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WRA2405YMD-3W Datasheet(PDF) 2 Page - MORNSUN Science& Technology Ltd.

Part # WRA2405YMD-3W
Description  DUAL/SINGLE OUTPUT DC-DC CONVERTER
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Manufacturer  MORNSUN [MORNSUN Science& Technology Ltd.]
Direct Link  http://www.mornsun-power.com
Logo MORNSUN - MORNSUN Science& Technology Ltd.

WRA2405YMD-3W Datasheet(HTML) 2 Page - MORNSUN Science& Technology Ltd.

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The copyright and authority for the interpretation of the products are reserved by Mornsun
Specifications subject to change without notice.
WRA_YMD-3W & WRB_YMD-3W
A/2-2009
Page 2 of 3
OUTPUT SPECIFICATIONS
TYPICAL TEMPERATURE CURVE
Item
Test Conditions
Min
Typ.
Max.
Units
Output power
Refer to products program
0.3
3
W
Positive voltage accuracy
Refer to recommended circuit
±1
±3
Negative voltage accuracy
Refer to recommended circuit
±3
±5
Load regulation
Form 10% to 100% load
±0.5
±1*
Line regulation
Input voltage from low to high
±0.2
±0.5
%
Temperature drift (Vout)
Refer to recommended circuit
±0.03
%/
°C
Ripple & Noise**
20MHz Bandwidth
75
150
mVp-p
Switching frequency
100% load, input voltage range
300
KHz
*Dual output models unbalanced load:
±5%.
**Test ripple and noise by “parallel cable” method. See detailed operation instructions at Testing of Power
Converter section, application notes.
Operating Temp.(
)
C
COMMON SPECIFICATIONS
RECOMMENDED CIRCUIT
Item
Test Conditions
Min.
Typ.
Max.
Units
Storage humidity
95
%
Operating temperature
-40
85
Storage temperature
-55
125
Temp. rise at full load
15
Lead temperature
1.5mm from case for 10 seconds
300
°C
Cooling
Free Air Convection
Short circuit protection
Continuous, Automatic recovery
Case material
Aluminium Alloy
No-load power consumption
0.2
W
Isolation voltage
Tested for1 minute and 1mA max
1500
VDC
Isolation resistance
Test at 500VDC
1000
M
Ω
Isolation Capacitance
Input/output
100
pF
MTBF
1000
K hours
Weight
15
g
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. If the actual load is less than the specified minimum load, the output ripple may increase
sharply while its efficiency and reliability will reduce greatly. 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
All the WRA_YMD-3W & WRB_YMD-3W Series have been tested according to the following
recommended testing circuit before leaving factory. This series should be tested under load
(see Figure 1).
If you want to further decrease the input/output ripple, you can increase capacitance properly
or choose capacitors with low ESR. 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:
5V&12V
100
μF
24V&48V
10
μF-47μF
Cout: 10
μF/100mA
Input current
While using unstable power source, please ensure the output voltage and ripple voltage do
not exceed indexes of the converter. The preceding power source must be able to provide for
converter sufficient starting current Ip (Figure 2). General: Ip
≤1.4*Iin-max
No parallel connection or plug and play
DC
DC
Vin
GND
+Vout
0V
Cin
Vin
GND
+Vout
0V
C in
DC
DC
-Vout
Single Output
(Figure 1)
Input Voltage (V)
Input Voltage
Range
Ip
Output External Capacitor Table(Table 1)
Single Vout
(VDC)
Cout
(uF)
Dual Vout
(VDC)
Cout
(uF)
3.3
2200
±5
680
5
1000
±9
470
9
680
±12
330
12
470
±15
220
15
330
-
-
24
220
-
-


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