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OBSOLE
TE NPX20 Series
Isolated 20W Single Output DC/DC Converters
SELECTION GUIDE
Order Code
Input Voltage Output Output Output Power Ef?ciency
(Nom.) Voltage Current Max. Min.
V V A W %
Package
Style
Recommended
Alternatives
(click for data sheet)
NPX20S24018DC 1
24 1.8 6.0 10.8 76 3
NPX20S24018MC
NPX20S24018PMC
NPX20S24025DC 1
NPX20S24025MC
NPX20S24025PMC
NPX20S24033DC 1
24 1.8 6.0 10.8 76 1
24 1.8 6.0 10.8 76 2
24 2.5 6.0 15.0 80 3
24 2.5 6.0 15.0 80 1
24 2.5 6.0 15.0 80 2
24 3.3 6.0 19.8 83 3
UWR-1-8/6000-D24ACT-C
UWR-2-5/6000-D24ACT-C
FEATURES
RoHS compliant
Under voltage lock out
Synchronous recti?er technology
Full 6 Amp output current
Remote on/off & output trim
Minimum 76% ef?ciency at 1.8V
Over voltage, current & temperature
NPX20S24033MC
NPX20S24033PMC
NPX20S48018DC 1
NPX20S48018MC
NPX20S48018PMC
NPX20S48025DC 1
NPX20S48025MC
NPX20S48025PMC
NPX20S48033DC 1
NPX20S48033MC
NPX20S48033PMC
24 3.3 6.0 19.8 84 1
24 3.3 6.0 19.8 84 2
48 1.8 6.0 10.8 78 3
48 1.8 6.0 10.8 78 1
48 1.8 6.0 10.8 78 2
48 2.5 6.0 15.0 81 3
48 2.5 6.0 15.0 81 1
48 2.5 6.0 15.0 81 2
48 3.3 6.0 19.8 84 3
48 3.3 6.0 19.8 84 1
48 3.3 6.0 19.8 84 2
NPH25S2403EIC
UWR-1-8/6000-D48ACT-C
UWR-2-5/6000-D48ACT-C
NPH25S4803EIC
protection
INPUT CHARACTERISTICS
Operation to zero load
UL 60950 recognised
Parameter
Voltage range 3
Conditions
Continuous operation 24V I/P types
Continuous operation 48V I/P types
Min.
18
36
Typ.
24
48
Max.
36
75
Units
V
Turn On Threshold NPX20S24XXXC
16
17
18
DESCRIPTION
The NPX20 series of open frame DC/DC con-
verters is available in three industry standard
Under voltage lock out
Turn Off Threshold NPX20S24XXXC
Turn On Threshold NPX20S48XXXC
Turn Off Threshold NPX20S48XXXC
11
30
25
16
32
32
16.5
35
34.5
V
footprints, two surface mount land patterns and
Input standby current
1.4
mA
a through hole DIP footprint. Planar magnetic
and synchronous-recti?er design offer ef?-
Power consumption
Re?ected ripple current
Zero load
For measurement method see page 3
40
1.0
W
mA p-p
ciencies from 76% at 1.8V. The series offers
features including no load operation, input
undervoltage shutdown, over current protection,
short-circuit protection, and thermal shutdown.
Standard variants include output voltage adjust-
ment and remote on/off control. The product
has been recognized by Underwriters Laboratory
(UL) to UL 60950 for basic insulation, ?le number
E179522 applies.
OUTPUT CHARACTERISTICS
Parameter Conditions
Voltage set point error
Overall voltage envelope Substrate temperature -40°C to +85°C
Line regulation
Load regulation
BW = 0 to 20MHz with 1μF ceramic
Ripple & noise 2
& 10μF tantalum capacitors
NPX20SXX018
Voltage trim range
All other types
Peak deviation (50-100% & 100-50% swing)
Transient response
Settling time (within 1% V OUT NOM )
Min.
-2.0
-3.0
-5.0
-10.0
Typ.
2.0
10
600
Max.
+2.0
+3.0
5.0
20.0
100
+10.0
+10.0
Units
%V OUT
%V OUT
mV
mV
mV p-p
%V OUT
%V OUT
μs
From remote on/off NPX20S24XXXC
5.0
Start delay
Overcurrent protection
Overvoltage protection
From remote on/off NPX20S48XXXC
From application of V IN NPX20S24XXXC
From application of V IN NPX20S48XXXC
5.0
300
800
110
140
ms
%I OUT
%V OUT
　
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com
1. A four pin version D4C is also available, please refer to mechanical dimensions, package style 3.
2. A minimum load of 5% may be required to meet ripple and noise speculation with +V IN <24V.
3. A 33μF low ESR capacitor, speci?ed as C3 in the recommended EMC ?lter on page 2, must be connected to the input of the NPX20 to
ensure that the part is supplied by a low impedance source.
All speci?cations typical at T A =25°C, nominal input voltage and rated output current unless otherwise speci?ed.
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
2010/02/08
KDC_NPX20C.I01 Page 1 of 8
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