Project: Analysis and Design of a Buck
Converter.
Given the following specification: An Input
voltage of 15V«Vin 20V and output of
Vout=10V over a load range of 5W<Pout<200W.
Switching frequency is fsw=500kHz.
a) Plot the configuration of the circuit. Design
the inductor (L) and capacitor (C). The current
ripple AiL should be below 5% of the average
inductor IL at the maximum load. The steady
state ripple AVout is below 0.5% of the steady
state value of the output voltage.
b) Determine the rate values for switch, diode
and capacitor. Search and determine a
manufacturer part number for the switch, diode
and capacitor.
c) According to values of on-state voltage drop
of diode VDon an on-state voltage drop of
switch VTon, compute the efficiency of your
circuit at heavy load conditions,
d) Analytically determine and draw the expected
current and voltage waveforms for each
component in your circuit at both light and
heavy load.
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