BUCK converter and control method therefor

BUCK converter and control method therefor

  • CN 106,374,748 A
  • Filed: 10/09/2016
  • Published: 02/01/2017
  • Est. Priority Date: 10/09/2016
  • Status: Active Application
First Claim
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1. a kind of buck converter, comprising:

  • First switch pipe and second switch pipe, are connected between input voltage and ground;

    Output inductor and output filter capacitor, be connected to the junction point of described first switch pipe and described second switch pipe withBetween ground, wherein, the voltage between two pole plates of described output filter capacitor is the output voltage of described buck converter;

    WithAndControl device, is configured toDescribed output voltage is sampled, to generate output voltage sampled signal,It is less than reference voltage in described output voltage sampled signal and flow through the inductive current of described output inductor and be decreased toLower threshold or less than described lower threshold when, control described second switch pipe become an OFF state from conducting state and controlDescribed first switch pipe is changed into conducting state from off state, andWhen described inductive current increases to upper limit threshold, described first switch pipe is controlled to become an OFF state simultaneously from conducting stateDescribed second switch pipe is controlled to be changed into conducting state from off state.

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