DC/DC Converter

G_S-1WR2 & H_S-1WR2 Series

2016.11.02-A/3

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.

The simplest device for output voltage regulation, over-voltage and over-current protection is a linear voltage regulator with overheat

protection that is connected to the input or output end in series (see Fig. 4).

S in g l e

V in

G N D

+Vo

0 V

D C

C in

D C

C ou t

D u a l

V in

G N D

+Vo

0 V

D C

C in

D C

C out

C ou t

-Vo

Fig. 3

Single

Vin

GND

0V

+Vo

DC DC

REG

REG

Vin

GND

0V

+Vo

DC DC

-Vo

REG

REG

REG

Dual

Fig. 4

Recommended capacitive load value table (Table 1)

Vin

(VDC)

Cin

(µF)

Single

Vout

(VDC)

Cout

(µF)

Dual

Vout

(VDC)

Cout

(µF)

3.3/5

10

3.3/5

10

±5

4.7

12/15

4.7

12

2.2

±9

2.2

24

2.2

15

1

±12/±15

1

2. EMC typical recommended circuit (CLASS B)

Vin

GND

+Vo

-Vo

(

)

0V

DC/DC

LOAD

LDM

C1

C2

C3

Vin

GND

Fig. 5

Recommended typical circuit parameters:

Input voltage (V)

3.3/5/12/15/24

EMI

C1,C2

4.7µF /50V

C3

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 the application notes on www.mornsun-power.com