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NCS6 Series
Isolated 6W 4:1 Input Single & Dual Output DC/DC Converters
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For full details go to
www.murata-ps.com/rohs
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SELECTION GUIDE
Order Code2
Input
Voltage Output
Voltage
Output
Current Input Current Ripple &
Noise
(Typ.)
Effi ciency
MTTF1
Nom. 100%
Load
0%
Load
100%
Load Min. Typ.
VVA mA mA mV p-p % % Hrs
NCS6D1205C 12 ±5 ±0.6 7 610 15 80 82 384,470
NCS6D1212C 12 ±12 ±0.25 10 580 10 82 86 406,121
NCS6D1215C 12 ±15 ±0.2 12 580 20 84 87 344,957
NCS6S1203C 12 3.3 1.52 10 550 30 75 78 662,073
NCS6S1205C 12 5 1.2 7 610 30 79 82 521,975
NCS6S1212C 12 12 0.5 10 580 30 84 86 435,567
NCS6S1215C 12 15 0.4 12 580 30 85 87 437,582
NCS6D4805C 48 ±5 ±0.6 6 160 50 79 80 373,195
NCS6D4812C 48 ±12 ±0.25 7 150 30 82 84 391,563
NCS6D4815C 48 ±15 ±0.2 7 150 30 82 84 330,752
NCS6S4803C 48 3.3 1.52 10 150 40 73 76 483,460
NCS6S4805C 48 5 1.2 6 160 30 78 80 441,850
NCS6S4812C 48 12 0.5 7 150 30 82 84 408,555
NCS6S4815C 48 15 0.4 7 150 30 83 84 416,319
INPUT CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Voltage range 12V input types 9 12 36 V
48V input types 18 48 75
Under voltage lock out
Turn on threshold 12V input types 8.5
V
Turn off threshold 12V input types 7.5
Turn on threshold 48V input types 16.7
Turn off threshold 48V input types 15.8
Refl ected ripple current
12V input types Single output types 12
Dual output types 4
48V input types Single output types 9 mA p-p
Dual output types 6
OUTPUT CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Rated power 5V, 12V & 15V output types 6 W
3.3V output types 5
Voltage set point accuracy Positive outputs ±2
Negative outputs ±3 %
Line regulation Low line to high line Positive outputs 0.002 0.2 %
Negative outputs 0.09 0.7
Load Regulation 10% total load to
100% total load
3V outputs 0.5 0.6
%
5V positive outputs 0.3 0.5
12V & 15V positive outputs 0.06 0.2
All negative outputs 0.2 1.0
Cross Regulation
% voltage change on
negative output when
positive load varies
from 12.5% to 37.5%
with negative load fi xed
at 50%
5V 5
%
12V & 15V 2.5
Start-up Time
3.3V & 5V output
types
Single output types 2.5
mS
Dual output types 25
12V output types Single output types 4.6
Dual output types 11
15V output types Single output types 5.5
Dual output types 14
1 Calculated using MIL-HDBK-217F FN2, parts stress method with nominal input voltage at full load.
2. For shorter pin length, insert suffi x ‘L5’ prior to the ‘C’, i.e. NCS6D1205L5C.
All specifi cations typical at TA=25°C, nominal input voltage and rated output current unless otherwise specifi ed.
FEATURES
UL 60950 recognized
RoHS compliant
4:1 Wide range voltage input
Operating temperature range –40°C to
85°C
Typical load regulation from 0.06%
1.5kVDC Isolation
Typical effi ciency to 87%
12V & 48V Nominal input
Power density 0.94W/cm3
UL 94V-0 Package materials
No electrolytic capacitors
Low noise
Under voltage lock out
Current fold back
PRODUCT OVERVIEW
The NCS6 series of DC/DC converters offers
single & dual output voltages from input voltage
ranges of 9-36V and 18-75V. The NCS6 is housed
in an industry standard package with a standard
pinout. The NCS6 is packaged in a metal case for
improved EMI shielding and is also encapsulated
for superior thermal performance.
Applications include telecommunications, battery
powered systems, process control and distributed
power systems.
