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Hello everyone, in this lesson we will talk about the switching method in the power supply mode

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The circuit structure of the switch mode is the simplest, which consists of a switch tube or a conversion chip.

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The switch tube can be a MOS tube or a triode

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For example, the figure below is a power supply using a switching mode of a MOS tube.

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Its circuit structure is very simple

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As long as the MOS transistor Q181 meets the conduction condition,

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it can convert one 3V power supply to another 3V power supply

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The power supply mode of the conversion chip is more integrated

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In fact, the conversion chip is actually composed of switching tubes and some peripheral circuits.

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The way it works is also very simple

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As long as it has power supply and open signal, it can output voltage

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And its output voltage is equal to the input voltage

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Most of the circuits now use the switch mode of the conversion chip