Mode transition of power stage circuit for switching capacitor converter, power stage circuit, integrate circuit and gate driving circuit thereof

Abstract

A power stage circuit includes a first phase switch circuit, a second phase switch circuit, a driving control circuit, a zero current detection circuit and a mode selection circuit. The first phase switch circuit is configured to be coupled to the second phase switch circuit via a first flying capacitor. The zero current detection circuit is configured to generate a first zero crossing signal indicating whether the first output current is essentially zero, and generate a second zero crossing signal indicating whether the second output current is essentially zero. The mode selection circuit is configured to trigger a phase replicate mode in response to the second zero crossing signal and the first phase control signal. During the phase replicate mode, the second phase control signal transitions to a high logic level before the first output current decreases to essentially zero.

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