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NCS6 Series
Isolated 6W 4:1 Input Single & Dual Output DC/DC Converters
2011-05-19 KDC_NCS6C.D01 Page 2 of 10
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ISOLATION CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Isolation test voltage Flash tested for 1 seconds 1500 VDC
Resistance Viso = 1kVDC 1 GΩ
Capacitance 225 pF
ABSOLUTE MAXIMUM RATINGS
Short-circuit protection (for SELV input voltages) Continuous
Internal power dissipation 2.1W
Lead temperature 1.0mm from case for 10 seconds
(to JEDEC JESD22-B106 ISS C) 260°C
Minimum output load for specifi cation (see application notes) 10% of rated load
Input voltage, NCS6 12V input types 40V
Input voltage, NCS6 48V input types 80V
GENERAL CHARACTERISTICS1
Parameter Conditions Min. Typ. Max. Units
Switching frequency 180 kHz
TEMPERATURE CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Operation -40 85
°C
Storage -50 125
Case temperature rise above ambient 100% Load, Nom VIN,
Still Air
48VIN Dual outputs
5V 36
12V 32
15V 31
All other output types
3.3V 32
5V 32
12V 28
15V 26
Thermal shutdown Case Temperature 105
APPLICATION NOTES
Output Capacitors
The NCS6 series does not require output capacitors to meet datasheet specifi cation. To meet datasheet specifi cation, total output capacitance should not exceed:
Output Voltage (V) Output Capacitance (µF)
3.3 470
5 470
12 220
15 220
Minimum Load
The minimum load to meet full datasheet specifi cation is 10% of the full rated load across the specifi ed input voltage range.
Between 0% and 10% output loading, the output voltage will remain within data sheet specifi cation however, output ripple and noise will increase as well as a decrease in
accuracy on negative outputs.
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NCS6 Series
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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 specifi ed time, across a component designed to provide electrical isolation, to verify the integrity of that isolation.
Murata Power Solutions NCS6 series of DC/DC converters are all 100% production tested at their stated isolation voltage. This is 1.5kVDC for 1 second.
A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?”
The NCS6 has been recognized by Underwriters Laboratory for functional isolation. 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 NCS6 series has an ER ferrite core, 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 specifi ed 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.
SAFETY APPROVAL
The NCS6 series has been recognised by Underwriters Laboratory (UL) to UL 60950 for functional insulation in a maximum ambient temperature of 85ºC and/or case temperature
limit of 120ºC (case temperature measured on the face opposite the pins). File number E179522 applies.
Note: This series gained UL 60950 recognition for products manufactured on or after datecode G1114, any NCS6 parts manufactured before this date code should not be considered
UL 60950 recognized. Any NCS6 that is UL recognized will be printed with the UL logo.
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 fi nish
on this product series is a Gold fl ash (0.05-0.10 micron) over Nickel Preplate. The series is backward compatible with Sn/Pb soldering systems.
For further information, please visit www.murata-ps.com/rohs
CHARACTERISATION TEST METHODS
Ripple & Noise Characterisation Method
Ripple and noise measurements are performed with the following test confi guration.
C1 1µF X7R m ultilayer 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 100m at 100 kHz
C3 100nF multilayer ceramic capacitor, general purpose
R1 450 resistor, carbon fi lm, ±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 specifi ed values.
Differential Mode Noise Test Schematic
OSCILLOSCOPE
Y INPUT
SUPPLY
C1 C2 C3 R1 T1 R2
Input Output
DC/DC Converter
R LOAD
+
+
-
-
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NCS6 Series
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EFFICIENCY VS LOAD
NCS6S1203C NCS6S1205C
NCS6S1212C NCS6S1215C
NCS6S4803C NCS6S4805C
NCS6S4812C NCS6S4815C
Load (%)
Efficiency (%)
0
10
20
30
40
50
60
70
80
90
