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PDF NCS12D4815C Data sheet ( Hoja de datos )

Número de pieza NCS12D4815C
Descripción Isolated 12W 4:1 Input Single & Dual Output DC/DC Converters
Fabricantes Murata 
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NCS12 Series
Isolated 12W 4:1 Input Single & Dual Output DC/DC Converters
FEATURES
„UL 60950 recognition pending
„4:1 Wide range voltage input
„Operating temperature range -40°C to 85°C
„Typical load regulation from 0.05%
„1.5kVDC Isolation ‘Hi Pot Test’
„3.3V, 5V, 12V & 15V outputs
„UL 94V-0 Package materials
„No electrolytic capacitors
„Thermal shutdown
„Under voltage lock out
„Current fold back
PRODUCT OVERVIEW
The NCS12 series of DC/DC converters offers
single & dual output voltages from input voltage
ranges of 9-36V and 18-75V. The NCS12 is
housed in an industry standard package with
a standard pinout. The NCS12 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.
For full details go to
www.murata-ps.com/rohs
SELECTION GUIDE
Order Code
NCS12S1203C
NCS12S1205C
NCS12S1212C
NCS12S1215C
NCS12S4803C
NCS12S4805C
NCS12S4812C
NCS12S4815C
NCS12D1205C
NCS12D1212C
NCS12D1215C
NCS12D4805C
NCS12D4812C
NCS12D4815C
Input
Voltage
Nom.
V
12
12
12
12
48
48
48
48
12
12
12
48
48
48
Output
Voltage
V
3.3
5
12
15
3.3
5
12
15
±5
±12
±15
±5
±12
±15
Output
Current
A
3.64
2.40
1.00
0.80
3.64
2.40
1.00
0.80
±1.2
±0.5
±0.4
±1.2
±0.5
±0.4
Load Regulation
Positive Negative Positive Negative
Output Output Output Output
Typical
Max
% %%
1 1.5
0.5 1
0.1 0.3
0.1 0.3
1.2 2
0.5 1
0.1 0.3
0.1 0.3
0.15 0.3 0.3
2
0.05 0.2 0.3 1.5
0.05 0.1 0.3 1.5
0.15 0.5 0.3
2
0.05 0.4 0.3 1.5
0.05 0.4 0.3 1.5
Efficiency MTTF1
Min. Typ.
% % Hrs
78 83.5 269,492
84 88 313,578
83 84.5 230,569
83 85.5 195,596
81 85.5 341,943
84 87.5 418,117
82 84.5 296,593
84 85 259,485
80 81.5 182,655
83 85 158,750
84 86 140,435
78 80 165,931
83 85 215,533
83 85 146,257
SELECTION GUIDE (Continued)
Order Code
NCS12S1203C
NCS12S1205C
NCS12S1212C
NCS12S1215C
NCS12S4803C
NCS12S4805C
NCS12S4812C
NCS12S4815C
NCS12D1205C
NCS12D1212C
NCS12D1215C
NCS12D4805C
NCS12D4812C
NCS12D4815C
10% Load
Typ. 12/48V
A
0.15
0.1
0.1
0.06
0.05
0.05
0.03
0.03
0.04
0.04
0.05
0.03
0.03
0.03
Input Current
10% Load
Typ. 24V
A
0.1
0.16
0.06
0.1
0.08
0.08
0.06
0.06
0.07
0.07
0.07
0.07
0.07
0.07
100% Load
Typ. 12/48V
A
1.2
1.1
1.2
1.2
0.3
0.3
0.3
0.3
1.25
1.2
1.5
0.3
0.3
0.4
Ripple and Noise
Typ.
mVp/p
60
50
80
100
100
90
75
90
35
40
55
70
84
55
Max
mVp/p
125
125
125
125
125
125
125
125
100
100
100
100
100
100
INPUT CHARACTERISTICS
Parameter
Conditions
Voltage range
12V input types
48V input types
Turn on threshold 12V input types
Under voltage lock out
Turn off threshold 12V input types
Turn on threshold 48V input types
Turn off threshold 48V input types
Power consumption at NCS12X12
shutdown
NCS12X48
Reflected ripple current
48V dual output types
All other types
Min. Typ.
9 24
18 48
8.5
7.5
16.7
15.8
10
100
15
10
1 Calculated using MIL-HDBK-217 FN2, parts stress method with nominal input voltage at full load.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
Max.
36
75
Units
V
V
mW
mA p-p
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KDC_NCS12C.B01 Page 1 of 14

1 page




NCS12D4815C pdf
NCS12 Series
Isolated 12W 4:1 Input Single & Dual Output DC/DC Converters
EFFICIENCY VS LOAD
NCS12S1203C
90
85
80
75
24V
70 12V
65
60
55
50
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Load (%)
NCS12S1205C
90
85
80
75
70
24V
65 12V
60
55
50
45
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Load (%)
NCS12S1212C
88
86
84
82
80
24V
78 12V
76
74
72
70
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Load (%)
NCS12S1215C
88
86
84
82
80
78 24V
12V
76
74
72
70
68
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Load (%)
NCS12S4803C
90
85
80
75 48V
24V
70
65
60
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Load (%)
NCS12S4805C
90
85
80
75
70
48V
65 24V
60
55
50
45
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Load (%)
NCS12S4812C
90
85
80
75 48V
24V
70
65
60
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Load (%)
NCS12S4815C
90
85
80
75 48V
24V
70
65
60
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Load (%)
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All enquiries: www.murata-ps.com/support
KDC_NCS12C.B01 Page 5 of 14

5 Page





NCS12D4815C arduino
NCS12 Series
Isolated 12W 4:1 Input Single & Dual 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 principle 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 electrostatic forms. The latter is suppressed by the metal case, which is connected to the output return, typically a zero-volt
point. 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 shows the input filter typically required to meet CISPR22 Quasi-PeakCurve B.
L1
C1 C2 C3
C1, C2 1μF Polyester or ceramic capacitor
C3 47μF Electrolytic capacitor
C4 & C5 10nF 250 VAC Y Rated (15nf SXX03 & SXX05)
L1 1μH Common-mode choke (Murata part number 51105C)
DC
DC
C5
C4
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