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Control circuit and totem pole PFC topology circuit

A technology for controlling circuits and topological circuits, applied in electrical components, output power conversion devices, etc., can solve problems such as current inversion, and achieve the effect of solving current inversion.

Pending Publication Date: 2022-07-15
广东高斯宝电气技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a control circuit and a totem pole PFC topology circuit, aiming to solve the problem of current backflow when the inductor current crosses zero

Method used

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  • Control circuit and totem pole PFC topology circuit
  • Control circuit and totem pole PFC topology circuit
  • Control circuit and totem pole PFC topology circuit

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Embodiment Construction

[0040] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0041] image 3 A control circuit provided by an embodiment of the present invention is shown, including a voltage acquisition unit 301 and a signal output unit 302;

[0042] The voltage acquisition unit 301 is connected to the target detection unit 300 and the signal output unit 302 respectively, and is used for sampling the current signal flowing through the target detection unit 300, and sends the sampled voltage signal and the built-in reference voltage signal obtained by sampling to the signal output unit 302;

[0043]The signal output unit 302, connected to the controlled unit 303,...

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Abstract

The invention is suitable for the field of circuit design, and provides a control circuit and a totem-pole PFC topological circuit, the control circuit comprises a voltage acquisition unit and a signal output unit, the voltage acquisition unit is used for sampling a current signal flowing through a target detection unit, and the signal output unit is used for outputting the sampled current signal; a sampling voltage signal obtained through sampling and a built-in reference voltage signal are sent to the signal output unit, the signal output unit is used for comparing the sampling voltage signal with the reference voltage signal, when the sampling voltage signal is larger than the reference voltage signal, a first control signal is output to the controlled unit, and when the sampling voltage signal is smaller than the reference voltage signal, a second control signal is output to the controlled unit; and outputting the second control signal to the controlled unit. According to the embodiment of the invention, the switching-on or switching-off of the switch of the PFC topology circuit is controlled according to the sampling voltage signal and the reference voltage signal, so that the problem of current backward flowing when the inductive current crosses zero can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of circuit design, and in particular relates to a control circuit and a totem pole PFC topology circuit. Background technique [0002] Electric energy is one of the most widely used high-quality energy sources so far. It is because of the application of electric energy that human beings can enter today's developed industrialized and information technology society. With the development of the times, electric energy has reached a high level in manufacturing, transmission and application. In order to utilize electric energy more efficiently, we still need to overcome many problems. From the birth to the development of power electronic technology, it affects the way people use electric energy all the time. While it benefits us, it also brings the problems of harmonics and reactive power. Harmonic problems and reactive power problems are the urgent problems that people face today when power electronic equipment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/42H02M1/08
CPCH02M1/4208H02M1/08
Inventor 龙冬冬
Owner 广东高斯宝电气技术有限公司
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