Logic Compatibility .............................................. Open Collector TTL
EC On .............................................................................. Open Circuit
EC Off ...................................................................................... < 0.7V
Shutdown Idle Current ............................................................... 8mA
ORDERING INFORMATION
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
Page 2
WPN20R
REV A
3/2000
MECHANICAL
PIN SIDE DOWN
SIDE VIEW
0.425 + 0.00
(10.80 + 0.08)
0.150
0.040 + 0.002
(1.02 + 0.05)
(3.81)
(40.39 + 0.13)
1.590 + 0.005
WPN20Rxxyzz
0.015 + 0.003
(0.38 + 0.08)
PIN CONNECTIONS
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
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.
5
1.990 + 0.005
(50.55 + 0.13)
1
2
7
3
4
8
6
PIN SIDE UP
SIMPLIFIED CIRCUIT DIAGRAM
Percentage of Rated Output Load (%)
100
80
60
40
20
0
THERMAL DERATING CURVE
Ambient
Case
-40
0
85
95
100
105
Temperature (C)
110
115
120
130
HYSTERESIS GRAPH
HYSTERESIS GRAPH
Undervoltage Lockout Threshold Voltages
Nominal Input Shutdown Low
Voltage Range
Voltage (V1)
OFF
12
7
24
15.5
48
30
Shutdown High
Voltage (V2)
ON
8.8
17
33
Specifications typical at TA=25°C, rated output current.
WPN20R
REV A
3/2000
Page 3
PERFORMANCE GRAPHS
EFFICIENCY VS. OUTPUT LOAD
90
85
80
15V
12V
5V
3V
10
10
EFFICIENCY VS. TEMPERATURE
Change in Efficiency (%)
5
5
100% Load
Efficiency (%)
75
70
65
60
55
50
10
20
40
50
60
80
100
0
0
20% Load
-5
-5
-10
-10
-40
-15
25
65
110
Output Load (% or Rated)
Tcase (C)
50%Load
10%Load
100%Load
0.6
EFFICIENCY VS. INPUT VOLTAGE
OUTPUT RIPPLE VS. INPUT VOLTAGE
1.4
Change in Efficiency (%)
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
LL
Nom
Normalized Output Ripple
HL
1.2
1
0.8
0.6
Vin
0.4
LL
Nom
Vin
HL
TRIM RESISTOR VS. OUTPUT VOLTAGE CHANGE
50
45
5
5
3 -trim +trim
OUTPUT RIPPLE VS. TEMPERATURE
1.2
40
Trim Resistor (K Ohms)
35
30
25
20
15
10
5
0
10
9
8
7
6
5
4
3
2
1
Normalized Output Ripple
1
0.8
0.6
-40
-15
25
65 110
Percentage Change In Output Voltage
Tcase (C)
TRIM RESISTOR VS. OUTPUT VOLTAGE CHANGE
12
15 15
+trim -trim trim
100
90
80
Trim Resistor (K Ohms)
70
60
50
40
30
20
10
0
10
9
8
7
6
5
4
3
2
1
Percentage Change In Output Voltage
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
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