NPH25S Series
www.murata-ps.com
Isolated 25W Single Output DC/DC Converters
SELECTION GUIDE
Nominal Input
Voltage
Current Limit
MTTF2
Recommended
Alternative
Order Code1
V
V
3.4
3.4
A
A (Min.) A (Max.)
%
81
81
84
84
86
86
87
87
kHrs
334
334
290
290
291
291
290
290
NPH25S2403EiC
NPH25S2403iC
NPH25S2405EiC
NPH25S2405iC
NPH25S2412EiC
NPH25S2412iC
NPH25S2415EiC
NPH25S2415iC
24
24
24
24
24
24
24
24
7.3
7.3
5.0
5.0
2.1
2.1
1.7
1.7
7.5
7.5
5.0
5.0
2.5
2.5
2.0
2.0
11.0
11.0
7.5
UEI30-033-Q48N-C
UEI30-033-Q48N-C
UEI30-050-Q48N-C
UEI30-050-Q48N-C
UEI30-120-Q48N-C
UEI30-120-Q48N-C
UEI30-150-Q48N-C
UEI30-150-Q48N-C
FEATURES
ꢀRoHS compliant
5.1
5.1
7.5
12.1
12.1
15.1
15.1
3.7
ꢀHigh efficiency to 89%
ꢀPower density up to 1.78W/cm3
ꢀUL94 V-0 package material
ꢀIndustry standard pinout
ꢀUL 1950 recognized
3.7
3.0
3.0
Obsolete
NPH25S4803EiC
NPH25S4803iC
NPH25S4805EiC
NPH25S4805iC
NPH25S4812EiC
NPH25S4812iC
NPH25S4815EiC
NPH25S4815iC
48
48
48
48
48
48
48
48
3.4
3.4
7.3
7.3
5.0
5.0
2.1
2.1
1.7
1.7
7.5
7.5
5.0
5.0
2.5
2.5
2.0
2.0
11.0
11.0
7.5
83
83
85
85
88
88
89
89
369
369
366
366
368
368
366
366
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
5.1
ꢀNon latching current limit
ꢀConstant 350kHz frequency
ꢀ1.5kV input to output isolation
ꢀVersatile control options
5.1
7.5
12.1
12.1
15.1
15.1
3.7
3.7
3.0
3.0
Contact Murata
ꢀContinuous rating to 30W at 60ºC without
heatsink
INPUT CHARACTERISTICS
Parameter
Conditions
Continuous operation, 24V input types
Continuous operation, 48V input types
Min.
18
36
Typ.
24
48
Max.
36
75
Units
V
ꢀOperation to zero load
Voltage range
ꢀProtected against load faults
ꢀInternal over temperature protection
ꢀUses no electrolytic capacitors
OUTPUT CHARACTERISTICS
Parameter
Voltage set point error
Conditions
50% load
Min.
Typ.
Max.
0.5
Units
%
DESCRIPTION
Case temperature -40ºC to 110ºC
Load 0% - 100%, Input specified range
Overall voltage error
2.5
%
The NPH25S 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.
Temperature coefficient of
output voltage (slope)
250
ppmºC
%
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
ISOLATION CHARACTERISTICS
Parameter
Isolation test voltage
Resistance
Conditions
Flash tested for 1 second
VISO = 500VDC
Min.
1500
1
Typ.
Max.
Units
VDC
GΩ
ABSOLUTE MAXIMUM RATINGS
Input voltage, 24V input types
Input voltage, 48V input types
Output voltage
-0.5V to 40V3
-0.5V to 80V3
-0.3V to regulated voltage
-1V to +30V
Output trim control
Synchronisation/shutdown control
15V relative to input return
1. Parts ending with EiC have optional TRIM and SS pins fitted.
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 specifications typical at T =25°C, nominal input voltage and rated output current unless otherwise specified.
A
www.murata-ps.com/support
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