Application Guide
Ripple Removal Capability
We measured ripple voltage by oscilloscope for output capacitor change on the
typical chopper type DC-DC converter. (described below)
V OUT =5V, I OUT =0.5A
f=100kHz
Oscilloscope
Electronic
Load
L
V IN =
12V
SW IC
D
C
Specimen
Comparison Between
and Other Capacitors with Same Capacitance
Low Impedance Aluminum Capacitor
16V100uF ( φ 6.3x11L)
Δ V=156mV
Low ESR Tantalum Capacitor
16V100uF (7.3x4.3x2.9)
Δ V=76mV
FPCAP
16V100uF ( φ 8x11.5L)
Δ V=58mV
Examination of Same Level Residual Ripple Voltage
To obtain same level of ripple voltage to FPCAP , Low Impedance Aluminum capacitor needs 16V3300uF,
even Low ESR tantalum capacitor needs 4 pcs. of same capacitance.
Low Impedance Aluminum Capacitor
16V3300uF ( φ 16x25L)
Δ V=60mV
Low ESR Tantalum Capacitor
16V100uF (7.3x4.3x2.9) X4 pcs.
Δ V=59mV
56
NICHICON CORPORATION / FPCAP ELECTRONICS (SUZHOU) CO., LTD.
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