DC/DC Converter

E_S-1WR2 & F_S-1WR2 series

2015.09.21-B/0

Page 4 of 5

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Design Reference

1. Typical application

If it is required to further reduce input and output ripple, a filter capacitor can be connected to the input and output terminals, see Fig.3.

Moreover, choosing suitable filter capacitor is very important , start-up problems may be caused by too large capacitance. To ensured the

modules running well, the recommended capacitive load values as shown in Table 1.

Vin

GND

+Vo

0V

DC

Cin

DC

Cout

Cout

-Vo

Dual Output

Single Output

Vin

GND

+Vo

0V

DC

Cin

DC

Cout

Fig.3

Recommended capacitive load value table (Table 1)

Vin

(VDC)

Cin

(µF)

Slngle

output

(VDC)

Cout

(

Dual

output

(VDC)

Cout

(

3.3/5

4.7

3.3/5/9

10

±3.3/±5

4.7

9/12

2.2

12

2.2

±9/±12

1

15

2.2

15/24

1

±15/±24

0.47

24

1

--

--

--

--

2. EMC typical recommended circuit (CLASS B)

Vin

GND

+Vo

-Vo

(0V)

DC/DC

LOAD

LDM

C1

Vin

GND

C2

Fig. 4

Input voltage(VDC)

3.3/5/9/12/15/24

EMI

C1

4.7µF /50V

C2

Refer to the Cout in Fig.3

LDM

6.8µH

Note: It is not needed to add the component in the peripheral circuit when

parameter with the symbol of "--"

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 t the output side ( The sum of the efficient power and resistor

consumption power is not less than 10%).

4. For more information please find the application notes on www.mornsun-power.com