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Control method and control circuit of switching circuit and switching circuit

A switching circuit and control circuit technology, applied in the field of control circuits, switching circuits, and control methods of switching circuits, can solve the problems of inability to achieve fixed frequency and fast transient response, and achieve system stability, fast response, and simple control methods. Effect

Pending Publication Date: 2020-06-12
JOULWATT TECH INC LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, the object of the present invention is to provide a control method for a switch circuit, a control circuit and a switch circuit to solve the problem that the frequency cannot be fixed and the transient response is fast in the prior art

Method used

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  • Control method and control circuit of switching circuit and switching circuit
  • Control method and control circuit of switching circuit and switching circuit
  • Control method and control circuit of switching circuit and switching circuit

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Embodiment Construction

[0031] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any alternatives, modifications, equivalent methods and schemes made within the spirit and scope of the present invention.

[0032] In order to provide the public with a thorough understanding of the present invention, specific details are set forth in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details.

[0033] In the following paragraphs the invention is described more specifically by way of example with reference to the accompanying drawings. It should be noted that all the drawings are in simplified form and use inaccurate scales, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of t...

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Abstract

The invention discloses a control method and a control circuit of a switching circuit and the switching circuit. The control method comprises the following steps: setting an upper control threshold voltage and a lower control threshold voltage; wherein the upper control threshold voltage is the difference between the compensation voltage and the first slope, and controls the peak value of the inductive current of the switching circuit; the lower control threshold voltage being the sum of the compensation voltage and the second slope, and controlling the valley value of the inductive current ofthe switching circuit. The method is stable, and the response speed is high.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a control method for a switch circuit, a control circuit and a switch circuit. Background technique [0002] In the switching power supply, higher and higher requirements are put forward for the transient response of the power supply. For example, the central processing unit CPU needs a fast response to sudden load changes. At present, the commonly used control method with faster transient response is BANG-BANG control. The specific control method is to generate the upper limit and lower limit of the command value of the inductor current through the compensation voltage. When the main switch is turned on, the sampling value of the inductor current reaches the value of the inductor current. The upper limit of the command value, the main switch is turned off, and when the sampling value of the inductor current reaches the lower limit of the command value of the inductor c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/00H02M1/08
CPCH02M1/00H02M1/08H02M1/0003
Inventor 徐爱民周逊伟
Owner JOULWATT TECH INC LTD
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