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Inductive current AC component reconstruction circuit, control circuit and switch circuit

A technology of inductive current and AC components, applied in the direction of adjusting electrical variables, control/regulating systems, converting DC power input into DC power output, etc., can solve the problems of high sampling circuit requirements and complex control, and achieve good transient response, The control circuit is simple and the effect of avoiding influence

Active Publication Date: 2018-03-06
JOULWATT TECH INC LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the purpose of the present invention is to provide an inductor current AC component reconstruction circuit, control circuit and switch circuit to solve the need to sample the inductor current in the prior art, which has high requirements for the sampling circuit and needs to be added Hidden Circuits, Controlling Complex Problems

Method used

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  • Inductive current AC component reconstruction circuit, control circuit and switch circuit
  • Inductive current AC component reconstruction circuit, control circuit and switch circuit
  • Inductive current AC component reconstruction circuit, control circuit and switch circuit

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Embodiment Construction

[0046] 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.

[0047] 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, without which the description of these details can be fully understood by those skilled in the art.

[0048] 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 a simplified form and use imprecise scales, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present in...

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Abstract

The invention discloses an inductive current AC component reconstruction circuit, a control circuit and a switch circuit. The inductive current AC component reconstruction circuit comprises an integral circuit and a biasing regulation circuit, wherein a first input end of the integral circuit is used for receiving a signal expressing a switch node voltage, the integral circuit is used for performing integration on difference between a voltage of the first input end and a biasing voltage, an output voltage of the integral circuit contains information expressing an inductive current AC component, and the biasing regulation circuit is used for adjusting DC biasing of the output voltage of the integral circuit to a first voltage. By reconstructing the inductive current AC component, the outputis controlled, the circuit is good in transient response, an inductive current is not needed to be sampled, the influence of the switch process on the control circuit is prevented, and the control circuit is simpler.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to an inductance current AC component reconstruction circuit, a control circuit and a switch circuit. Background technique [0002] In the switching power supply, in order to improve the transient response of the switching power supply, the current mode is used for control. Compare the inductor current sampling value with the current threshold. In the peak current mode, when the inductor current sampling value is greater than the current threshold, the main switch is turned off; in the valley current mode, when the inductor current sampling value is smaller than the current threshold , the main switch is turned on. Therefore, in current mode, the inductor current needs to be sampled. Since the switching tube in the switching power supply is turned on, there is a reverse recovery when the freewheeling diode is turned off, so that there will be an overshoot on the inductor...

Claims

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Application Information

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IPC IPC(8): H02M1/00H02M3/158
CPCH02M1/00H02M3/158H02M3/1582H02M3/1588Y02B70/10
Inventor 徐爱民黄必亮周逊伟
Owner JOULWATT TECH INC LTD
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