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
5.8
1.5mm from case for 10 seconds
Tested for 1 minute and 1mA max
Test at 500VDC
100KHz,1V
1000
1000
80
0.1
Free Air Convection
Continuous
Plastic(UL94-V0)
K hours
g
-40
-55
15
300
VDC
MΩ
pF
W
Test Conditions
Min
Typ.
Max
95
85
125
°C
Units
%
APPLICATION NOTE
CS Pin
By connecting a low ESR capacitor between
this terminal and the pin-7(Figure 1), the output
ripple and noise may be further improved.
Generally, the capacitance is no greater than
47uF.
Requirement on Output Load
To ensure this module can operate efficiently
and reliably, During operation, the minimum
output load is not less than 10% of the full load,
If the actual load is less than the specified
minimum load, the output ripple may increase
sharply. If the actual output power is very
small, please add an appropriate resistor as
extra loading, or contact our company for other
lower output power products.
Recommended Circuit
If you want to further
input/output
ripple,
you
Note:
1. All specifications measured at T
A
=25°C, humidity<75%, nominal input voltage and rated output load unless
otherwise specified.
2. See below recommended circuits for more details.
decrease
can
the
TYPICAL TEMPERATURE CURVE
increase
capacitance properly or choose capacitors with
low ESR (Figure 1).
Vin
Li
6
2
8
Ci
GND
1
CS
Co
Cs
7 4 .7 -1 2 uH
10 +Vo2
9
Co
0V2
0V1
+Vo2
+Vo1
100
Operating Temp.(
C
)
OUTLINE DIMENSIONS & FOOTPRINT DETAILS
Firs t Angle Projection
(1. 079)
RECOMMEN DED FOOTPR INT
Top
view,grid: 2.54 mm(0.1inch)
diameter:1.00mm(0.039inch)
(Bottom View)
1 2
6 7 8 9 10
9.50
(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)Cin： 5V & 12V
100μF
24V & 48V
10μF-47μF
Lin： 10μH-120μH
Cout：100μF(TYP)
Extemal Capacitor Table(Table 1)
Vout(VDC) 2W:Cout(uF) 1W:Cout(uF)
5
680
470
9
470
330
12
330
220
15
220
100
Input current
While using unstable power source, please
ensure the output voltage and ripple voltage do
not excced indexes of the converter. The
preceding power source must be able to
2.30
±
0.50
(0.100)
1 2
6 7 8 9 10
12.00
(0.472)
provide for converter sufficient starting current
Input Current(A)
4.10
(Side View)
FOOTPR INT DETAILS
Pin
1
2
6
7
8
9
10
Function
GND
Vin
+Vo1
0V1
CS
0V2
+Vo2
Ip (Figure 2). General: Ip
≤1.4*Iin-max
Ip
0.50
(0.020)
Note:
Unit :mm(inch)
Pin sect ion:0. 50*0.30mm(0.020*0.012inch)
Pin sect ion tolerances:
±
0. 05mm(
±
0.002inch)
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.
WRD_S-1W & WRD_S-2W
A/1-2008
Page 2 of 2
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