Murata NCS3S4815SC Isolated 3w 4:1 input single output dc/dc converter Datasheet

NCS3 Series
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Isolated 3W 4:1 Input Single Output DC/DC Converters
Efficiency
12V or 48V
Input.
Nom.
V
V
%
mA
mA
mA
Min. Typ. Min. Typ. Typ. Max.
%
%
%
% mVp/p mVp/p kHrs
12
12
12
12
48
48
48
48
3.3
5
12
15
3.3
5
12
15
10
5
0
0
10
5
0
0
250
305
300
300
124
153
150
149
125
150
150
150
65
80
80
80
700
600
250
200
700
600
250
200
74
79
81
82
70
77.5
77
78
Input
Voltage
Output
Voltage
Minimum
Load
Order Code
Output
Current
SELECTION GUIDE
„
UL 60950 recognised
NCS3S1203SC
NCS3S1205SC
NCS3S1212SC
NCS3S1215SC
NCS3S4803SC
NCS3S4805SC
NCS3S4812SC
NCS3S4815SC
„
4:1 Wide range voltage input
INPUT CHARACTERISTICS
„
Operating temperature range -40°C to 85°C
with derating
Parameter
FEATURES
Voltage range
„
No electrolytic capacitors
„
Continuous short circuit protection
73
79
80
81
74
79
80
81
Typ.
Max.
12
36
48V input types
18
48
75
NCS3S48XX
12V input types
PRODUCT OVERVIEW
The NCS3 series of DC/DC converters offers a
single output voltage from input voltage ranges
of 9-36V and 18-75V. The NCS3 is housed in an
industry standard package with a standard pinout.
OUTPUT CHARACTERISTICS
Transient response
1335
1081
1272
1617
1327
1117
1211
1574
Units
V
5.5
24V input types
2
24V input types
3.5
48V input types
2
Power consumption at shutdown
Voltage set point accuracy
Line regulation
Load regulation
55
60
55
50
55
75
65
55
9
NCS3S12XX
Rated power
32
34
28
20
22
36
31
22
Min.
Input reflected ripple
current
Parameter
76
81
83
85
77
81
83
83
Ripple and
MTTF1
Noise
12V input types
Input current in shutdown
Applications include telecommunications, battery
powered systems, process control and distributed
power systems.
Efficiency
24V Input.
77
82
84
86
74
80
81
81
Conditions
„
1.5 kVDC Isolation ‘Hi Pot Test’
„
3.3V, 5V, 12V & 15V outputs
Rated Input Rated
Current
Input
12V or 48V Current
Input. 24V Input.
mA p-p
2
mW
2.5
Conditions
Min.
3.3V output types
All other output types
All output types
Low line to high line
All output types
Peak deviation (12.5-37.5% & 37.5-12.5% swing)
Settling time
(within 5% Vout Nom.)
Typ.
±1
Max.
2.31
3
±2
±0.5
±1
5
1.5
mA
Units
W
%
%
%
%Vout
ms
GENERAL CHARACTERISTICS
Parameter
Conditions
CTRL input current
Please refer to control pin application note
Min.
Typ.
2
Max.
Units
8
mA
Max.
Units
ISOLATION CHARACTERISTICS
Parameter
Conditions
Min.
Isolation test voltage
Flash tested for 1 minute
NCS3S12XXSC
NCS3S48XXSC
Viso = 1kVDC
1500
Isolation Capacitance
Resistance
Typ.
VDC
180
185
pF
1
GΩ
TEMPERATURE CHARACTERISTICS
Parameter
Conditions
Min.
Operation
See derating graphs
-40
85
-50
115
Storage
Case temperature rise above
ambient
100% Load, Nom VIN, Still Air
Typ.
30
Max.
