single or Dual Isolated Outputs
„1kVDC or 3kVDC options
„Wide temperature performance at full
„0.75W load -40 C to 85C°
„Industry Standard Pinouts
„5V, 12V and 24V Inputs
„5V, 12V and 15V Outputs
„Pin compatible with NMR, MER1, MMV,
MEV1, NMK, MEV3, NMV series.
DESCRIPTION
The CMR series are a cost effective 0.75W DC/DC
converter series, in an industry standard package
with industry standard pinouts., Popular input and
output voltages are available as a lower power
alternative to a 1W DC/DC converter. The galvanic
isolation allows the device to be configured to
provide an isolated negative rail in systems where
only positive rails exist. The wide temperature
range guarantees startup from –40°C and full
0.75 watt output at 85°C.
Order Code
mV p-p
%
V V mA Typ. Max Typ. Max. mA Min. Typ. pF kHrs
CMR100C
5 5 150 9 11 6 10 218 65 69 30 1850
CMR118C
24 5 150 6.8 10 8 15
46 65 70 60 1250
3KVDC Isolation Options
CMR0505SA3C 5
5 150 9 11 15 25
220 64 68 30 4240
CMR0512S3C 5 ±12 ±31 5 6 6.7 8
192 74 78 30 1560
CMR0515S3C 5 ±15 ±25 4 6 6.3 8.2
188 76 79 30 1060
CMR1215S3C 12 ±15 ±25 3 4.5 6.5 13
80 76 79 40
925
INPUT CHARACTERISTICS
Parameter
Conditions
Continuous operation, 5V input types
Voltage range
Continuous operation, 12V input types
Continuous operation, 24V input types
Reflected ripple current
5V & 12V input types
24V input types
Min. Typ. Max. Units
4.5 5 5.5
10.8 12 13.2
V
21.6 24 26.4
2.6 4
mA p-p
10 15
OUTPUT CHARACTERISTICS
Parameter
Conditions
Rated Power2
TA=-40°C to 85°C
Voltage Set Point Accuracy See tolerance envelope
Line regulation
High VIN to low VIN
Min. Typ. Max. Units
0.75 W
1.0 1.2 %/%
ISOLATION CHARACTERISTICS
Parameter
Conditions
Isolation voltage
C versions flash tested for 1 second
3C versions flash tested for 1 minute
Resistance
Viso=1000VDC
Min. Typ. Max. Units
1000
3000
VDC
10 GΩ
ABSOLUTE MAXIMUM RATINGS
Lead temperature 1.5mm from case for 10 seconds
5V input types
12V input types
24V input types
260°C
7V
15V
28V
1. Calculated using MIL-HDBK-217FN2 with nominal input voltage at full load.
2. See derating graph.
3. See ripple & noise characterisation 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
www.murata-ps.com/support
KDC_CMR.A03 Page 1 of 6



Murata CMR0512S3C
GENERAL CHARACTERISTICS
Parameter
Conditions
5V input types
Switching frequency
12V input types
24V input types
CMR Series
Isolated 0.75W Single and Dual Output Isolated DC/DC Converters
Min. Typ. Max. Units
110
120 kHz
80
TEMPERATURE CHARACTERISTICS
Parameter
Conditions
Specification
All output types
Storage
5V output types
Case Temperature above ambient
All other output types
Cooling
Free air convection
Min. Typ. Max. Units
-40 85
-50 125
°C
33
28
TOLERANCE ENVELOPES
All 5Voutput types
+10%
+6%
+2%
VNOM
Typical Load Line
+4%
0%
-4%
All other output types
+8%
+5%
+2%
V
NOM
Typical Load Line
+3%
0%
-3%
10 25 50 75 100
Output Load Current (%)
10 25 50 75 100
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.
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 CMR series of DC/DC converters are all 100% production tested at their stated isolation voltage. This is 1kVDC for 1 second for C versions and 3kVDC
for 1 minute for 3C versions.
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 CMR 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 CMR 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 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
www.murata-ps.com/support
KDC_CMR.A03 Page 2 of 6



Murata CMR0512S3C
CMR Series
Isolated 0.75W Single and Dual Output Isolated 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.
CMR100C
CMR118C
CMR0505SA3C
CMR0512S3C
CMR0515S3C
CMR1215S3C
Start-up time
μs
2300
670
1970
11200
16300
11200
Typical Start-Up Wave Form
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
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 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.
Differential Mode Noise Test Schematic
SUPPLY
DC/DC Converter
++
Input Output
--
C1 C2 C3 R1
OSCILLOSCOPE
T1 R2
Y INPUT
R LOAD
www.murata-ps.com/support
KDC_CMR.A03 Page 3 of 6







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