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
C
C
C
Operating at Vi nom, Io nom
Vi nom
Non operational
L50.8 x W40.6 x H10.2
Free air convection
Metal
See derating curve
-40
% /
o
C
+ 100
C
mm
o
INPUT SPECIFICATIONS
Characteristics
Input voltage range
No load input current
Input voltage w/o damage
Startup voltage
Input filter
Conditions
Ta min ... T max, Io nom
a
Vi nom, Io = 0
Io nom
Io nom
Pi type
24V models
48V models
24V models
48V models
24V models
48V models
min.
9
18
typ.
24
48
48
max.
36
75
30
20
40
80
8.5
16
unit
VDC
VDC
mA
mA
VDC
VDC
VDC
VDC
OUTPUT SPECIFICATIONS
Characteristics
Output voltage accuracy
Minimum load
Line regulation
Load regulation
Transient recovery time
Temperature coefficient
Ripple & noise
Voltage trim range
Efficiency
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 84%, See model list
%
%
%
S
% /
o
C
mV
mV
%
%
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
www.chinfa.com
2008.09.23
sales@chinfa.com
CHINFA [ CHINFA ELECTRONICS IND. CO., LTD. ]
