Find Efficiency of a Buck Converter

crutschow

Joined Mar 14, 2008
24,062
Below is the LTspice simulation of a simple buck converter that goes from 5V to 500mV.
Note that the average output current is about 133mA while the average diode current is about 97mA.

upload_2019-10-14_14-25-25.pngupload_2019-10-14_14-21-26.png
 

ci139

Joined Jul 11, 2016
1,088
some formulas related #4 topology . . .
. . . it is still complicated - but possible to match required duty for .5V , 50A by last 3 formulas @ fig.2
- - - -
as it turns out "0"-use - it still goes to that "Diode - dilemma" as in #18
or then not --
IMAX-2b.gif
-- because of the erroneous definition of duty in #18
SMPS - Experiment- chk-2b.png
 

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