10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 110%
24V 48V
Load (%)
Efficiency (%)
0
10
20
30
40
50
60
70
80
90
10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 110%
24V 48V
0
10
20
30
40
50
60
70
80
90
100
10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 110%
Load (%)
Efficiency (%)
24V
48V
0
10
20
30
40
50
60
70
80
90
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Load (%)
Efficiency (%)
24V
12V
0
10
20
30
40
50
60
70
80
90
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Load (%)
Efficiency (%)
24V
12V
0
10
20
30
40
50
60
70
80
90
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Load (%)
Efficiency (%)
24V
12V
73
74
75
76
77
78
79
80
81
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Load (%)
Efficiency (%)
24V
12V
0
10
20
30
40
50
60
70
80
90
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Load (%)
Efficiency (%)
48V
24V
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EFFICIENCY VS LOAD
NCS6D1205C NCS6D1212C
NCS6D1215C NCS6D4805C
NCS6D4812C NCS6D4815C
50
55
60
65
70
75
80
85
90
10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 110%
Load (%)
Efficiency (%)
24V
48V
60
65
70
75
80
85
90
10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 110%
Load (%)
Efficiency (%)
24V
12V
60
65
70
75
80
85
90
10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 110%
Load (%)
Efficiency (%)
24V
12V
60
65
70
75
80
85
10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 110%
Load (%)
Efficiency (%)
24V
48V
60
62
64
66
68
70
72
74
76
78
80
10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 110%
Load (%)
Efficiency (%)
24V
12V
24V
48V
50
55
60
65
70
75
80
85
90
10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 110%
Load (%)
Efficiency (%)
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TEMPERATURE DERATING
NCS6S1203C NCS6S1205C
NCS6S1212C NCS6S1215C
NCS6S4803C NCS6S4805C
NCS6S4812C NCS6S4815C
0
1
2
3
4
5
6
7
-40-30-20-100 1020304050607080
Ambient Temperature (ºC)
Output Power (W)
still air
100 lfm
200 lfm
400 lfm
0
1
2
3
4
5
6
7
-40-30-20-100 1020304050607080
Ambient Temperature (ºC)
Output Power (W)
still air
100 lfm
200 lfm
400 lfm
0
1
2
3
4
5
6
7
-40-30-20-100 1020304050607080
Ambient Temperature (ºC)
Output Power (W)
still air
100 lfm
200 lfm
400 lfm
0
1
2
3
4
5
6
7
-40-30-20-100 1020304050607080
Ambient Temperature (ºC)
Output Power (W)
still air
100 lfm
200 lfm
400 lfm
0
1
2
3
4
5
6
7
-40-30-20-100 1020304050607080
Ambient Temperature (ºC)
Output Power (W)
still air
100 lfm
200 lfm
400 lfm
0
1
2
3
4
5
6
7
-40-30-20-100 1020304050607080
Ambient Temperature (ºC)
Output Power (W)
still air
100 lfm
200 lfm
400 lfm
Ambient Temperature (ºC)
0
1
2
3
4
5
6
-40-30-20-100 1020304050607080
Output Power (W)
100 lfm
200 lfm
400 lfm
still air
Ambient Temperature (ºC)
0
1
2
3
4
5
6
-40-30-20-100 1020304050607080
Output Power (W)
100 lfm
200 lfm
400 lfm
still air
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TEMPERATURE DERATING
NCS6D1205C NCS6D1212C
NCS6D1215C NCS6D4805C
NCS6D4812C NCS6D4815C
Ambient Temperature (ºC)
0
1
2
3
4
5
6
7
-40-30-20-100 1020304050607080
Output Power (W)
100 lfm
200 lfm
400 lfm
still air
Ambient Temperature (ºC)
0
1
2
3
4
5
6
7
-40-30-20-100 1020304050607080
Output Power (W)
100 lfm
200 lfm
400 lfm
still air
Ambient Temperature (ºC)
0
1
2
3
4
5
6
7
-40-30-20-100 1020304050607080
Output Power (W)
100 lfm
200 lfm
400 lfm
still air
Ambient Temperature (ºC)
0
1
2
3
4
5
6
7
-40-30-20-100 1020304050607080
Output Power (W)
100 lfm
200 lfm
400 lfm
still air
0
1
2
3
4
5
6
7
-40-30-20-100 1020304050607080
Ambient Temperature (ºC)
Output Power (W)
100 lfm
200 lfm
400 lfm
still air
Ambient Temperature (ºC)
0
1
2
3
4
5
6
7
-40-30-20-100 1020304050607080
Output Power (W)
100 lfm
200 lfm
400 lfm
still air
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Isolated 6W 4:1 Input Single & Dual Output DC/DC Converters
2011-05-19 KDC_NCS6C.D01 Page 8 of 10
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EMC FILTERING AND SPECTRA
FILTERING
The module includes a basic level of fi ltering, the following table shows the additional input capacitor typically required to meet EN 55022 Curve A Quasi-Peak EMC limit, as
shown in the below plots.
