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NCS6 Series
Isolated 6W 4:1 Input Single Output DC/DC Converters
SELECTION GUIDE
Input Voltage Order Code Nom. V
NCS6S1203C NCS6S1205C NCS6S1212C NCS6S1215C NCS6S4803C NCS6S4805C NCS6S4812C NCS6S4815C 12 12 12 12 48 48 48 48
Output Voltage V
3.3 5 12 15 3.3 5 12 15
Output Current 100% Load A
1.52 1.2 0.5 0.4 1.52 1.2 0.5 0.4
Input Current Ripple & Current Noise 0% 100% (Typ.) Load Load mA mA mV p-p
10 7 10 12 10 6 7 7 550 610 580 580 150 160 150 150 30 30 30 30 40 30 30 30
Efficiency MTTF1 Min. %
75 79 84 85 73 78 82 83
Typ. %
78 82 86 87 76 80 84 84
Hrs
662,073 521,975 435,567 437,582 483,460 441,850 408,555 416,319
FEATURES
RoHS compliant 4:1 Wide range voltage input Operating temperature range -40C to 85C Typical load regulation from 0.06% 1.5kVDC Isolation Typical efficiency 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
INPUT CHARACTERISTICS
Parameter
Voltage range
Conditions
All NCS6S12 types All NCS6S48 types Turn on threshold NCS6S12 Turn off threshold NCS6S12 Turn on threshold NCS6S48 Turn off threshold NCS6S48 All NCS6S12 types All NCS6S48 types
Min.
9 18
Typ.
12 48 8.5 7.5 16.7 15.8 12 9
Max.
36 75
Units
V
Under voltage lock out
V
Reflected ripple current
mA p-p
OUTPUT CHARACTERISTICS
Parameter
Rated power Voltage set point accuracy Line regulation
Conditions
5V, 12V & 15V output types 3.3V output types Low line to high line 10% total load to 100% total load
NCS6Sxx03C NCS6Sxx05C NCS6Sxx12C, NCS6Sxx15C
Min.
Typ.
Max.
6 5 2 0.2 0.6 0.5 0.2
Units
W % % %
PRODUCT OVERVIEW
The NCS6 series of DC/DC converters offers single 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.
Load Regulation
Start-up Time
3.3V & 5V output types 12V output types 15V output types
0.002 0.5 0.3 0.06 2.5 4.6 5.5
mS
ISOLATION CHARACTERISTICS
Parameter
Isolation test voltage Resistance Capacitance
Conditions
Flash tested for 1 seconds Viso = 1kVDC
Min.
1500 1
Typ.
Max.
Units
VDC G pF
225
ABSOLUTE MAXIMUM RATINGS
Short-circuit protection (for SELV input voltages) Internal power dissipation Lead temperature 1.0mm from case for 10 seconds (to JEDEC JESD22-B106 ISS C) Minimum output load for specification (see application notes) Input voltage, NCS6 12V input types Input voltage, NCS6 48V input types
For full details go to www.murata-ps.com/rohs
Continuous 2.1W 260C 10% of rated load 40V 80V
1 Calculated using MIL-HDBK-217F FN2, parts stress method with nominal input voltage at full load. All specifications typical at TA=25C, nominal input voltage and rated output current unless otherwise specified.
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2009-09-21
KDC_NCS6C.B01 Page 1 of 6
NCS6 Series
Isolated 6W 4:1 Input Single Output DC/DC Converters
GENERAL CHARACTERISTICS1
Parameter
Switching frequency
Conditions
Min.
Typ.
180
Max.
Units
kHz
TEMPERATURE CHARACTERISTICS
Parameter
Operation Storage 3.3V 5V 12V 15V
Conditions
Min.
-40 -50
Typ.
Max.
85 125
Units
Case temperature rise above ambient
100% Load, Nom VIN, Still Air,
Thermal shutdown
Case Temperature
32 32 28 26 110
C
APPLICATION NOTES
Output Capacitors
The NCS6 series does not require output capacitors to meet datasheet specification. To meet datasheet specification, output capacitance should not exceed: Output Voltage (V) 3.3 5 12 15 Output Capacitance (F) 470 470 220 220
Minimum Load
The minimum load to meet full datasheet specification is 10% of the full rated load across the specified input voltage range. Between 0% and 10% output loading, the output voltage will remain within data sheet specification however, output ripple and noise will increase but will still be below 50mV p-p.
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 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?" For a part holding no specific agency approvals, such as the NCS6 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 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 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.
www.murata-ps.com
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
2009-09-21
KDC_NCS6C.B01 Page 2 of 6
NCS6 Series
Isolated 6W 4:1 Input Single Output DC/DC Converters
RoHS COMPLIANCE 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 this product series is a Gold flash (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 configuration.
