WPA50 REV A 5/2003
50 Watt Single Output Eighth Brick DC/DC Converter
WP
WP
WP
WP
WPA50
A50
A50
A50
A50
Corporate: www.cdtechno.com
Corporate: www.cdtechno.com
Product: www.cdpoweronline.com
Industry Standard Footprint & Size -
2.3" x 0.9" x 0.35"
(58.42mm x 22.86mm x 9.0mm)
High Efficiency - Up To 91%
Wide Input Voltage Range: 36 75V
DC
with 100V100mS Input Voltage Transient
Protection
Output Voltages: 1.2 V, 1.5V, 1.8V,
2.2V, 2.5V, 3.3V & 5.0V
Output Trim Function with Industry
Standard Equations
Remote Output Sense
Remote ON/OFF (Positive or
Negative Logic)
Output Overvoltage Protection
Output Overcurrent Protection -
Hiccup Mode
Input Side "L" Filter
No Minimum Load Required
No Heatsinks
Low Profile and Low Weight
Thermal Shutdown
Remote On/Off Control
Isolation Voltage of 1500 V
DC
Soft Start
High Reliability
Fixed Frequency Operation
Safety per UL/CUL 60950, EN 60950,
Operational Insulation Meets TNV-SELV
Isolation Requirements
Meets Conducted Emissions Requirements
of FCC Class B and EN55022 Class B with
External Filter
C&D Technologies, Power Electronics
Division is ISO9001:2000 Certified
The WPA50 Series is a 50 Watt single
output, low-profile DC-DC converter in
an industry standard package of 2.3" x
0.9" x 0.35" (58.42mm x 22.86mm x
9.0mm). The WPA50 uses unique
proprietary technologies to deliver ultra-
high efficiencies and excellent thermal
performance. It includes extensive
control and protection features for
maximum flexibility and provides a
versatile solution for a whole range of
applications with its input voltage range
of 36-75 V
DC
and output voltages
between 1.2V
DC
and 5.0V
DC
.
The power dissipation of the WPA50
series is so low that a heat sink is not
required. The product features fast
dynamic response characteristics and
low output ripple critical for low voltage
applications. WPA DC-DC converter
modules are certified to UL/CUL 60950,
and VDE to EN60950. It meets CISPR22/
EN55022/FCC15J Class B specs for EMI
levels with external filtering.
This high quality and highly reliable
product is competitively priced and an
ideal solution for distributed power,
telecoms and datacom applications.
NOMINAL
RATED
INPUT
OUTPUT
OUTPUT CURRENT
INPUT
EFFICIENCY
VOLTAGE
VOLTAGE
MIN
RATED
CURRENT
(%)
MODEL
(V
DC
)
(V
DC
)
LOAD(A)
OUTPUT (A)
RATED LOAD (A)
MIN
WPA50R48S012
48
1.2
0.0
18
0.65
71
WPA50R48S015
48
1.5
0.0
18
0.72
79
WPA50R48S018
48
1.8
0.0
18
0.82
83
WPA50R48S022
48
2.2
0.0
18
0.99
84
WPA50R48S025
48
2.5
0.0
18
1.11
85
WPA50R48S033
48
3.3
0.0
15
1.20
89
WPA50R48S050
48
5.0
0.0
10
1.18
90
PRODUCT SELECTION CHART
Output Short-Circuit Duration
Continuous
Internal Power Dissipation
As low as 5 Watts
Lead Temperature (soldering, 10 seconds max)
+300C
Continuous Input Voltage
75 VDC
Storage Temperature
+125C
Input to Output Isolation
1500 V
DC
ABSOLUTE MAXIMUM RATINGS
2
WPA50 REV A 5/2003
Product: www.cdpoweronline.com
SPECIFICATIONS, ALL MODELS
Specifications are at T
A
= +25C, Airflow = 300LFM (1.5m/s) at nominal input voltage unless otherwise specified.
