Buck, boost and buck-boost regulate DC voltage using inductor switching.
Buck: V_o=DV_in; boost: V_o=V_in/(1-D); buck-boost: V_o=-DV_in/(1-D). Continuous vs discontinuous conduction. Inductor and capacitor sizing set ripple. Isolated forms: flyback, forward, LLC.
A 12 V to 5 V buck at D=0.42.
Buck, boost and buck-boost converters change DC voltage efficiently, which is how batteries and solar panels deliver the right voltage to loads.
Buck, boost and buck-boost regulate DC voltage using inductor switching.
Buck, boost and buck-boost converters change DC voltage efficiently, which is how batteries and solar panels deliver the right voltage to loads.
It switches a transistor so the inductor and capacitor average the voltage, with the output proportional to the duty cycle.
When the input is lower than the required output, such as a battery supplying a higher-voltage circuit.
Typical applications include stepping a 24 V battery down to 5 V for electronics, boosting a single cell battery to 12 V for a lamp and regulating the voltage of a solar charger from varying panel output.
Study "Rectifiers" first (topic 88 of 106 in Electrical Engineering). It covers the groundwork this topic builds on.
Duty cycle D. Switching frequency 100 kHz+. Feedback compensation.
A 12 V to 5 V buck at D=0.42.
The next topic is "Inverters", which builds directly on this one.
It is classed as Advanced in Electrical Engineering (topic 89 of 106). It is an advanced topic. It assumes you are comfortable with the intermediate topics in Electrical Engineering.
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