i want to design a buck-boost dc-ac inverter
there is no difference ..
A Multi-Mode Four-Switch Buck-Boost DC/DC Converter
Conference Paper A Multi-Mode Four-Switch Buck-Boost DC/DC Converter
Regular buck-boost has 2 switches whereas 4-switch buck boost as the name suggests it has 4 switches. 4-switch buck boost is more famous because you can program the switches to operate in buck ( step down) and in boost mode ( step up) mode.
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