MORNSUN reserves the copyright Specifications subject to change without notice. WRA_D-10W & WRB_D_10W A/2-2008 Page 2 of 2
ISOLATION SPECIFICATIONS
Item Test conditions Min
Typ
Max
Units
Isolation voltage Tested for 1 minute and 1 mA max
1500
VDC
Isolation resistance Test at 500VDC 1000
MΩ
Isolation capacitance Input/Output 1000
pF
COMMON SPECIFICATIONS
Item Test Conditions Min
Typ
Max
Units
Storage Humidity 95 %
Operating Temperature -40
85
Storage Temperature -55
125
Temp. Rise at Full Load 40
Lead Temperature 1.5mm from case for 10 seconds 300
°C
No-load power c
500
mW
Cooling Free Air Convection
Short Circuit Protection Continuous, automatic recovery
Case Material Aluminium alloy
MTBF 1000
hours
Weight 23.5
g
TYPICAL CHARECTERISTICS
Operating Temp.( )
C
Temperature Derating Graph
OUTLINE DIMENSIONS & FOOTPRINT DETAILS
50.80(2.000)
20.32(0.800)
1
2
3
5
5. 08
(0.200)
11. 20
(0.441)
4
7. 62
(0.300)
Single
Dual
No Pin
0V
GND
Vin
+Vo
COM
-Vo
Dual Output
Single Output
Top
view,grid:2.54mm(0.1inch),
diameter:1.20mm(0.047inch)
Note:
Unit:mm(inch)
Pin diameter:0.80mm(0.031inch)
Pin diameter tolerances:0.10mm(0.004inch)
General tolerances:0.25mm(0.010inch)
First Angle Projection
Bottom
View
Side View
APPLICATION NOTE
Requirement on Output Load
In order to ensure the product operate efficiently and reliably, in
addition to a max load (namely
full load), a minimum load is specified for this kind of DC/DC converter. Make sure the specified
range of input voltage is not exceeded, the minimum output load no less than 10% load.
actual load is less than the spec
ified minimum load, the output ripple may increase sharply while
its efficiency and reliability will reduce greatly. If the actual output power is very small,
an appropriate resistor as extra loading, or contact our company for other lower outpu
products.
Recommended Circuit
All the WRA_D-10W & WRB_D-10W
have been tested according to the
recommended testing circuit before leaving
factory. This series should be tested under load.
Never be tested under no load (see Figure 1).
DC
Vin
GND
0V
Cin
Vin
GND
0V
Cin
DCDC
Single Output
(Figure 1)
If you want to further decrease the input/output
ripple, you c
an increase capacitance properly or
choose capacitors with low ESR.
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 rel
ensured, the greatest capacitance of its filter
capacitor sees (Table 1). General:
Cin: 5V&12V 100μF
24V&48V 10μF-47μF
Cout: 10μF/100mA
Output Extemal Capacitor Table(Table 1)
Single Vout
(VDC)
Cout
(uF)
Dual Vout
(VDC)
Cout
(uF)
3.3 2200 ±5
680
5 1000 ±12
330
12 470 ±15
220
15 330 -
-
24 220 - -
Input Current
When it is used in unregulated p
be sure that the fluctuating range of the power
supply and the rippled voltage do not exceed the
module standard. Input current of power supply
should afford the startup current of this kind of
DC/DC module (See figure 2), General:
Ip ≤1.4*Iin-max
Range
Ip
No parallel connection or plug and play.
