WFC02R 11/98 REV B
Page 1
DESCRIPTION
The WFC02R is a family of high performance DC/DC converters
that offers regulated outputs over input voltage ranges of 9-36V
and 18-72V while offering a wide operating temperature range
of -40C to +85C without derating.
Each WFC02R contains input filtering to minimize conducted
noise. The design utilizes surface mounted components, including
magnetics, to provide enhanced reliability.
The converter is designed to meet the requirements of EN60950
with the "L" pinout having 1,500 VDC isolation. All WFC02R
converters are designed to withstand input voltage transients to
200% of nominal input voltage. An additional feature is the ability
of the WFC02R to drive high capacitive loads.
FEATURES
! Low Cost, High Performance
! Small DIP Package
! Full Power to +85C
! Extended Temperature Range: -40C to +85C
! Industry Standard Pinouts
! Full Short Circuit Protection
! High Capacitive Loading Capability
! Protected Against High Input Voltage
Internet: http://www.cdpowerelectronics.com
Power Electronics Division, United States
3400 E Britannia Drive, Tucson, Arizona 85706
Phone: 800.547.2537 Fax: 520.770.9369
Power Electronics Division, Europe
C&D Technologies (Power Electronics) Ltd.
132 Shannon Industrial Estate, Shannon, Co. Clare, Ireland
Tel: +353.61.474.133 Fax:+353.61.474.141
SIMPLIFIED CIRCUIT DIAGRAM
APPLICATIONS
! Telecommunications
! Battery Powered Systems
! Portable Instruments
! Process Control Equipment
! Transportation Equipment
! Distributed Power Systems
Product Data Sheet
2 W
ATT
R
EGULATED
W
IDE
I
NPUT
R
ANGE
DC/DC C
ONVERTER
WFC02R
WFC02R 11/98 REV B
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WFC02R xxyzz
E
Device Family
Indicates wide input power 2W regulated DC/DC
Model Number
Selected from Table of Electrical Characteristics
xx=input voltage
y=number of outputs: S=single, D=dual
zz=output voltage
Pinout option E or L
ORDERING INFORMATION
ABSOLUTE MAXIMUM RATINGS
Output Short Circuit Protection ------------ Continuous
Internal Power Dissipation --------------------------- 1.5W
Lead Temp (soldering, 10s Max) ---------------- +300C
Max Case Temperature --------------------------- +100C
ELECTRICAL SPECIFICATIONS
Specifications typical at T
A
=25C, nominal input voltage, rated output current unless otherwise stated.
Nominal
Rated
Max Input
Max
Input
Output
Output Current (mA)
Current
Capacitive
Efficiency
Voltage
Voltage
(mA)
Load (
F)
%
Model
(Volts)
(Volts)
Min Load Rated Load
Rated Load
WFC02R24S05
24
5.0
40
400
300
400
77
WFC02R24S12
24
12.0
16
167
306
167
76
WFC02R24S15
24
15.0
12
125
306
125
77
WFC02R24D05
24
+5.0
+20
+200
315
+200
75
WFC02R24D12
24
+12.0
+8
+80
315
+80
76
WFC02R24D15
24
+15.0
+7
+67
315
+67
76
WFC02R48S05
48
5.0
40
400
152
400
74
WFC02R48S12
48
12.0
16
167
152
167
74
WFC02R48S15
48
15.0
12
125
152
125
76
WFC02R48D05
48
+5.0
+20
+200
156
+200
74
WFC02R48D12
48
+12.0
+8
+80
156
+80
76
WFC02R48D15
48
+15.0
+7
+67
155
+67
77
WFC02R 11/98 REV B
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COMMON SPECIFICATIONS
Specifications typical at T
A
=25C, nominal input voltage, rated output current unless otherwise stated.
Parameter
Conditions
Min
Typ
Max
Units
Input
Voltage Range
9
24
36
Vdc
18
48
72
Vdc
Reflected Ripple Current
50
mA p-p
Isolation
Safety Standards
Designed to meet requirements of
EN60950, EN41003 & UL1950
Rated Voltage
"L" Pinout
1500
Vdc
"E" Pinout
1000
Vdc
Test Voltage--60 Hz, 10 secs
"L" Pinout
1500
Vpk
"E" Pinout
1000
Vpk
Resistance
10
G
Capacitance
220
pF
Leakage Current
V
iso
=240Vac, 60 Hz
30
Arms
Output
Rated Power
2
W
Voltage Setpoint Accuracy
+3.0
%
Temperature Coefficient
+0.02
%/C
Line Regulation-singles
Low line to high line
+1.5%
%
Line Regulation-duals
Low line to high line
+1.5%
%
Load Regulation-singles
Min load to rated load
+2%
%
Load Regulation-duals
Min load to rated load
+2%
%
Ripple & Noise
BW=5 Hz to 20 MHz
50
100
mV p-p
General
MTTF per MIL-HDBK-217, Rev F
T
A
=25
1,000,000
Hours
Temperature
Operation
-40
+85
C
Storage
-55
+125
C
WFC02R 11/98 REV B
Page 4
TECHNICAL INFORMATION
Notes:
1.
All dimensions in inches and (millimeters).
2.
Units are encapsulated with a low thermal resistance molding compound which has excellent chemical resis-
tance, wide operating temperature range and good electrical properties under high humidity environments. The
encapsulant and outer shell have UL94V-0 ratings. Lead material is brass with a solder plated surface to allow
ease of solderability.
3.
GRID: 0.100 inches, (2.54 mm).
4.
Pin Placement Tolerance: +0.015", (+.381 mm).
Pin
Pin Function
Number
Singles
Duals
1
+Vin
+Vin
2
No connection
-Vout
3
No connection
Common
10
-Vout
Common
11
+Vout
+Vout
12
-Vin
-Vin
13
-Vin
-Vin
14
+Vout
+Vout
15
-Vout
Common
22
No connection
Common
23
No connection
-Vout
24
+Vin
+Vin
The information provided herein is believed to be reliable; however, C&D TECHNOLOGIES assumes no responsibility for inaccuracies or omissions. C&D TECHNOLOGIES assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user's own risk. Prices and specifications are subject to change without notice.
No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. C&D TECHNOLOGIES does not authorize or warrant any C&D TECHNOLOGIES
product for use in life support devices/systems or in aircraft control applications.
MECHANICAL SPECIFICATIONS
PINOUT "E"
Pin
Pin Function
Number
Singles
Duals
2
-Vin
-Vin
3
-Vin
-Vin
9
No connection
Common
11
No connection
-Vout
14
+Vout
+Vout
16
-Vout
Common
22
+Vin
+Vin
23
+Vin
+Vin
PINOUT "L"
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