COMMON SPECIFICATION
Item
Storage Humidity
Operating Temperature
Storage Temperature
Temp. Rise at Full Load
Lead Temperature
Isolation voltage
Isolation resistance
Isolation Capacitance
No-load power consumption
Cooling
Short Circuit Protection
Case Material
MTBF
Weight
1000
5
1.5mm from case for 10 seconds
Tested for 1 minute and 1mA max
Test at 500VDC
100KHz,1V
3000
1000
35
120
Free Air Convection
Continuous, Automatic recovery
Plastic(UL94-V0)
K hours
g
-40
-55
15
300
VDC
MΩ
PF
mW
Test Conditions
Min
Typ
Max
95
85
125
°C
Units
%
APPLICATION NOTE
Recommended circuit
If you want to further decrease the input/output
ripple, an
“LC”
filtering network may be connected
to the input and output ends of the DC/DC
converter, see (Figure 1).
Single Output
Vc
Vi n
Cin
G ND
1
7
D1 Ic R
Lin 2
3
6
8
Cs
Co ut
0V
+Vo
Dual Output
Vc
V in
C in
7
D1 I c R
Lin
2
3
6
Lout
Cout
+Vo
0V
Cout
-Vo
G ND
1
8
Lout
Note:
1. All specifications measured at TA=25°C, humidity<75%, nominal input voltage and rated output load unless
otherwise specified.
4. See below recommended circuits for more details.
(Figure 1)
However, the capacitance of the output filter
capacitor must be proper. If the capacitance is too
big, a startup problem might arise. For every
channel of output, provided the safe and reliable
operation is ensured, the greatest capacitance of
its filter capacitor sees (Table 1). General:
Cin:
Cout:
Lin:
Lout:
Cs:
5V,12V
24V,48V
47μF(Typ.)
4.7μH -120μH
2.2μH-10μH
10μF-22μF
100μF
10μF
TYPICAL TEMPERATURE CURVE
100
Operating Temp.(
C
)
OUTLINE DIMENSIONS & FOOTPRINT DETAILS
External Capacitor Table(Table 1)
Single Vout
Cout
Dual Vout
Cout
(VDC)
(
μ
F)
(VDC)
(
μ
F)
5
680
±5
330
9
560
±9
270
12
470
±12
220
15
330
±15
150
CTRL Terminal
When open or high impedance,the converter
First Angle Projection
1 2 3
5 67 8
Bottom View
work well; When this pin is
‘high’;
the converter
shutdown; It should be note that the input
current
(Ic) should between 5-10mA, exceeding the
maximum 20mA will cause permanence damage
to the converter. The value of R Can be derived as
follows :
R=
V
C
-V
D
-1.0
RECOMMENDED FOOTPRINT
Top
view,grid:2 .54mm(0.1inch),
diam eter:1.00m m(0.039inch)
Dual/Single Output
(0.866)
3
5
Ic
Input current
While using unstable power source, please
ensure the output voltage and ripple voltage do
not
excced indexes
of
the converter. The
12.00
0.50
4.10
Side View
FOOTPRINT DE TAILS
Single
Pin
1
GND
2
Vin
3
CTRL
5
NC
6
+Vo
7
0V
8
CS
NC:No Connection
Dual
GND
Vin
CTRL
NC
+Vo
0V
-Vo
preceding power source must be able to provide
for converter sufficient starting current Ip (Figure
2).General: Ip
≤1.4*Iin-max
Input Current(A)
Ip
Not e:
Uni t:mm(inch)
Pin section:0.50*0.30mm (0.020*0.012inch)
Pin section tol erances:
+
0.10mm(
+
0. 004inch)
General tolerances:
+
0.25mm(
+
0.010inch)
Input Voltage
Range
Input Voltage (V)
No parallel connection or plug and play.
MORNSUN reserves the copyright
Specifications subject to change without notice.
WRE_CKS-1W & WRF_CKS-1W
A/0-2008
Page 2 of 2
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