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B1203S-1WR2 Datasheet(PDF) 4 Page - MORNSUN Science& Technology Ltd.

Part # B1203S-1WR2
Description  1W, Fixed input voltage, isolated & unregulated single output
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Manufacturer  MORNSUN [MORNSUN Science& Technology Ltd.]
Direct Link  http://www.mornsun-power.com
Logo MORNSUN - MORNSUN Science& Technology Ltd.

B1203S-1WR2 Datasheet(HTML) 4 Page - MORNSUN Science& Technology Ltd.

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DC/DC Converter
B_S-1WR2 & B_D-1WR2 series
2018.04.13-B/1
Page 4 of 6
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
Design Reference
1. Typical application circuit
If it is required to further reduce input and output ripple, a filter capacitor may be connected to the input and output terminals, see Fig.3.
Moreover, choosing a suitable filter capacitor is very important, start-up problems may be caused if the capacitance is too large. Under the
condition of safe and reliable operation, the recommended capacitive load values are shown in Table 1.
Vin
GND
+Vo
0V
DC
Cin
DC
Cout
Fig.3
Recommended capacitive load value table (Table 1)
Vin(VDC)
Cin(µF)
Vo (VDC)
Cout(µF)
3.3/5
4.7
3.3/5
10
12
2.2
9
4.7
15
2.2
12
2.2
24
1
15
1
--
--
24
0.47
2. EMC solution-recommended circuit
Vin
GND
+Vo
0V
DC/DC
LOAD
LDM
C1
Vin
GND
C2
Fig. 4
Input voltage (VDC)
3.3/5/12/15/24
EMI
C1
4.7µF /50V
C2
Refer to the Cout in Fig.3
LDM
6.8µH
3. Output load requirements
In order to ensure the converter can work reliably with high efficiency, the minimum load should not less than 10% rated load when it is used.
If the needed power is indeed small, please parallel a resistor on the output side ( The sum of the efficient power and resistor consumption
power is not less than 10%).
4. For more information please find DC-DC converter application notes on www.mornsun-power.com


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