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Buck-Boost Converter
V
_{in_min}
/ V
V
_{in_max}
/ V
V
_{in}
/ V
for the calculations
V
_{out}
/ V
I
_{out}
/ A
f / kHz
L / H
ΔI
_{L}
/ A
for V
_{in_min}
Proposal
The values of all input fields can be changed.
The proposed value for
L
is chosen so that
ΔI
_{L}
=0,4·I
_{out}
for
>V
_{in_max}
.
Tip:
The larger the value
L
, the smaller
ΔI
_{L}
, however this results in a larger physical size of
L
.
Tip:
The higher the switching frequency
f
, the smaller the inductor
L
.
Tip:
The lowest value of
L
is achieved if the converter works at the border between continuous and discontinuous mode for
V
_{in_min}
.
Tip:
The higher the frequency
f
and the smaller the inductor
L
, the higher the transistor losses.
By
Dr. Heinz Schmidt-Walter
, Holger Wenzel, Thomas Zänker, Richard Morgan and Johnalan Kegan.