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FOR NEW DESIGNS S Isolated 25W W S Single Output DC/DC Converters
www.murata-ps.com
NOT RECOMMENDED NPH25S Series
Is
SELECTION GUID E
Order Code 1
Nominal Input
Voltage
Current Limit
MTTF 2
Recommended
Alternative
V
V
A
A (Min.) A (Max.)
%
kHrs
NPH25S2403EiC
NPH25S2403iC
24
24
3.4
3.4
7.3
7.3
7.5
7.5
11.0
11.0
81
81
334
334
UEI30-033-Q48N-C
UEI30-033-Q48N-C
FEATURES
? RoHS compliant
? High ef?ciency to 89%
? Power density up to 1.78W/cm 3
? UL94 V-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 60oC without
NPH25S2405EiC
NPH25S2405iC
NPH25S2412EiC
NPH25S2412iC
NPH25S2415EiC
NPH25S2415iC
NPH25S4803EiC
NPH25S4803iC
NPH25S4805EiC
NPH25S4805iC
NPH25S4812EiC
NPH25S4812iC
NPH25S4815EiC
NPH25S4815iC
24
24
24
24
24
24
48
48
48
48
48
48
48
48
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
5.0
5.0
2.1
2.1
1.7
1.7
7.3
7.3
5.0
5.0
2.1
2.1
1.7
1.7
5.0
5.0
2.5
2.5
2.0
2.0
Obsolete
7.5
7.5
5.0
5.0
2.5
2.5
2.0
2.0
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
84
84
86
86
87
87
83
83
85
85
88
88
89
89
290
290
291
291
290
290
369
369
366
366
368
368
366
366
UEI30-050-Q48N-C
UEI30-050-Q48N-C
UEI30-120-Q48N-C
UEI30-120-Q48N-C
UEI30-150-Q48N-C
UEI30-150-Q48N-C
UEI25-033-D48P-C
UEI25-033-D48P-C
UEI25-050-D48P-C
UEI25-050-D48P-C
UEI25-120-D48P-C
UEI25-120-D48P-C
Contact Murata
Contact Murata
heatsink
INPUT CHARACTERISTICS
? Operation to zero load
? Protected against load faults
Parameter
Voltage range
Conditions
Continuous operation, 24V input types
Continuous operation, 48V input types
Min.
18
36
Typ.
24
48
Max.
36
75
Units
V
? Internal over temperature protection
? Uses no electrolytic capacitors
DESCRIPTION
The NPH25S series of DC/DC converters combines
OUTPUT CHARACTERISTICS
Parameter
Voltage set point error
Overall voltage error
Conditions
50% load
Case temperature -40oC to 110oC
Load 0% - 100%, Input speci?ed range
Min.
Typ.
Max.
0.5
2.5
Units
%
%
ease of application with versatility. The pin pattern
is based on the popular industry standard, but two
Temperature coef?cient of
output voltage (slope)
250
ppmoC
additional pins may optionally be ?tted to provide
a variety of features not commonly found on units
of this type. High ef?ciency enables full rating to
be achieved in a small package without heat-
sinking, and a high surge capability will provide
Deviation of output voltage
Line regulation
Load Regulation
Ripple
Temperature MIN-MAX
Operating voltage range, 50% load
0% - 100% rated load
rms
0.5
70
1
0.1
0.5
%
%
mV
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 ef?cient heat transfer and
ISOLATION CHARACTERISTICS
Parameter Conditions
Isolation test voltage Flash tested for 1 second
Resistance VISO = 500VDC
Min.
1500
1
Typ.
Max.
Units
VDC
GΩ
screening. The product range has been recog-
nised by Underwriters Laboratory (UL) to UL 1950
ABSOLUTE MAXIMUM RATINGS
for operational insulation, ?le number E151252
applies.
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 ?tted.
For full details go to
www.murata-ps.com/rohs
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 speci?cations typical at T A =25°C, nominal input voltage and rated output current unless otherwise speci?ed.
www.murata-ps.com/support
KDC_NPH25S.H01 Page 1 of 8
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