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RT2-S20D1WR Series

RSG Electronic Components

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

C in

DC

C out

Fig.3

Recommended capacitive load value table (Table 1)

Vin(VDC)

Cin(µF)

Vo (VDC)

Cout(µF)

5

4.7

3.3

10

12

2.2

5

10

15

2.2

9

4.7

24

1

12

2.2

--

--

15

1

--

--

24

0.47

2. EMC solution-recommended circuit

Vin

GND

+Vo

0V

DC/ DC

LOAD

LDM

C1

CY

Vin

GND

C3

C2

Fig. 4

Input voltage (VDC)

5/12/15

24

EMI

C1

4.7µF /50V

C2

4.7µF /50V

C3

Refer to the Cout in Fig.3

CY

--

1nF/2KV

LDM

6.8µH

Notes: 1. 24V input series, 24V output series is subject to CY (CY :

1nF/2KV).

2. It is not needed to add the component in the peripheral

circuit when

parameter with the symbol of "--".

3. Output load requirements

When using, the minimum load of the module output should not be less than 10% of the nominal load. In order to meet the performance

parameters of this datasheet, please connect a 10% dummy load in parallel at the output end, the dummy load is generally a resistor, Please

note that the resistor needs to be used in derating.

DC/DC-Converter

2W fixed input voltage

isolated & regulated single output

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