WDD20U SERIES
SINGLE & DUAL OUTPUT
SPECIFICATION
All Specifications Typical At Nominal Line, Full Load, 25
o
C Unless Otherwise Noticed
GENERAL
Characteristics
Switching frequency
Isolation voltage
Isolation resistance
Ambient temperature
Case temperature
Derating
Storage temperature
Dimension
Cooling
Case material
Conditions
Vi nom, Io nom
Input / Output
Input / Output, @ 500VDC
Vi nom,
Io nom
3.3V & 5V output models
12V, 15V & dual output models
min.
1,500
100
-40
-40
typ.
250
max.
unit
KHz
VDC
M
+ 60
+ 71
+ 100
o
o
o
o
C
C
C
Operating at Vi nom, Io nom
Vi nom
Non operational
L40.6 x W50.8 x H10.2
Free air convection
Metal
See derating curve
-40
%/ C
+ 100
C
mm
o
INPUT SPECIFICATIONS
Characteristics
Input voltage range
Conditions
Ta min ... T max, Io nom
a
min.
9
18
35
typ.
12
48
24
48
30
20
15
max.
18
36
75
unit
VDC
VDC
VDC
mA
No load input current
Vi nom, Io = 0
12V models
24V models
48V models
Input voltage w/o damage
Io nom
12V models
24V models
48V models
20
40
80
8.5
16
33
VDC
VDC
VDC
VDC
Startup voltage
Io nom
12V models
24V models
48V models
Input filter
Pi type
OUTPUT SPECIFICATIONS
Characteristics
Output voltage accuracy
Minimum load
Line regulation
Load regulation
Transient recovery time
Temperature coefficient
Ripple & noise
Voltage trim range
Efficiency
www.chinfa.com
2008.09.23
Vi nom
Conditions
Vi nom, Io nom
single output models
dual output models (each output)
min.
0
10
typ.
max.
2
unit
%
%
%
Io nom, Vi min ...Vi max
Vi nom, Io 0 ... Io nom, single output models
Vi nom, Io min ... Io nom, dual output models
1
2
5
500
0.02
100
150
5
10
Up to 89%, See model list
%
%
%
S
% / C
mV
mV
%
%
o
Vi nom, Io 0 ...1/2 Io nom
Vi nom, Io nom
Vi nom, Io nom,
3.3V & 5V output models
BW = 20MHz
12V, 15V & dual
Vi nom
3.3V output models
5V, 12V, 15V & dual
Vi nom, Io nom, Po / Pi
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CHINFA [ CHINFA ELECTRONICS IND. CO., LTD. ]
