CRV1 Series
www.murata.com
3kVDC Isolated 1W Single & Dual Output DC-DC Converters
Wide temperature performance at full
1 Watt load, –40°C to 85°C
mA
5
5
200
5 ±12 ±42
12 ±12 ±42
12 15
67
%
294
256
111
108
11
5
4
4
14
7
5
5
16
6.7
6
8.5
Industry standard pinout
Voltage range
3kVDC isolation (1 minute) ‘Hi Pot Test’
Reflected ripple current
5V & 12V inputs
OUTPUT CHARACTERISTICS
5V, 12V & 15V outputs
Parameter
Conditions
Rated Power
Voltage Set Point Accuracy
Line regulation
TA=-40°C to 85°C, See derating curve
See tolerance envelope
High VIN to low VIN
No electrolytic or tantalum capacitors
23
8
10
17
Efficiency (Typ)
%
67
76
77
79
70
79
81
83
pF
MIL. Tel.
kHrs
23
26
42
42
4241
1579
1287
1462
INPUT CHARACTERISTICS
Parameter
No external components required
Efficiency (Min)
mVp-p
UL 94V-0 package material
Fully encapsulated with toroidal
magnetics
Ripple & Noise (Max)1
Ripple & Noise (Typ)1
Load Regulation (Max)
Load Regulation (Typ)
Input Current at
Rated Load
Output Current
V
MTTF2
UL 60950 recognised
CRV1S0505SC
CRV1D0512SC
CRV1D1212SC
CRV1S1215SC
V
Isolation Capacitance
FEATURES
Output Voltage
Order Code
Nominal Input Voltage
SELECTION GUIDE
Conditions
Min.
Typ.
Max.
Continuous operation, 5V input types
Continuous operation, 12V input types
All input types
4.5
10.8
5
12
20
5.5
13.2
40
mA p-p
Typ.
Max.
Units
1
W
1.1
1.2
%/%
Typ.
Max.
Units
Min.
Units
V
ISOLATION CHARACTERISTICS
Parameter
Conditions
Min.
Isolation test voltage
Resistance
Flash tested for 1 minute
Viso= 1000VDC
3000
10
VDC
GΩ
PRODUCT OVERVIEW
The CRV1 series of industrial temperature range
DC-DC converters are the standard buliding blocks
for on-board distributed power systems. They
are ideally suited for providing local supplies on
control system boards with the added benefit
of 3kVDC galvanic isolation to reduce switching
noise. Available in SIP package with dual and
single output pinout. All of the rated power may be
drawn from a single output rail provided the total
loaddoes not exceed 1 watt.tjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
GENERAL CHARACTERISTICS
Parameter
Conditions
Switching frequency
5V input types
12V input types
Min.
Typ.
Max.
120
150
Units
kHz
ABSOLUTE MAXIMUM RATINGS
Lead temperature 1.5mm from case for 10 seconds
260°C
Wave Solder
Wave Solder profile not to exceed the profile recommended in IEC 61760-1 Section 6.1.3. Please refer to
application notes for further information.
Input voltage VIN, 5V input
Input voltage VIN, 12V input
7V
15V
TEMPERATURE CHARACTERISTICS
Parameter
Conditions
Min.
Specification
All output types, (see safety approval section for limitations)
-40
85
-50
125
28
25
Storage
Case Temperature above
ambient
Cooling
Typ.
5V output types
All other output types
Free air convection
Max.
Units
°C
1. See Ripple & Noise characterisation method.
2. Calculated using MIL-HDBK-217 FN2 and Telcordia SR-332 calculation model with nominal input voltage at full load.
For full details go to
https://www.murata.com/englobal/products/power/rohs
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
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KDC_CRV1.D01 Page 1 of 8
CRV1 Series
3kVDC Isolated 1W Single & Dual Output DC-DC Converters
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 CRV1 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?”
The CRV1 has been recognised by Underwriters Laboratory for functional insulation, 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 CRV1 series has toroidal isolation transformers, with no additional insulation between primary and secondary windings of enamelled 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 recognised 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.
SAFETY APPROVAL
The CRV1 series has been recognised by Underwriters Laboratory (UL) to UL 60950 for functional insulation.
The CRV1 Series of converters are not internally fused so to meet the requirements of UL 60950 an anti-surge input line fuse should always be used with ratings as defined below.
