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Switching Frequency ($f_s$)

The rate at which the power switches (MOSFETs, IGBTs) cycle between ON and OFF states. It dictates the ripple frequency and the size of passive components. fs=1/Tsf_s = 1/T_s.
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The statement of the theorem

Define the switching period TsT_s as the inverse of the switching frequency fsf_s. The relationship is given by:\nfs=1Ts=1Ton+Tofff_s = \frac{1}{T_s} = \frac{1}{T_{on} + T_{off}}