Units
°C
40
1 Calculated using MIL-HDBK-217 FN2, parts stress method with nominal input voltage at full load.
For full details go to
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All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
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KDC_NCS3_B01 Page 1 of 10
NCS3 Series
Isolated 3W 4:1 Input Single Output DC/DC Converters
ABSOLUTE MAXIMUM RATINGS
Short-circuit protection (for SELV input voltages)
Control pin input current
Lead temperature 1.0mm from case for 10 seconds (to JEDEC JESD22-B106 ISS C)
Input voltage, NCS3 12V input types
Input voltage, NCS3 24V input types
Continuous
8mA
260°C
40V
80V
SWITCHING FREQUENCY
Parameter
Conditions
12V input types
NCS3S1203SC
24V input types
12V input types
NCS3S1205SC
24V input types
12V input types
NCS3S1212SC
24V input types
12V input types
NCS3S1215SC
24V input types
24V input types
NCS3S4803SC
48V input types
24V input types
NCS3S4805SC
48V input types
24V input types
NCS3S4812SC
48V input types
24V input types
NCS3S4815SC
48V input types
Min.
10% Load
100% Load
10% Load
100% Load
10% Load
100% Load
10% Load
100% Load
10% Load
100% Load
10% Load
100% Load
10% Load
100% Load
10% Load
100% Load
10% Load
100% Load
10% Load
100% Load
10% Load
100% Load
10% Load
100% Load
10% Load
100% Load
10% Load
100% Load
10% Load
100% Load
10% Load
100% Load
Typ.
1200
280
1620
460
1200
270
1690
490
1220
310
1680
570
1130
310
1580
570
1020
270
1440
450
1190
260
1590
470
1180
1570
310
560
1180
330
1590
610
Max.
Units
kHz
kHz
kHz
kHz
kHz
kHz
kHz
kHz
APPLICATION NOTES
Recommended Input Capacitor and Maximum Output Capacitance
A 10 μF output capacitor is recommended for stability under all operating conditions. Maximum output capacitance should not exceed:
Output Voltage
MaximumLoad Capacitance
V
μF
3.3
470
5
470
12
220
15
110
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KDC_NCS3_B01 Page 2 of 10
NCS3 Series
Isolated 3W 4:1 Input Single Output DC/DC Converters
APPLICATION NOTES CONTINUED
Start-up times
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 the maximum output capacitance with increased start times.
Start-up times
ms
0.7
1
2.2
2.3
1.2
1.1
1.9
2.8
Part No.
NCS3S1203SC
NCS3S1205SC
NCS3S1212SC
NCS3S1215SC
NCS3S4803SC
NCS3S4805SC
NCS3S4812SC
NCS3S4815SC
Typical Start-Up Wave Form
Control Pin
The NCS3S converters have a shutdown feature which enables the user to disable the converter into a low power state. The control pin connects to the base of an internal
NPN transistor through a 1K resistor with the converter shut down when the transistor is turned on by an external applied voltage. The converter can also be shut down
using a 5V TTL signal (the unit is OFF for logic High and ON for logic LOW). If the control pin is left open (high impedance), the converter will run normally. A suitable
application circuit is shown below.
NCS3
D1 (e.g. 1N4001) is necessary for correct operation of the NCS3 when the control
signal is LOW. The recommended drive current IB to shut down the NCS3 is 2 mA to
8 mA. The value of RC can be derived as follows:
+VIN
RC =
VC or
TTL
Rc
D1
CONTROL
Rin
1K
-VIN
VC - VD1 - 0.6 - (1B x RIN )
IB
Note: RIN is a 125mW resistor
For a switch input:
Calculate the value of Rc from the above equation given switch voltage Vc and
chosen current between 2 and 8 mA.
For 5V TTL Signal:
Set Rc to be 680Ω or less.
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.
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KDC_NCS3_B01 Page 3 of 10
NCS3 Series
Isolated 3W 4:1 Input Single 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 specifi ed time, across a component designed to provide electrical isolation, to verify the integrity of that isolation.
Murata Power Solutions NCS3 series of DC/DC converters are all 100% production tested at their stated isolation voltage. This is 1.5kVDC for 60 seconds.
