CRE1 Series

Isolated 1W Single Output Isolated DC-DC Converters

KDC_CRE1.E01 Page 6 of 17

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APPLICATION NOTES (Continued)

Output Ripple Reduction

By using the values of inductance and capacitance stated, the output ripple at the rated load is lowered to 5mV p-p max.

Component selection

Capacitor: It is required that the ESR (Equivalent Series Resistance) should be as low as possible, ceramic types are recommended.

The voltage rating should be at least twice (except for 15V output), the rated output voltage of the DC-DC converter.

Inductor: The rated current of the inductor should not be less than that of the output of the DC-DC converter. At the rated current, the DC resistance of the inductor

should be such that the voltage drop across the inductor is <2% of the rated voltage of the DC-DC converter. The SRF (Self Resonant Frequency) should be

>20MHz.

DC

DC

L

C

Load

Power

Source

Inductor

Capacitor

L, μH

SMD

Through Hole

C, μF

CRE1S0505DC

CRE1S0505SC

CRE1S0515SC

CRE1S1205SC

CRE1S1212SC

CRE1S2405SC

CRE1S2412SC

CRE1S0305S3C

CRE1S0505S3C

CRE1S0505MC

47

82473C

11R473C

4.7

CRE1S0505MEC

10

82103C

11R103C

4.7