Converter name

Nature

Efficiency symbols and typical values

Reversibility

Converter #1

DC/DC, Buck or Boost, (Boost in our case)

Irreversible

Converter #2

DC/AC

η20 when PWM inverter

η2r when PWM rectifier

Reversible

Converter #3

DC/DC Buck, often with HF transformer

Irreversible

Converter #4

DC/DC, Buck in system #3

η4bk when Buck

η4bs when Boost

Irreversible

Buck-boost in system #2

Reversible

Converter #5

AC/DC + PFC

Irreversible