A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?”
The NCS3 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 NCS3 series has a toroid 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.
SAFETY APPROVAL
The NCS3 series has been recognized by Underwriters Laboratory (UL) to UL 60950 for functional insulation, file number E151252 applies. The NCS3 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.
NCS3S12XXSC: 0.75A
NCS3S48XXSC: 0.50A
All fuses should be UL approved and rated to at least the maximum allowable DC input voltage.
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
C2
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
DC/DC Converter
OSCILLOSCOPE
C1 C2 C3
+
SUPPLY
Input
-
+
R1
T1
R2
Y INPUT
Output
-
R LOAD
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KDC_NCS3_B01 Page 4 of 10
NCS3 Series
Isolated 3W 4:1 Input Single Output DC/DC Converters
EFFICIENCY VS LOAD
NCS3S1205SC
90
90
80
80
70
70
60
60
Efficiency (%)
Efficiency (%)
NCS3S1203SC
50
9V
40
12V
24V
30
50
9V
40
12V
24V
30
36V
20
20
10
10
36V
0
0
0
10
20
30
40
50
60
70
80
90
0
100
10
20
30
40
NCS3S1212SC
60
90
90
80
80
70
70
60
60
50
9V
40
12V
24V
30
90
100
9V
40
12V
24V
30
36V
20
20
10
10
0
0
0
10
20
30
40
50
60
70
80
90
0
100
10
20
30
40
50
60
70
80
90
100
Load (%)
Load (%)
NCS3S4803SC
NCS3S4805SC
90
90
80
80
70
70
60
60
Efficiency (%)
Efficiency (%)
80
50
36V
50
18V
40
24V
Jock
48V
30
50
18V
40
24 V
48 V
30
75 V
75V
20
20
10
10
0
0
0
10
20
30
40
50
60
70
80
90
100
0
10
20
30
40
Load (%)
50
60
70
80
90
100
80
90
100
Load (%)
NCS3S4812SC
NCS3S4815SC
90
90
80
80
70
70
60
60
Efficiency (%)
Efficiency (%)
70
NCS3S1215SC
Efficiency (%)
Efficiency (%)
50
Load (%)
Load (%)
50
18Vin
40
24 Vin
48 Vin
30
50
18V
40
24 V
48 V
30
75 V
75 Vin
20
20
10
10
0
0
0
10
20
30
40
50
Load (%)
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60
70
80
90
100
0
10
20
30
40
50
60
70
Load (%)
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KDC_NCS3_B01 Page 5 of 10
NCS3 Series
Isolated 3W 4:1 Input Single Output DC/DC Converters
TEMPERATURE DERATING
NCS3S1203SC
NCS3S1205SC
3.00
3.00
9V
2.50
2.50
12V
9V
36V
2.00
24V
Power ( W)
Power ( W)
24V
12V
2.00
36V
1.50
1.50
1.00
1.00
0.50
0.50
0.00
0.00
60
65
70
75
80
85
90
95
60
100
65
70
75
80
85
90
95
100
Temperature (oC)
Temperature (oC)
NCS3S1212SC
NCS3S1215SC
3.00
3.00
2.50
2.50
9V
12V
2.00
24V
Power ( W)
Power ( W)
2.00
36V
1.50
1.50
9V
12V
1.00
1.00
24V
36V
0.50
0.50
0.00
60
65
70
75
80
85
90
95
0.00
100
60
65
70
75
80
Temperature (oC)
85
90
95
NCS3S4803SC
NCS3S4805SC
3.00
2.50
2.50
18V
2.00
24V
18V
48V
24V
2.00
Power ( W)
75V
Power ( W)
100
Temperature (oC)
1.50
48V
75V
1.50
1.00
1.00
Jock
0.50
0.50
0.00
0.00
50
55
60
65
70
75
80
85
90
95
50
100
55
60
65
70
75
80
85
90
95
100
Temperature (oC)
Temperature (oC)
NCS3S4812SC
NCS3S4815SC
3.00
3.00
18V
2.50
2.50
24V
48V
75V
2.00
Power ( W)
Power ( W)
2.00
1.50
18V
24V
1.50
48V
75V
1.00
1.00
0.50
0.50
0.00
0.00
50
55
60
65
70
75
80
Temperature (oC)
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85
90
95
100
50
55
60
65
70
75
80
85
90
95
100
Temperature (oC)
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KDC_NCS3_B01 Page 6 of 10
NCS3 Series
Isolated 3W 4:1 Input Single Output DC/DC Converters
EMC FILTERING AND SPECTRA
FILTERING
The module includes a basic level of filtering, sufficient for many applications. Where lower noise levels are desired, filters can easily be added to achieve any required
noise performance.
