WPN20
20W Regulated DC/DC Converter
SELECTION GUIDE
Input Voltage
Output Current
Input Current
Nom. Load
A
Output
Efficiency
Voltage
Order Code
Nom.
V
Min.
A
Nom.
A
V
5.0
%
84
86
86
83
84
87
87
87
85
88
87
87
12
12
12
24
24
24
24
24
48
48
48
48
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
4.00
1.66
0.83
6.00
4.00
1.66
0.83
0.67
4.00
1.66
0.83
0.67
2.00
WPN20R12S05C
WPN20R12S12C
WPN20R12D12C
WPN20R24S03C
WPN20R24S05C
WPN20R24S12C
WPN20R24D12C
WPN20R24D15C
WPN20R48S05C
WPN20R48S12C
WPN20R48D12C
WPN20R48D15C
12.0
12.0
3.3
2.00
2.00
1.00
5.0
1.00
12.0
12.0
15.0
5.0
1.00
1.00
1.00
0.50
12.0
12.0
15.0
0.50
FEATURES
ꢀRoHS compliant
0.50
0.50
ꢀOperating temperature range: -40ºC to
INPUT CHARACTERISTICS
+100ºC
Parameter
Conditions
Min.
9
Typ.
Max.
18
Units
ꢀIndustry standard pinout
ꢀInput and output filtering
ꢀLow profile shell
All WPN20R12 types
12
24
48
Voltage range
All WPN20R24 types
All WPN20R48 types
18
33
36
V
mA p-p
V
75
Reflected ripple current
50
ꢀSingle and dual outputs
ꢀOutput trim function
All WPN20R12 types
All WPN20R24 types
All WPN20R48 types
7
8.8
17
Undervoltage lockout
threshold
15.5
30
33
DESCRIPTION
OUTPUT CHARACTERISTICS
The WPN20RC series is available in three input
voltage ranges of 9-18V, 18-36V and 33-75V. The
unit is housed in a space saving aluminum shell.
The 300KHz switching frequency and forward
converter topology provide excellent performance
across all line and load conditions. Other features
include: under voltage lock-out, internal tem-
perature shutdown, soft start and over current
protection.
Parameter
Rated power
Conditions
Min.
Typ.
Max.
20
Units
W
Voltage setpoint accuracy
Temperature coefficient
1.5
%
0.005
0.1
%/ºC
%
Singles
Duals
Line regulation
Load regulation
High line to low line
0.5
%
Singles
Duals
0.5
%
Min load to
Nom. load
2.0
%
Single outputs, BW = 5Hz to 20MHz
Dual outputs, BW = 5Hz to 20MHz
See attached plots
60
50
100
100
mVp-p
mVp-p
Ripple & Noise
An output trim feature is provided, allowing the
user to compensate for long line lengths.
Output voltage adjust range
Applications include: Telecommunications, Battery
Powered Sytems, Process Control Equipment,
Transportation Equipment and Distributed Power
Systems.
Short circuit &
overcurrent protection
Continuous
GENERAL CHARACTERISTICS
Parameter
Switching frequency
Conditions
Min.
Typ.
300
550
Max.
Units
kHz
The product range has been recognised by Under-
writers Laboratory (UL) to UL 1950 for operational
insulation, file number E179522 applies.
Max capacitive load
mF/A
MTTF per ML-HDBK-217 Circuit stress method
1.4
MHr
Ground benign
TA = +25º unmodified database
All specifications typical at T =25°C, nominal input voltage and rated output current unless otherwise specified.
A
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com
Technical enquiries - email: mk@murata-ps.com, tel: +44 (0)1908 615232
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