CRV1S05xxxxC: 0.5A
CRV1S12xxxxC: 0.2A
All fuses should be UL recognised and rated to at least the maximum allowable DC input voltage.
File number E151252 applies.
RoHS COMPLIANT INFORMATION
This series is compatible with RoHS soldering systems with a peak wave solder temperature of
260°C for 10 seconds. Please refer to application notes for further information. The pin termination
finish on the SIP package type is Tin Plate, Hot Dipped over Matte Tin with Nickel Preplate. Both types
in this series is backward compatible with Sn/Pb soldering systems.
For further information, please visit www.murata-ps.com/rohs
PART NUMBER STRUCTURE
CRV 1 S XX XX S C
Series name
RoHS compliant
Power rating
Package type
S - Single
D - Dual
S - SIP
D - DIP
M - Surface mount
Z - ZIP
Input voltage
Output voltage
Output type
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KDC_CRV1.D01 Page 2 of 8
CRV1 Series
3kVDC Isolated 1W Single & Dual Output DC-DC Converters
CHARACTERISATION TEST METHODS
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
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.
Typical Start-Up Wave Form
CRV1S0505SC
CRV1D0512SC
CRV1D1212SC
CRV1S1215SC
Start-up time
μs
1966
11180
8650
11171
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KDC_CRV1.D01 Page 3 of 8
CRV1 Series
3kVDC Isolated 1W Single & Dual 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 20MHz.
L
DC
Power
Source
CRV1S0505SC
CRV1D0512SC
CRV1D1212SC
CRV1S1215SC
L, μH
22
150
150
220
Inductor
SMD
82223C
82154C
82154C
82224C
C
Load
DC
Through Hole
11R223C
11R154C
11R154C
11R224C
Capacitor
C, μF
1
0.33
0.33
0.22
TEMPERATURE DERATING GRAPH
Output Power (W)
1.5
1.0
0.5
85°C
Safe Operating Area
120°C
0
-40
100
50
0
Ambient Temperature (°C)
150
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KDC_CRV1.D01 Page 4 of 8
CRV1 Series
3kVDC Isolated 1W Single & Dual Output DC-DC Converters
EFFICIENCY VS LOAD
5V Inputs
12V Inputs
90
90
80
80
70
70
60
CRV1D0512SC
50
40
CRV1S0505SC
Efficiency (%)
Efficiency (%)
60
40
30
30
20
20
10
10
0
CRV1D1212SC
50
CRV1S1215SC
0
0
10
20
30
40
50
60
70
80
90
100
0
10
20
30
Load (%)
40
50
60
70
80
90
100
Load (%)
TOLERANCE ENVELOPES
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.
CRV1S0505SC
CRV1S1215SC
10%
-1%
-5%
10
25
50
75
Output Load Current (%)
Output Voltage
Output Voltage
7%
3%
1%
0%
-3%
100
10
25
6%
4%
1%
-2%
10
25
50
75
Output Load Current (%)
100
CRV1D1212SC
100
Output Voltage
Output Voltage
CRV1D0512SC
50
75
Output Load Current (%)
3%
1%
-1%
-3%
10
25
50
75
Output Load Current (%)
100
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KDC_CRV1.D01 Page 5 of 8
CRV1 Series
3kVDC Isolated 1W Single & Dual Output DC-DC Converters
EMC FILTERING AND SPECTRA
FILTERING
The following table shows the additional input capacitor and input inductor typically required to meet EN 55022 Curve B Quasi-Peak EMC limit, as shown in the following
plots. The following plots show positive and negative quasi peak and CISPR22 Average Limit B (pink line) and Quasi Peak Limit B (green line) adherence limits. The recommended input capacitor to use for this circuit is 50V 16V X7R ceramic capacitor.
