Chopper method

A method that controls and outputs the input voltage by turning a semiconductor switch on and off. While controlling the direction of current with a diode, energy is stored in the inductor during the switch-on period and released to the output during the off period. This name is derived from the fact that voltage and current are controlled by chopping them with a semiconductor switch. There are 3 types: boost converters, buck converters, and buck-boost converters. An example of a buck converter is extracting a lower DC 5V from a DC 12V battery voltage. An example of a boost converter is the step-up converter used in hybrid and electric vehicles. A buck-boost converter can produce an output voltage with opposite polarity to the input voltage, and is used, for example, to generate negative voltage for memory ICs.