| Abstract |
In this paper, a study about the effect of some parasitic
elements of switch mode DC-DC converters operating in steadystate
regime is presented, as well as an analysis about the
consequences of aging of electrolytic capacitors used in the output
filter.
The aging of electrolytic capacitors, used for smoothing the output
voltage manifests by the increase of their equivalent series
resistance (ESR), which increases the output voltage ripple. A
method for attenuating this effect is proposed.
Although the transistor resistance (RS) decrease the efficiency, it
can contribute for decreasing the inductor ripple current, which
reduces the effect of saturation in the inductor, the stress in the
semiconductors, as well as the output voltage ripple.
Several theoretical, simulated and experimental results are
presented, for a buck type DC-DC converter operating in the
continuous conduction mode (CCM). |