A DC/DC converter generates noise in two principal forms: that which is radiated from its body and that conducted on its external connections. There are three separate
modes of conducted noise: input differential, output differential and input-output.
This last appears as common mode at the input and the output, and cannot therefore be removed by filtering at the input or output alone. The first level of filtering is to
connect capacitors between input and output returns, to reduce this form of noise. It typically contains high harmonics of the switching frequency, which tend to appear
as spikes on surrounding circuits. The voltage rating of this capacitor must match the required isolation voltage. (Due to the great variety in isolation voltage and required
noise performance, this capacitor has not been included within the converter.)
Input ripple is a voltage developed across the internal Input decoupling capacitor. It is therefore measured with a defined supply source impedance. Although simple
series inductance will provide filtering, on its own it can degrade the stability. A shunt capacitor is therefore recommended across the converter input terminals, so that it
is fed from a low impedance.
If no filtering is required, the inductance of long supply wiring could also cause a problem, requiring an input decoupling capacitor for stability. An electrolytic will perform
well in these situations. The input-output filtering is performed by the common-mode choke on the primary. This could be placed on the output, but would then degrade
the regulation and produce less benefit for a given size, cost, and power loss.
Radiated noise is present in magnetic and electric forms. Thanks to the small size of these units, neither form of noise will be radiated “efficiently”, so will not normally
cause a problem. Any question of this kind usually better repays attention to conducted signals.
EMC FILTER AND VALUES TO OBTAIN SPECTRA AS SHOWN
The following filter circuit and filter table shows the input filters typically required to meet EN55022 Quasi-Peak Curve A or B.
L1
DC
C1 Polyester or Ceramic capacitor
TO MEET CURVE A
Part Number
NCS3S1203SC
NCS3S1205SC
NCS3S1212SC
NCS3S1215SC
NCS3S4803SC
NCS3S4805SC
NCS3S4812SC
NCS3S4815SC
C1
DC
TO MEET CURVE B
C1
2.2μF
2.2μF
1.5μF
1.5μF
4.7μF
4.7μF
4.7μF
4.7μF
L1
3.3μH
3.3μH
3.3μH
3.3μH
3.3μH
3.3μH
3.3μH
3.3μH
Part Number
NCS3S1203SC
NCS3S1205SC
NCS3S1212SC
NCS3S1215SC
NCS3S4803SC
NCS3S4805SC
NCS3S4812SC
NCS3S4815SC
C1
4.7μF
4.7μF
4.7μF
4.7μF
9.4μF
9.4μF
9.4μF
9.4μF
L1
15μH
10μH
10μH
10μH
50μH
50μH
50μH
50μH
The following typcial spectra are shown for class A and class B respectively with quasi peak and mean value limits.
