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WPN20
20W Regulated DC/DC Converter
KDC_WPN20RC.E01 Page 1 of 5
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SELECTION GUIDE
Order Code
Input Voltage Output
Voltage
Output Current Input Current Efficiency Recommeneded
Alternative
Nom. Min. Nom. Nom. Load
VVAAA%
WPN20R48S05C
Obsolete, recommended alternative:
(click to view data sheets)
UWR-5/4000-D48A-C
WPN20R12S05C UWR-5/4000-D12A-C
WPN20R12S12C UWR-12/1650-D12A-C
WPN20R12D12C BWR-12/830-D12A-C
WPN20R24S03C UWR-3.3/4850-D12A-C
WPN20R24S05C UWR-5/4000-D12A-C
WPN20R24S12C UWR-12/1650-D12A-C
WPN20R24D12C BWR-12/830-D12A-C
WPN20R24D15C BWR-15/670-D12A-C
WPN20R48S12C UWR-12/1650-D48A-C
WPN20R48D12C BWR-12/830-D48A-C
WPN20R48D15C BWR-15/670-D48A-C
INPUT CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Voltage range
All WPN20R12 types 9 12 18
V
All WPN20R24 types 18 24 36
All WPN20R48 types 33 48 75
Reflected ripple current 50 mA p-p
Undervoltage lockout
threshold
All WPN20R12 types 7 8.8
V
All WPN20R24 types 15.5 17
All WPN20R48 types 30 33
OUTPUT CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Rated power 20 W
Voltage setpoint accuracy ±1.5 %
Temperature coefficient ±0.005 %/ºC
Line regulation High line to low line Singles ±0.1 %
Duals ±0.5 %
Load regulation Min load to
Nom. load
Singles ±0.5 %
Duals ±2.0 %
Ripple & Noise Single outputs, BW = 5Hz to 20MHz 60 100 mVp-p
Dual outputs, BW = 5Hz to 20MHz 50 100 mVp-p
Output voltage adjust range See attached plots
Short circuit &
overcurrent protection Continuous
GENERAL CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Switching frequency 300 kHz
Max capacitive load 550 mF/A
MTTF per ML-HDBK-217
Ground benign
Circuit stress method
TA = +25º unmodified database 1.4 MHr
FEATURES
RoHS compliant
Operating temperature range: -40ºC to
+100ºC
Industry standard pinout
Input and output filtering
Low profile shell
Single and dual outputs
Output trim function
DESCRIPTION
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.
An output trim feature is provided, allowing the
user to compensate for long line lengths.
Applications include: Telecommunications, Battery
Powered Sytems, Process Control Equipment,
Transportation Equipment and Distributed Power
Systems.
The product range has been recognised by Under-
writers Laboratory (UL) to UL 1950 for operational
insulation, file number E179522 applies.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.