What does a buck-
boost converter do? The main objective of a
buck-
boost converter is to receive an input DC
voltage and output a different level of DC
voltage, either lowering or boosting the
voltage as required by the application.
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In PV applications, generally, a Buck converter is used to charge the battery (since the output from a Buck converter is supposed to be less than its input), while a Boost converter is used to "match the load voltage" from the (supposedly) low voltage PV input.Oct 16, 2017
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Working principle
A Buck-Boost converter transforms a positive DC voltage at the input to a negative DC voltage at the output. The circuit operation depends on the conduction state of the MOSFET: On-state: The current through the inductor increases and the diode is in blocking state.
