Datasheet

NKA Series
Isolated Sub-Miniature 1W Dual Output DC/DC Converters
KDC_NKA.J02 Page 5 of 7
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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
NKA0303xC 10 82103C 11R103C 1uF
NKA0305xC 22 82223C 11R223C 2.2uF
NKA0309xC 47 82473C 11R473C 2.2uF
NKA0312xC 68 82683C 11R683C 3.3uF
NKA0315xC 470 82474C 11R474C 2.2uF
NKA0503xC 10 82103C 11R103C 1uF
NKA0505xC 22 82223C 11R223C 2.2uF
NKA0505xEC 22 82223C 11R223C 2.2uF
NKA0509xC 47 82473C 11R473C 2.2uF
NKA0512xC 150 82154C 11R154C 0.33uF
NKA0515xC 470 82474C 11R474C 2.2uF
NKA1205xC 22 82223C 11R223C 2.2uF
NKA1209xC 47 82473C 11R473C 2.2uF
NKA1212xC 150 82154C 11R154C 0.33uF
NKA1215xC 470 82474C 11R474C 2.2uF