Current detecting circuit, controlling circuit and power conversion circuit

a current detection and control circuit technology, applied in the field of circuit technology, can solve the problems that the power conversion circuit in the prior art generally does not possess the function of detecting output current, and achieve the effects of low cost, high reliability, and simple structur

Inactive Publication Date: 2014-01-16
SUNSUN LIGHTING CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention aims to provide a current detection circuit for a power conversion circuit to facilitate the detection of output current. The proposed circuit has the advantages of being reliable, simple in structure, and low-cost.

Problems solved by technology

However, a power conversion circuit in the prior art generally doesn't possess the function of detecting output current thereof.

Method used

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  • Current detecting circuit, controlling circuit and power conversion circuit
  • Current detecting circuit, controlling circuit and power conversion circuit
  • Current detecting circuit, controlling circuit and power conversion circuit

Examples

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Embodiment Construction

[0018]In order to make clearer the objects, technical solutions and advantages of the invention, the present invention will be explained below in detail with reference to the accompanying drawings and embodiments. It is to be understood that the following description of the embodiments is merely to explain the present invention and is no way intended to limit the invention.

[0019]The current detection circuit for a power conversion circuit provided by the embodiments of the present invention can be used to detect output current of the power conversion circuit, and the current detection circuit has the advantages of high reliable and simple structure.

[0020]Referring to FIG. 1, the inventive power conversion circuit includes a filter circuit 12, a rectification circuit 13 and a single stage power conversion circuit 14.

[0021]The filter circuit 12 is connected to a live wire L and a null line N of an external AC.

[0022]The rectification circuit 13 is connected to the external AC by the fi...

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Abstract

The present invention provides a current detection circuit, a controlling circuit using the current detection circuit and a power conversion circuit using the controlling circuit, the current detection circuit comprises a sample keeping circuit, a rising edge detection circuit, a falling edge detection circuit, a sequential controlling circuit, a synchronous detection circuit and a lowpass filter. The inventive current detection circuit for the power conversion circuit obtains signals of the output current by detecting loop current of the master switch and processing the loop current.

Description

BACKGROUND OF THE INVENTION[0001]1. Technical Field[0002]The present invention relates to circuit technology, and more particularly, to a current detection circuit, a controlling circuit and a power conversion circuit.[0003]2. Description of Related Art[0004]A power conversion circuit, such as an AC-DC conversion circuit, can be used to convert AC to DC to provide electricity to relative devices. However, a power conversion circuit in the prior art generally doesn't possess the function of detecting output current thereof.BRIEF SUMMARY OF THE INVENTION[0005]The object of the present invention is to provide a current detection circuit for a power conversion circuit in order to detect output current thereof, the current detection circuit has the advantages of high reliable, simple structure and low cost.[0006]The present invention adopts the following technical solutions to solve the technical problem: a current detection circuit for a power conversion circuit, wherein the current det...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): H02M7/217
CPCH02M7/217H02M3/158G01R19/0092H02M1/0009G01R19/22
InventorSUN, JIANNING
OwnerSUNSUN LIGHTING CHINA