ISOLATION
Input/Output Isolation Voltage
1500
2250
V
DC
Resistance
10
M
Capacitance
1.5
nF
Leakage Current
240 Vrms, 50Hz
100
A
OUTPUT
Rated Power
WPA50R48S012
22
W
WPA50R48S015
27
W
WPA50R48S018
33
W
WPA50R48S022
40
W
WPA50R48S025
45
W
WPA50R48S033
50
W
WPA50R48S050
50
W
Voltage Setpoint Accuracy
1.0
1.5
% of V
NOM
Output Voltage Trim Range
WPA50R48S012
1.08
1.32
V
WPA50R48S015
1.35
1.65
V
WPA50R48S018
1.62
1.98
V
WPA50R48S022
1.98
2.42
V
WPA50R48S025
2.25
2.75
V
WPA50R48S033
3.00
3.63
V
WPA50R48S050
4.50
5.50
V
Temperature Coefficient
0.002
0.005
%/C
Output Voltage Regulation
Line Regulation
Vin = 36V - 75V, Iout = Max
0.1
0.2
%
Load Regulation
Vin = 48V, Iout = 0-Max
0.1
0.2
%
Ripple & Noise (NOTE 1)
Vin = 48V, < 20Mhz bandwidth
75
mVp-p
Transient Response
Step change in output current
(50%-100% Step @ 1A/mS)
1.2 Vout
Vin = 48V
100
mV
5.0 Vout
Vin = 48V
100
mV
Turn-On Time
Vin = 48V
200
500
mS
Remote Sense Compensation
10
%
Overcurrent Protection
Vin = 48V
105
140
%
GENERAL
Switching Frequency
380
400
420
KHz
MTTF per ML-HDBK-217
Circuit Stress Method
Ground Benign
TA = +25
TBD
Hrs
NOTE 1: Measured at 20 MHz bandwidth across a
6f multi layer ceramic capacitor located approximately 1" from output terminals.
INPUT
OUTPUT
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
INPUT
Voltage Range
Vin = 48V, Io=I Rated
36
48
75
V
DC
Reflected Ripple Current
Vin = 48V, Io=I Rated
420
550
mApk-pk
Transient Withstand (Susceptibility)
100ms
100
V
Inrush Charge
42
C
Maximum Input Current
Vin=36V
1.2 Vout
0.75
A
1.5 Vout
0.925
A
1.8 Vout
1.10
A
2.2 Vout
1.31
A
2.5 Vout
1.5
A
3.3 Vout
1.6
A
5.0 Vout
1.55
A
INPUT CONTROL
Temperature Shutdown
115
C
Temperature Hysteresis
5
C
Quiescent Standby Current
Vin = 48V
3
4
mA
Power Dissipation
No Load, Remote On/Off
Disabled, Vin = 48Vdc
300
mW
Undervoltage Shutdown
31.50
32.5
35.0
V
Undervoltage Hysteresis
0.50
2
3.00
V
3
WPA50 REV A 5/2003
Product: www.cdpoweronline.com
PERFORMANCE CURVES
Rev B of the WPA50 Datasheet will include extensive performance curves and graphs.
4
WPA50 REV A 5/2003
Product: www.cdpoweronline.com
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.
Power Electronics Division, Americas
3400 E Britannia Drive, Tucson, Arizona 85706
Tel: 800.547.2537 Fax: 520.295.4197
C&D Technologies, EMEA/Asia/Pacific
Milton Keynes MK14 5BU UK
Tel: +44 (0)1908 615232 Fax: +44 (0)1908 617545
MECHANICAL
To Find Model Number
Model Numbers Part Numbers
WPA50R48S012
6064958
WPA50R48S015
6064959
WPA50R48S018
6064960
WPA50R48S022
6064961
WPA50R48S025
6064962
WPA50R48S033
6064963
WPA50R48S050
6064964
WPA50R48S012-1
6064967
WPA50R48S015-1
6064968
WPA50R48S018-1
6064969
WPA50R48S022-1
6064970
WPA50R48S025-1
6064971
WPA50R48S033-1
6064972
WPA50R48S050-1
6064973
ORDERING INFORMATION
WPA5048S y -
Device Family
50 Watt, Single Output,
Eighth Brick, 48VDC Input Range
Model Number
Selected from Product Selection Chart (above)
y = 012 = 1.2V, 015 = 1.5V, 018 = 1.8V, 022 = 2.2V,
025 = 2.5V, 033 = 3.3V, 050 - 5.0V,
Remote On/Off Logic
No Number = Positive Logic
1 = Negative Logic
#
Function
1
+Vin
2
On/Off
3
-Vin
4
-Vout
5
- Sense
6
Trim
7
+ Sense
8
+Vout
PIN CONNECTIONS
TOP VIEW
(PIN SIDE DOWN)
SIDE VIEW
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