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PDF NPH15S2405iC Data sheet ( Hoja de datos )

Número de pieza NPH15S2405iC
Descripción Isolated 15W Single Output DC/DC Converters
Fabricantes Murata 
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www.murata-ps.com
NPH15S Series
Isolated 15W Single Output DC/DC Converters
FEATURES
„ RoHS compliant
„ High efficiency to 89%
„ Power density up to 2.4W/cm3
„ UL 94V-0 package material
„ Industry standard pinout
„ UL 1950 recognized
„ Non latching current limit
„ Constant 350kHz frequency
„ 1.5kV input to output isolation
„ Versatile control options
„ Continuous rating to 30W at 40ºC without
heatsink
„ Operation to zero load
„ Protected against load faults
„ Internal over temperature protection
„ Uses no electrolytic capacitors
DESCRIPTION
The NPH15S series of DC/DC converters combines
ease of application with versatility. The pin pattern
is based on the popular industry standard, but two
additional pins may optionally be fitted to provide
a variety of features not commonly found on units
of this type. High efficiency enables full rating to
be achieved in a small package without heat-
sinking, and a high surge capability will provide
for start-up and transient loads, whilst being
thermally protected against sustained overload.
Overload protection of the “constant current” type
ensures start-up into complex load conditions. The
copper case achieves efficient heat transfer and
screening. The product range has been recog-
nised by Underwriters Laboratory (UL) to UL 1950
for operational insulation, file number E151252
applies.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
SELECTION GUIDE
Order Code1
Nominal Input
Voltage
V
NPH15S2403EiC
24
NPH15S2403iC
24
NPH15S2405EiC
24
NPH15S2405iC
24
NPH15S2412EiC
24
NPH15S2412iC
24
NPH15S2415EiC
24
NPH15S2415iC
24
NPH15S4803EiC
48
NPH15S4803iC
48
NPH15S4805EiC
48
NPH15S4805iC
48
NPH15S4812EiC
48
NPH15S4812iC
48
NPH15S4815EiC
48
NPH15S4815iC
48
Output
Voltage
V
3.4
3.4
5.1
5.1
12.1
12.1
15.1
15.1
3.4
3.4
5.1
5.1
12.1
12.1
15.1
15.1
Output
Current
A
4.4
4.4
3.0
3.0
1.3
1.3
1.0
1.0
4.4
4.4
3.0
3.0
1.3
1.3
1.0
1.0
Current Limit
Efficiency
A (Min.)
7.5
7.5
5.0
5.0
2.5
2.5
2.0
2.0
7.5
7.5
5.0
5.0
2.5
2.5
2.0
2.0
A (Max.)
11.0
11.0
7.5
7.5
3.7
3.7
3.0
3.0
11.0
11.0
7.5
7.5
3.7
3.7
3.0
3.0
%
81
81
84
84
86
86
87
87
83
83
85
85
88
88
89
89
MTTF2
kHrs
335
335
286
286
286
286
281
281
295
295
301
301
302
302
296
296
INPUT CHARACTERISTICS
Parameter
Conditions
Voltage range
Continuous operation, 24V input types
Continuous operation, 48V input types
Min. Typ. Max. Units
18 24 36
36 48 75
V
OUTPUT CHARACTERISTICS
Parameter
Conditions
Voltage set point error
50% load
Overall voltage error
Case temperature -40ºC to 110ºC
Load 0% - 100%
Input specified range
Temperature coefficient
of output voltage (slope)
Deviation of output
voltage
Temperature MIN-MAX
Line regulation
Load Regulation
Ripple
Operating voltage range, 50% load
0% - 100% rated load
rms
Min. Typ. Max. Units
0.5 %
2.5 %
250 ppmºC
0.5 1
%
0.1 %
0.5 %
70 mV
ISOLATION CHARACTERISTICS
Parameter
Conditions
Isolation test voltage
Flash tested for 1 second
Resistance
VISO = 500VDC
Min. Typ. Max. Units
1500 VDC
1 GΩ
ABSOLUTE MAXIMUM RATINGS
Input voltage, 24V input types
Input voltage, 48V input types
Output voltage
Output trim control
Synchronisation/shutdown control
-0.5V to 40V 3
-0.5V to 80V 3
-0.3V to regulated voltage
-1V to +30V
±15V relative to input return
1. Parts ending with EiC have optional TRIM and SS pins fitted.
2. Calculated using MIL-HDBK-217F with nominal input voltage at full load.
3. Absolute maximum value for 30 seconds. Prolonged operation may damage the product.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
KDC_NPH15S.F05 Page 1 of 8

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NPH15S2405iC pdf
NPH15S Series
Isolated 15W 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 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 a capacitor 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
-
$ $
N)
"
-
O' 7"$:SBUFE
%$
$
%$
O' 7"$:SBUFE
-
NPH15S2403
C1
10μF 100V
C2
2.2μF 63V
C3
47μF 63V
Component reference
C4 L1
10μF 25V
NPH15S2405
10μF 100V
2.2μF 63V
47μF 63V
10μF 25V
NPH15S2412
10μF 100V
2.2μF 63V
Not required
10μF 25V
NPH15S2415
10μF 100V
2.2μF 63V
47μF 63V
10μF 25V
NPH15S4803
10μF 100V
Not required
Not required
10μF 25V
NPH15S4805
10μF 100V
Not required
Not required
10μF 25V
NPH15S4812
10μF 100V
Not required
Not required
10μF 25V
NPH15S4815
10μF 100V
Not required
Not required
C1, C2 & C4 : Electrolytic capacitors
C3 : Polyester or ceramic capacitor
EMC Spectra red limit line is EN 55022 curve B Quasi-peak average limit.
10μF 25V
$
L2
MPS 18R333C
33μH 2A
MPS 18R333C
33μH 2A
MPS 18R333C
33μH 2A
MPS 18R333C
33μH 2A
MPS 18R104C
100μH 1.2A
MPS 18R104C
100μH 1.2A
MPS 18R104C
100μH 1.2A
MPS 18R104C
100μH 1.2A
L3
MPS 18R472C
4.7μH 5.35A
MPS 18R103C
10μH 3.45A
MPS 18R333C
33μH 2.00A
MPS 18R333C
33μH 2.00A
MPS 18R472C
4.7μH 5.35A
MPS 18R103C
10μH 3.45A
MPS 18R333C
33μH 2.00A
MPS 18R333C
33μH 2.00A
www.murata-ps.com/support
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