WPN20R REV A 3/2000
Page 1
PRODUCT SELECTION CHART
Specifications are at T
A
= +25C nominal input voltage, rated output current unless otherwise specified.
Corporate: www.cdtechno.com
Product: www.cdpowerelectronics.com
20 Watt Regulated DC/DC Converter
WPN20R
Operating Temperature Range:
-40C to +100C
Industry Standard Pinout
Input and Output Filtering
Low Profile Shell
Single and Dual Outputs
High Efficiency
Remote On/Off Function
Output Trim Function
Zero Load Operation
EN 60950, UL1950, C-UL,
VDE Agency Approvals
NOMINAL
RATED OUTPUT CURRENT (A)
INPUT
INPUT
OUTPUT
MIN
NOM
CURRENT
EFFICIENCY
MODEL*
VOLTAGE (VDC)
VOLTAGE (VDC)
LOAD
LOAD
NOM LOAD
(%)
WPN20R12S03
12
3.3
0.0
6.00
2.00
82
WPN20R12S05
12
5.0
0.0
4.00
2.00
84
WPN20R12S12
12
12.0
0.0
1.66
2.00
86
WPN20R12S15
12
15.0
0.0
1.33
2.00
86
WPN20R12D05
12
5.0
0.0
2.00
2.00
84
WPN20R12D12
12
12.0
0.0
0.83
2.00
86
WPN20R12D15
12
15.0
0.0
0.67
2.00
86
WPN20R24S03
24
3.3
0.0
6.00
1.00
83
WPN20R24S05
24
5.0
0.0
4.00
1.00
84
WPN20R24S12
24
12.0
0.0
1.66
1.00
87
WPN20R24S15
24
15.0
0.0
1.33
1.00
87
WPN20R24D05
24
5.0
0.0
2.00
1.00
85
WPN20R24D12
24
12.0
0.0
0.83
1.00
87
WPN20R24D15
24
15.0
0.0
0.67
1.00
87
WPN20R48S03
48
3.3
0.0
6.00
0.50
83
WPN20R48S05
48
5.0
0.0
4.00
0.50
85
WPN20R48S12
48
12.0
0.0
1.66
0.50
88
WPN20R48S15
48
15.0
0.0
1.33
0.50
86
WPN20R48D05
48
5.0
0.0
2.00
0.50
85
WPN20R48D12
48
12.0
0.0
0.83
0.50
87
WPN20R48D15
48
15.0
0.0
0.67
0.50
87
The WPN20R series is a family of
high performance DC/DC converters
available in three input voltage ranges
of 9-18V, 18-36V and 33-75V. The unit
is housed in a space saving aluminum
shell and combines low cost with high
performance across all line and load
conditions. The 300KHz switching
frequency and forward converter
topology provide excellent performance
across all line and load conditions in a
space saving package. Other features
include: full regulation down to zero
load, under voltage lock-out, internal
temperature shutdown, soft start, remote
on/off and over current protection.
An output trim feature is provided,
allowing the user to compensate for long
line lengths. The WPN20R Series is
assembled using a fully automated
process incorporating 100% surface
mounted components for increased
reliability.
Applications include: Telecom-
munications, Battery Powered Sytems,
Process Control Equipment,
Transportation Equipment and
Distributed Power Systems.
NOTE: Other input to output voltages may be available. Please consult factory.
WPN20R REV A 3/2000
Page 2
ORDERING INFORMATION
SPECIFICATIONS, ALL MODELS
Specifications are at T
A
= +25C nominal input voltage, rated output current unless otherwise specified.
GENERAL OUTPUT INPUT
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
INPUT
Voltage Range
9
12
18
V
DC
18
24
36
V
DC
33
48
75
V
DC
Reflected Ripple Current
All Input Ranges
50
mApk-pk
INPUT CONTROL
Temperature Shutdown
Case
105
115
C
Temperature Hysteresis
10
C
Quiescent Standby Current
Current Into + V
IN
8
10
mA
Undervoltage Control
See Attached Plots
OUTPUT
ISOLATION
Rated Voltage
1500
V
DC
Test Voltage
60Hz, 10 Seconds
1500
V
DC
Resistance
10
GW
Capacitance
400
pF
Leakage Current
30
mArms
Rated Power
20
W
Voltage Setpoint Accuracy
1.5
%
Temperature Coefficient
0.005
%/C
Line Regulation
Singles
High Line to Low Line
0.1
%
Duals
High Line to Low Line
0.5
%
Load Regulation
Singles
Mn Load to Nom. Load
0.5
%
Duals
Mn Load to Nom. Load
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 Adjust Range
See Attached Plots
Short Circuit and Overcurrent Protection
Continuous
Max Capacitive Load
550
mF/A
GENERAL
Switching Frequency
300
KHz
MTTF per ML-HDBK-217
Circuit Stress Method
Ground Benign
TA = +25 Unmodified Database
1,400,000
Hr
Package Weight
32
g
TEMPERATURE
Specification
Case
-40
+ 85
C
Operation
Case
-40
+ 85
C
Storage
-55
+125
C
Logic Compatibility .............................................. Open Collector TTL
EC On .............................................................................. Open Circuit
EC Off ...................................................................................... < 0.7V
Shutdown Idle Current ............................................................... 8mA
REMOTE ON/OFF CONTROL
WPN20R XXYZZ
Device Family
20W Regulated DC/DC Unit
Model Number
xx = Input Range, e.g. 48V
y = Number of Outputs (S=single; D=dual)
zz = Output Voltage, e.g. `05' for 5V
WPN20R REV A 3/2000
Page 3
THERMAL DERATING CURVE
SIMPLIFIED CIRCUIT DIAGRAM
Temperature (C)
Percentage of Rated Output Load (%)
-40
0
85
95
100
105
110
115
120
130
100
80
60
40
20
0
Ambient
Case
MECHANICAL
NOTES:
All dimensions are in inches (millimeters).