L
DC
C
DC
Inductor
Part Number
L, μH
CRV1D0512SC
CRV1S0505SC
CRV1D1212SC
CRV1S1215SC
10uH
10uH
10uH
4.7uH
SMD
Capacitor
Through Hole
C, μF
13R103C
13R103C
13R103C
13R472C
1uF
1uF
1uF
1uF
CRV1D1212SC
80
80
70
70
60
60
50
50
dBuV
dBuV
CRV1D0512SC
40
40
30
30
20
20
10
10
0
1.00E+05
1.00E+06
1.00E+07
0
1.00E+05
1.00E+08
Frequency (Hz)
70
60
60
50
50
dBuV
dBuV
80
70
40
40
30
30
20
20
10
10
1.00E+07
Frequency (Hz)
1.00E+08
CRV1S1215SC
80
1.00E+06
1.00E+07
Frequency (Hz)
CRV1S0505SC
0
1.00E+05
1.00E+06
1.00E+08
0
1.00E+05
1.00E+06
1.00E+07
1.00E+08
Frequency (Hz)
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KDC_CRV1.D01 Page 6 of 8
CRV1 Series
3kVDC Isolated 1W Single & Dual Output DC-DC Converters
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
RECOMMENDED FOOTPRINT DETAILS
19.50±0.25 [0.768±0.010]
6.00±0.25 [0.236±0.010]
2.54 [0.100]
x5 HOLES
Ø 0.045
0.039
Ø 1.15
1.00
0.4 [0.016] MIN
CRV1DxxxxSC
10.00±0.25 [0.394±0.010]
]
2.54 [0.100]
*
XYYWW
[
S
4.10±0.5 [0.161±0.020]
*Hole not required for single output variants.
0.50±0.05 [0.020±0.002]
2.54 [0.100]
5.08 [0.200]
TUBE OUTLINE DIMENSIONS
0.25±0.05 [0.010±0.002]
1
2
5
6*
7
9.3 [0.366]
(1.13 [0.044])
2.54 [0.100]
(1.93 [0.076])
15.24 [0.600]
* Pin not fitted on single output variants.
All dimensions in mm (inches) Controlling dimension is mm.
All pins on a 2.54 (0.100) pitch and within ±0.1 (0.004) of true position from pin 1 at seating plane ‘S’ position.
For SIP products, from date code D2224 onwards, products have an embossed logo on the top of the case.
Prior to this date, SIP products have a flat surface finish.
12.43 [0.489]
18.0 [0.709]
PIN CONNECTIONS
Single output
variants
Weight: 2.1g
Dual output
variants
Pin
Function
Pin
Function
1
2
5
7
VIN
GND
-Vout
+Vout
1
2
5
6*
7
VIN
GND
-Vout
OV
+Vout
5.0 [0.197]
Unless otherwise specified all dimensions in mm [inches] ±0.55mm.
Tube length : 20.47 (520mm ±2mm).
Tube Quantity : 35
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KDC_CRV1.D01 Page 7 of 8
CRV1 Series
3kVDC Isolated 1W Single & Dual Output DC-DC Converters
DISCLAIMER
Unless otherwise stated in the datasheet, all products are designed for standard commercial and industrial applications and NOT for safety-critical and/or life-critical
applications.
Particularly for safety-critical and/or life-critical applications, i.e. applications that may directly endanger or cause the loss of life, inflict bodily harm and/or loss or severe
damage to equipment/property, and severely harm the environment, a prior explicit written approval from Murata is strictly required. Any use of Murata standard products for any safety-critical, life-critical or any related applications without any prior explicit written approval from Murata shall be deemed unauthorised use.
These applications include but are not limited to:
•
Aircraft equipment
•
Aerospace equipment
•
Undersea equipment
•
Power plant control equipment
•
Medical equipment
•
Transportation equipment ( automobiles, trains, ships, etc.)
•
Traffic signal equipment
•
Disaster prevention / crime prevention equipment
•
Data Processing equipment
Murata makes no express or implied warranty, representation, or guarantee of suitability, fitness for any particular use/purpose and/or compatibility with any application or device of the buyer, nor does Murata assume any liability whatsoever arising out of unauthorised use of any Murata product for the application of the buyer. The
suitability, fitness for any particular use/purpose and/or compatibility of Murata product with any application or device of the buyer remain to be the responsibility and
liability of the buyer.
Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards that anticipate dangerous consequences of failures, monitor failures and their consequences, lessen the likelihood of failures that might cause harm, and take appropriate remedial actions. Buyer will fully indemnify and hold
Murata, its affiliated companies, and its representatives harmless against any damages arising out of unauthorised use of any Murata products in any safety-critical and/
or life-critical applications.
Remark: Murata in this section refers to Murata Manufacturing Company and its affiliated companies worldwide including, but not limited to, Murata Power Solutions.
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: https://www.murata.com/en-eu/products/power/requirements
Murata Power Solutions (Milton Keynes) Ltd. 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.
© 2022 Murata Power Solutions (Milton Keynes) Ltd.
www.murata.com
KDC_CRV1.D01 Page 8 of 8