NCS6D1205C NCS6D1212C
NCS6D1215C NCS6D4805C
NCS6D4812C NCS6D4815C
0
10
20
30
40
50
60
70
80
90
100000 1000000 10000000 1000000
0
Frequency (Hz)
Conducted Emissions (dBuV)
NCS6D1205C 2.2µF NCS6S1203C 4.7µF
NCS6D1212C none NCS6S1205C 4.7µF
NCS6D1215C none NCS6S1212C 10µF
NCS6D4805C 10µF NCS6S1215C 10µF
NCS6D4812C 10µF NCS6S4803C 4.7µF
NCS6D4815C 10µF NCS6S4805C 10µF
NCS6S4812C 10µF
NCS6S4815C 10µF
0
10
20
30
40
50
60
70
80
90
100000 1000000 10000000 100000000
Frequency (Hz)
Conducted Emissions (dBuV)
0
10
20
30
40
50
60
70
80
90
100000 1000000 10000000 100000000
Frequency (Hz)
Conducted Emissions (dBuV)
0
10
20
30
40
50
60
70
80
90
100000 1000000 10000000 100000000
Frequency (Hz)
Conducted Emissions (dBuV)
0
10
20
30
40
50
60
70
80
90
100000 1000000 10000000 100000000
Frequency (Hz)
Conducted Emissions (dBuV)
0
10
20
30
40
50
60
70
80
90
100000 1000000 10000000 100000000
Frequency (Hz)
Conducted Emissions (dBuV)
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EMC FILTERING AND SPECTRA (continued)
NCS6S1203C NCS6S1205C
NCS6S1212C NCS6S1215C
NCS6S4803C NCS6S4805C
NCS6S4812C NCS6S4815C
0
10
20
30
40
50
60
70
80
90
100000 1000000 10000000 100000000
Frequency (Hz)
Conducted Emissions (dBuV)
0
10
20
30
40
50
60
70
80
90
100000 1000000 10000000 100000000
Frequency (Hz)
Conducted Emissions (dBuV)
0
10
20
30
40
50
60
70
80
90
100000 1000000 10000000 100000000
Frequency (Hz)
Conducted Emissions (dBuV)
0
10
20
30
40
50
60
70
80
90
100000 1000000 10000000 100000000
Frequency (Hz)
Conducted Emissions (dBuV)
0
10
20
30
40
50
60
70
80
90
100000 1000000 10000000 100000000
Frequency (Hz)
Conducted Emissions (dBuV)
0
10
20
30
40
50
60
70
80
90
100000 1000000 10000000 100000000
Frequency (Hz)
Conducted Emissions (dBuV)
0
10
20
30
40
50
60
70
80
90
100000 1000000 10000000 100000000
Frequency (Hz)
Conducted Emissions (dBuV)
0
10
20
30
40
50
60
70
80
90
100000 1000000 10000000 100000000
Frequency (Hz)
Conducted Emissions (dBuV)
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2011-05-19 KDC_NCS6C.D01 Page 10 of 10
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. Specifi cations are subject to change without
notice. © 2011 Murata Power Solutions, Inc.
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfi eld, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
www.murata-ps.com/locations
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS PIN CONNECTIONS
Pin Function
Single Dual
2-VIN -VIN
3-VIN -VIN
9 No pin OV
11 N/C -VOUT
14 +VOUT +VOUT
16 -VOUT OV
22 +VIN +VIN
23 +VIN +VIN
TUBE OUTLINE DIMENSIONS
RECOMMENDED FOOTPRINT DETAILS
*L5 option pin length 0.197 (5.00).
All dimensions in inches (mm) ±0.020 (0.5) except pin to pin tolerance ±0.010 (0.25).
All pins on a 0.100 (2.54) pitch and within 0.010 (0.25) of true position.
The copper case is connected to the output (-VOUT) pin. Care is needed in the design of this circuit board on which the converter is mounted.
Top side tracks must not contact the edge of the case on the underside of the unit.
Please note that from 2010 onwards, you may receive either a blue or a black case.
Weight: 17g
All dimensions in inches ±0.010 (± 0.25mm).
Tube length 20.47 (520))
All dimensions in inches ±0.010 (mm 0.25mm). Quantity: 15
0.02 (0.5)
0.787
(20.0)
1.26 (32.0)
XYYWW
NCS6S1205C
0.394 (10.0)
0.600
(15.24)
0.093
(2.36)
0.100 (2.54)
0.020 (0.50)
0.079 (2.0)
0.197 (5.0)
0.180 (4.57)
0.200 (5.08)
0.600 (15.24)
0.256
(6.50)
1416
2223
119
32
0.04±0.006 (1.00±0.15)
0.906 (23.0)
0.335 (8.5)
0.807 (20.5)
0.1 (2.54)
Ø
8 HOLES
1.0mm
0.1 (2.54)