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.
C1
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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2009-09-21
KDC_NCS6C.B01 Page 3 of 6
NCS6 Series
Isolated 6W 4:1 Input Single Output DC/DC Converters
EFFICIENCY VS LOAD NCS6S1203C
81 80 79 Efficiency (%) 78 77 76 75 74 73 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Efficiency (%)
NCS6S1205C
90 80 70
24V 12V
60 50 40 30 20 10 0 10% 20%
12V
24V
30%
40%
50%
60%
70%
80%
90%
100%
Load (%)
Load (%)
NCS6S1212C
90 80 70 Efficiency (%)
NCS6S1215C
90 80 70
50 40 30 20 10 0 10%
12V
Efficiency (%)
60
24V
60 50 40 30 20 10
12V
24V
20%
30%
40%
50%
60%
70%
80%
90%
100%
0
10%
20%
30%
40%
Load (%)
50% 60% Load (%)
70%
80%
90%
100%
NCS6S4803C
90 80 70 Efficiency (%) 60 50 40 30 20 10 0 10% 20% 30% 40% 50% 60% Load (%) 70% 80% 90% 100%
NCS6S4805C
90 80 70 Efficiency (%) 60 50 40 30 20 10 0 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 110% Load (%)
24V
48V
24V
48V
NCS6S4812C
90 80 70 Efficiency (%) 60 50 40 30 20 10 0 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 110% Load (%)
NCS6S4815C
100 90 80 Efficiency (%) 70
24V
48V
60 50 40 30 20 10 0
24V
48V
10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 110% Load (%)
www.murata-ps.com
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
2009-09-21
KDC_NCS6C.B01 Page 4 of 6
NCS6 Series
Isolated 6W 4:1 Input Single Output DC/DC Converters
TEMPERATURE DERATING NCS6S1203C
6 5 Output Power (W) 4
Output Power (W)
NCS6S1205C
7 6 5 4 3 2 1
400 lfm 200 lfm 100 lfm still air
3 2 1
400 lfm 200 lfm 100 lfm still air
0
-40 -30 -20 -10 0
10
20
30
40
50
60
70
80
0 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 Ambient Temperature (C)
Ambient Temperature (C)
NCS6S1212C
7 6
NCS6S1215C
7 6 Output Power (W)
Output Power (W)
5 4 3 2
400 lfm 200 lfm 100 lfm still air
5 4 3 2
400 lfm
200 lfm 100 lfm
still air
1 0 -40 -30 -20 -10 0
1 0 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 Ambient Temperature (C)
10
20
30
40
50
60
70
80
Ambient Temperature (C)
NCS6S4803C
6 5 Output Power (W) 4 3 2
NCS6S4805C
7 6
400 lfm 200 lfm 100 lfm
Output Power (W)
5 4 3 2 1 0
400 lfm 200 lfm 100 lfm still air
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80
still air
1 0 -40 -30 -20 -10 0
10
20
30
40
50
60
70
80
Ambient Temperature (C)
Ambient Temperature (C)
NCS6S4812C
7 6 Output Power (W)
NCS6S4815C
7 6
200 lfm
100 lfm
Output Power (W)
5 4 3 2 1 0
400 lfm
5 4 3 2
400 lfm 200 lfm 100 lfm still air
still air
1 0 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 Ambient Temperature (C)
-40 -30 -20 -10 0
10
20
30
40
50
60
70
80
Ambient Temperature (C)
www.murata-ps.com
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
2009-09-21
KDC_NCS6C.B01 Page 5 of 6
NCS6 Series
Isolated 6W 4:1 Input Single Output DC/DC Converters
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS PIN CONNECTIONS Pin
0.787 (20.0)
Function Single
-VIN -VIN N/C +VOUT -VOUT +VIN +VIN
NCS6S0505C
XYYWW
1.26 (32.0)
2 3 11 14 16 22 23
TUBE OUTLINE DIMENSIONS
0.040.006 (1.000.15)
0.394 (10.0)
0.256 (6.50) 0.020 (0.50)
0.02 (0.5)
0.335 (8.5)
0.600 (15.24)
0.807 (20.5)
0.200 (5.08) 0.093 (2.36)
Tube length 20.47 (520)) All dimensions in inches 0.010 (mm 0.25mm).
Quantity: 15
2
3
11
RECOMMENDED FOOTPRINT DETAILS
0.600 (15.24)
7 HOLES 1.0mm O
23
22
16
14
0.1 (2.54)
0.100 (2.54)
0.180 (4.57)
Weight: 17g 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.
0.1 (2.54)
All dimensions in inches 0.010 ( 0.25mm).
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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Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
2009-09-21
KDC_NCS6C.B01 Page 6 of 6
0.906 (23.0)

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