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KDC_NCS3_B01 Page 7 of 10
NCS3 Series
Isolated 3W 4:1 Input Single Output DC/DC Converters
EMC FILTERING AND SPECTRA CONTINUED
NCS3S1203SC
80
80
70
60
60
50
50
dBuV
dBuV
70
40
40
30
30
20
20
10
10
0
1.00E+05
0
1.00E+05
1.00E+06
1.00E+07
1.00E+06
1.00E+07
1.00E+08
1.00E+08
Frequency (Hz)
Frequency (Hz)
80
80
70
70
60
60
50
50
dBuV
dBuV
NCS3S1205SC
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)
1.00E+06
1.00E+07
1.00E+08
Frequency (Hz)
80
80
70
70
60
60
50
50
dBuV
dBuV
NCS3S1212SC
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)
1.00E+06
1.00E+07
1.00E+08
Frequency (Hz)
80
80
70
70
60
60
50
50
dBuV
dBuV
NCS3S1215SC
40
40
30
30
20
20
10
10
0
1.00E+05
1.00E+06
1.00E+07
Frequency (Hz)
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1.00E+08
0
1.00E+05
1.00E+06
1.00E+07
1.00E+08
Frequency (Hz)
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KDC_NCS3_B01 Page 8 of 10
NCS3 Series
Isolated 3W 4:1 Input Single Output DC/DC Converters
EMC FILTERING AND SPECTRA CONTINUED
80
80
70
70
60
60
50
50
dBuV
dBuV
NCS3S4803SC
40
30
30
20
20
10
0
1.00E+05
40
10
1.00E+06
1.00E+07
0
1.00E+05
1.00E+08
Frequency (Hz)
1.00E+06
1.00E+07
1.00E+08
Frequency (Hz)
80
80
70
70
60
60
50
50
dBuV
dBuV
NCS3S4805SC
40
30
30
20
20
10
0
1.00E+05
40
10
1.00E+06
1.00E+07
0
1.00E+05
1.00E+08
Frequency (Hz)
1.00E+06
1.00E+07
1.00E+08
Frequency (Hz)
80
80
70
70
60
60
50
50
dBuV
dBuV
NCS3S4812SC
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
1.00E+06
1.00E+07
1.00E+08
Frequency (Hz)
Frequency (Hz)
80
80
70
70
60
60
50
50
dBuV
dBuV
NCS3S4815SC
40
30
30
20
20
10
0
1.00E+05
40
10
1.00E+06
1.00E+07
Frequency (Hz)
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1.00E+08
0
1.00E+05
1.00E+06
1.00E+07
1.00E+08
Frequency (Hz)
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KDC_NCS3_B01 Page 9 of 10
NCS3 Series
Isolated 3W 4:1 Input Single Output DC/DC Converters
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
PIN CONNECTIONS
21.95 [0.864] MAX
Pin
Function
Single
1
2
3
6
7
8
-VIN
+VIN
Control
+VOUT
0V
N/C
9.45 [0.372] MAX
TUBE OUTLINE DIMENSIONS
11.25 [0.443] MAX
1
2
3
6
7
8
0.40 [0.016] MIN
4.10±0.50
[0.161±0.020]
0.50±0.05
[0.020±0.002]
2.54 [0.100]
17.78 [0.700]
œ
œ
2.87
2.13
0.084 ]
[0.113
Tube Quantity : 23
RECOMMENDED FOOTPRINT DETAILS
0.25±0.05 [0 .010±0.002]
2.60
1.67
All dimensions in inches ±0.01 (mm ±0.5mm).
Tube length : 20.47±0.079 (520mm ±2mm).
0.066 ]
[0.102
2.54 [0.100]
x6 HOLES
[
0.045
Ø 1.15
1.00 Ø 0.039
]
0.1
2.54 [0.100]
All dimensions in millimetres (inches) ± 0.5 (0.020) except pin to pin tolerance ±0.25 (0.010).
All pins on a 2.54 (0.100) pitch and within 0.25 (0.010) of true position.
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
www.murata-ps.com/support
Weight: 4.4g
All dimensions in mm (inches) ±0.25 (± 0.010).
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: http://www.murata-ps.com/requirements/
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.
© 2015 Murata Power Solutions, Inc.
All enquiries: www.murata-ps.com/support
KDC_NCS3_B01 Page 10 of 10
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