7.2. Step-Up or Boost Converter
In Fig. 7.6(a) the power circuit of a boost converter is presented. Using the boost converter the output voltage, which is also a dc voltage, can take values of up to three times the dc input dc voltage. The minimum output voltage of the boost converter is equal to the input dc voltage. The key waveforms of the boost converter under continuous and discontinuous inductor current operation are shown in Figs. 7.7 and 7.8, respectively.
The operation of the boost converter is based on the following three modes:
Mode I (Inductor charging): This mode starts when a turn-on pulse is applied to the gate of semiconductor switch S which connects the input or boost inductor across the input dc source and energy is stored in the ...
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