The buck–boost converter is a type of DC-to-DC converter that has an output voltage magnitude that is either greater than or less than the input voltage magnitude.
Buck-boost converters are mainly used in regulated DC power supplies, where a negative polarity output may be required with respect to the common terminal of the input voltage, and the output voltage can be either higher or lower than the input voltage. The block diagram will help you make the right choice from a wide range of recommended products.
Principle of Operation:
Fig shows The two operating states of a buck–boost converter: When the switch is turned-on, the input voltage source supplies current to the inductor, and the capacitor supplies current to the resistor (output load). When the switch is opened, the inductor supplies current to the load via the diode D.
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