NMR Series
Isolated 1W Single Output DC/DC Converters
KDC_NMR.F01 Page 7 of 10
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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
NMR100C 10 82103C 11R103C 4.7
NMR101C 47 82473C 11R473C 1
NMR102C 47 82473C 11R473C 1
NMR106C 10 82103C 11R103C 4.7
NMR107C 47 82473C 11R473C 1
NMR108C 47 82473C 11R473C 1
NMR112C 10 82103C 11R103C 4.7
NMR113C 47 82473C 11R473C 1
NMR114C 47 82473C 11R473C 1
NMR118C 10 82103C 11R103C 4.7
NMR119C 47 82473C 11R473C 1
NMR120C 47 82473C 11R473C 1
NMR100PC 22 82223C 11R223C 1
