www.chinfa.com
KDD25 SERIES
DC - DC CONVERTER
21.5 ~ 25W SINGLE & DUAL OUTPUT
FEATURES
SHORT CIRCUIT PROTECTION
2 YEARS WARRANTY
2:1 INPUT RANGE
ISOLATION INPUT AND OUTPUT 1.5KV DC
HIGH PERFORMANCE UP TO 84%
MODEL LIST
MODEL NO.
INPUT
VOLTAGE
OUTPUT
WATTAGE
OUTPUT
VOLTAGE
OUTPUT
CURRENT
EFF.
(min.)
+ 5 VDC
+ 12 VDC
+ 15 VDC
+3.3 VDC
Single Output Models
Dual Output Models
KDD25 - 12S01
KDD25 - 12S02
KDD25 - 12S03
KDD25 - 12S05
KDD25 - 24S01
KDD25 - 24S02
KDD25 - 24S03
KDD25 - 24S05
KDD25 - 48S01
KDD25 - 48S02
KDD25 - 48S03
KDD25 - 48S05
9~18 VDC
9~18 VDC
9~18 VDC
9~18 VDC
18~36 VDC
18~36 VDC
18~36 VDC
18~36 VDC
36~72 VDC
36~72 VDC
36~72 VDC
36~72 VDC
25 WATTS
25 WATTS
25 WATTS
21.5 WATTS
25 WATTS
25 WATTS
25 WATTS
21.5 WATTS
25 WATTS
25 WATTS
25 WATTS
21.5 WATTS
+ 5 VDC
+ 12 VDC
+ 15 VDC
+3.3 VDC
+ 5 VDC
+ 12 VDC
+ 15 VDC
+3.3 VDC
5000 mA
2100 mA
1700 mA
6500 mA
5000 mA
2100 mA
1700 mA
6500 mA
5000 mA
2100 mA
1700 mA
6500 mA
77%
80%
80%
75%
79%
81%
81%
77%
80%
83%
83%
78%
KDD25 - 12D01
KDD25 - 12D02
KDD25 - 12D03
KDD25 - 24D01
KDD25 - 24D02
KDD25 - 24D03
KDD25 - 48D01
KDD25 - 48D02
KDD25 - 48D03
9~18 VDC
9~18 VDC
9~18 VDC
18~36 VDC
18~36 VDC
18~36 VDC
36~72 VDC
36~72 VDC
36~72 VDC
25 WATTS
25 WATTS
25 WATTS
25 WATTS
25 WATTS
25 WATTS
25 WATTS
25 WATTS
25 WATTS
5 VDC
12 VDC
15 VDC
5 VDC
12 VDC
15 VDC
5 VDC
12 VDC
15 VDC
+4700/-300 mA
+1800/-300 mA
+1400/-300 mA
+4700/-300 mA
+1800/-300 mA
+1400/-300 mA
+4700/-300 mA
+1800/-300 mA
+1400/-300 mA
77%
80%
80%
79%
81%
81%
80%
83%
83%
sales@chinfa.com
www.chinfa.com
KDD25 SERIES
SINGLE & DUAL OUTPUT
Characteristics
Conditions
min.
typ.
max.
unit
Switching frequency
Isolation voltage
Isolation resistance
Ambient temperature
Vi nom, Io nom
Input / Output
Input / Output, @ 500VDC
K H z
1,500
VDC
1G
Characteristics
Conditions
min.
unit
Output voltage accuracy
Vi nom, Io nom
typ.
max.
%
80
1
%
48
Characteristics
Conditions
min.
typ.
max.
unit
Input voltage range
19
18
24
18
36
VDC
VDC
Ta min ... Ta max, Io nom
12
Minimum load
Line regulation
Io nom, Vi min ...Vi max
Vi nom
0
20
%
%
%
Load regulation
o
% / C
Temperature coefficient
Transient recovery time
Vi nom, Io 0 ... Io nom, single output models
Vi nom, Io nom
500
0.02
%
%
S
1
%
single output models
dual output models (each output)
Vi nom, Io min ... Io nom, dual output models
Vi nom, Io nom, BW = 20MHz
mV
Vout x 2%
-25
o
C
+ 71
-25
Case temperature
Operating at Vi nom, Io nom
o
C
Storage temperature
M.T.B.F.
Non operational
According to MIL-HDBK-217F, GF40
-40
+ 100
389,000
o
C
Derating
o
% / C
Vi nom
+ 90
o
C
Efficiency
Up to 83%, See model list
Vi nom, Io nom, Po / Pi
OUTPUT SPECIFICATIONS
Ripple & noise
25% load, step changed
Input reversed
Shunt diode built in, external fuse recommended
Output short circuit
Continuous
CONTROL AND PROTECTION
No load input current
24V models
48V models
mA
mA
Vi nom, Io=0
2
5
Dimension
L70 x W70 x H23
Hrs
Cooling
Free air convection
Case material
Metal
mm
GENERAL
Operating at Vi nom, Io nom
Input voltage w/o damage
20
VDC
VDC
Io nom
40
Input filter
Pi type
INPUT SPECIFICATIONS
12V models
24V models
48V models
12V models
36
48
72
35
30
25
75
VDC
mA
VDC
See derating curve
o
All Specifications Typical At Nominal Line, Full Load, 25 C Unless Otherwise Noticed
SPECIFICATION
sales@chinfa.com
sales@chinfa.com
KDD25 SERIES
SINGLE & DUAL OUTPUT
MECHANISM & PIN CONFIGURATION
PHYSICAL CHARACTERISTICS
CASE SIZE
CASE MATERIAL
WEIGHT
70 x 70 x 23 mm 2.76 x 2.76 x 0.91 inches
Metal
180 g
PIN ASSIGNMENT
PIN NO.
SINGLE
Vi+
Vi -
DERATING
NATURAL
CONVECTION
COOLING
0
100
o
Ambient Temperature [ C ]
71
90
-25
P
o
w
e
r
o
u
t
[
%
]
2
mm [inch]
3
6
7
5
DUAL
Vi+
Vi -
Vo +
Vo +
com
GENERAL
N. C.
Vo -
4
1
Vo +
Vo +
com
Vo -
Vo -
BOTTOM VIEW
2
3
5
6
7
1
4
15.00 [0.59]
10.00 [0.39]
10.00 [0.39]
10.00 [0.39]
10.00 [0.39]
15.00 [0.59]
25.00 [0.98]
20.00 [0.79]
52.50 [2.07]
10.00 [0.39]
7.50 [0.30]
70.00 [2.76]
DIA 1.50 [0.06]
23.00 [0.91]
4.50 [0.18]
www.chinfa.com
PDF 
ZIP