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Recently, the V2 type of constant on-time control has been widely used to improve light-load efficiency. In V2 implementation, the nonlinear PWM modulator is much more complicated than usual, since not only is the inductor current information fed back to the modulator, but the capacitor voltage ripple information is also fed back to the modulator. Generally speaking, there is no sub-harmonic oscillation...
This paper presents a novel method for optimal selection of passive components of current controlled SEPIC dc-dc switching regulators, aimed at preventing converterpsilas current loop instability. The source of current loop instability is a couple of complex right half plane zeros of open loop duty-to-output transfer function. The stability is achieved by identifying real inductors and capacitors...
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