Control method, power control method and power-supply controller of electric

Control method, power control method and power-supply controller of electric

  • CN 102,263,398 B
  • Filed: 05/31/2010
  • Issued: 05/04/2016
  • Est. Priority Date: 05/31/2010
  • Status: Active Grant
First Claim
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1. a control method, is applicable to a power supply unit, and it includes a switch and an inductance unitPart, the method includes:

  • The flow through inductive current of this inductance element of detection;

    According to a feedback signal, make this power supply unit operate in normal state or the overload of carrying;

    In the time that this normally carries state, a current peak of this inductance element that makes to flow through is not more than certain value, andThe operating frequency that makes this switch is a first frequency;

    In the time of this overload, a current peak of this inductance element that makes to flow through is about this definite value, and makes thisThe operating frequency of switch is a second frequency, and this second frequency is higher than this first frequency;

    Calculate the duration of this power supply unit in this overload;

    AndThis duration, while exceeding an allowed time, stops this inductive current;

    Wherein, this allowed time is not changed by this operating frequency and affects, and this power supply unit by this justDuring a normal year state enters this overload, the operating frequency of this switch rises by first frequency is linear.

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