GRID: 0.100 inches (2.54 millimeters)
Pin Placement: Tolerance: 0.015
Marked with: specific model ordered, date code,
job code.
MATERIAL: Units are encapsulated in a low
thermal resistance molding compound which
has excellent chemical resistance, wide
operating temperature range, and good
electrical properties under high humidity
environments. The encapsulant and outer shell
of the unit have UL94V-0 ratings. Lead material
is brass with a solder plated surface to allow
ease of solderability.
WPN20Rxxyzz
PIN SIDE DOWN
SIDE VIEW
PIN SIDE UP
0.425 + 0.00
(10.80 + 0.08)
0.150
(3.81)
0.040 + 0.002
(1.02 + 0.05)
0.015 + 0.003
(0.38 + 0.08)
1.990 + 0.005
(50.55 + 0.13)
1.590
+
0.005
(40.39
+
0.13)
1
2
3
4
5
6
7
8
Pin Function
Number
Singles
Duals
1
+VIN
+VIN
2
-VIN
-VIN
3
NO PIN
NO PIN
4
Remote On/Off
Remote On/Off
5
NO PIN
+VOUT
6
+VOUT
COMMON
7
-VOUT
-VOUT
8
TRIM
TRIM
PIN CONNECTIONS
Undervoltage Lockout Threshold Voltages
Nominal Input
Shutdown Low
Shutdown High
Voltage Range
Voltage (V1)
Voltage (V2)
OFF
ON
12
7
8.8
24
15.5
17
48
30
33
Specifications typical at TA=25C, rated output current.
HYSTERESIS GRAPH
HYSTERESIS GRAPH
WPN20R REV A 3/2000
Page 4
PERFORMANCE GRAPHS
Power Electronics Division, United States
3400 E Britannia Drive, Tucson, Arizona 85706
Tel: 800.547.2537 Fax: 520.770.9369
C&D Technologies, (NCL)
Milton Keynes MK14 5BU UK
Tel: +44 (0)1908 615232 Fax: +44 (0)1908 617545
Any data, prices, descriptions or specifications presented herein are subject to revision by C&D Technologies, Inc. without notice. While such information is believed to
be accurate as indicated herein, C&D Technologies, Inc. makes no warranty and hereby disclaims all warranties, express or implied, with regard to the accuracy or
completeness of such information. Further, because the product(s) featured herein may be used under conditions beyond its control, C&D Technologies, Inc. hereby
disclaims all warranties, either express or implied, concerning the fitness or suitability of such product(s) for any particular use or in any specific application or arising from
any course of dealing or usage of trade. The user is solely responsible for determining the suitability of the product(s) featured herein for user's intended purpose and
in user's specific application. C&D Technologies, Inc. does not warrant or recommend that any of its products be used in any life support or aviation or aerospace
applications.
Efficiency (%)
15V
12V
5V
3V
OUTPUT RIPPLE VS. TEMPERATURE
Normalized Output Ripple
-40 -15 25 65 110
Tcase (C)
TRIM RESISTOR VS. OUTPUT VOLTAGE CHANGE
50
45
40
35
30
25
20
15
10
5
0
10
9
8
7
6
5
4
3
2
1
Percentage Change In Output Voltage
Trim Resistor (K Ohms)
5 5
3 -trim +trim
10
5
0
-5
-10
-40
-15
25
65
110
100% Load
20% Load
Tcase (C)
Change in Efficiency (%)
-10
-5
0
5
10
Change in Efficiency (%)
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
Vin
EFFICIENCY VS. INPUT VOLTAGE
LL
Nom
HL
5 0 % L o a d
1 0 % L o a d
1 0 0 % L o a d
Percentage Change In Output Voltage
100
90
80
70
60
50
40
30
20
10
0
10
9
8
7
6
5
4
3
2
1
TRIM RESISTOR VS. OUTPUT VOLTAGE CHANGE
Trim Resistor (K Ohms)
EFFICIENCY VS. OUTPUT LOAD
90
85
80
75
70
65
60
55
50
10
20
40
50
60
80
100
Output Load (% or Rated)
1.4
1.2
1
0.8
0.6
0.4
OUTPUT RIPPLE VS. INPUT VOLTAGE
Normalized Output Ripple
Vin
LL
Nom
HL
12 15 15
+trim -trim trim
1.2
1
0.8
0.6
EFFICIENCY VS. TEMPERATURE
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