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Single-stage power factor correction LED accurate constant current driving circuit

A technology of power factor correction and constant current drive, applied in electric lamp circuit arrangement, electric light source, lighting device, etc., can solve the problems of large output current fluctuation, not long life, large size, etc., to achieve constant output current and low cost , to ensure the effect of power factor and low harmonic current control

Inactive Publication Date: 2014-09-03
XIJING UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] The current LED drive power supply is often costly, large in size, not long enough in life, large in output current fluctuations, high in THD, efficiency and power factor need to be improved, and safety and reliability can be further improved

Method used

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  • Single-stage power factor correction LED accurate constant current driving circuit

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with the accompanying drawings.

[0012] A single-stage power factor correction LED accurate constant current drive circuit, including a passive RC discharge circuit, an EMI filter circuit, a rectification filter circuit, an active attenuation circuit, a switch control circuit, a DC conversion filter circuit, and a passive RC discharge circuit Connect the input of the EMI filter circuit, the output of the EMI filter circuit to the input of the rectification filter circuit, the output of the rectification filter circuit to the input of the active depletion circuit, the output of the active depletion circuit to the input of the switch control circuit, and the output of the switch control circuit to the DC conversion filter circuit.

[0013]With reference to accompanying drawing, described passive RC discharge circuit comprises resistance R1, resistance R2, resistance R27, resistance R28, electric capacity...

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Abstract

Disclosed is a single-stage power factor correction LED accurate constant current driving circuit. The single-stage power factor correction LED accurate constant current driving circuit comprises a passive RC discharge circuit, an EMI filter circuit, a rectification filter circuit, an active attenuation circuit, a switch control circuit and a DC conversion filter circuit. The passive RC discharge circuit is connected with the input of the EMI filter circuit, the output of the EMI filter circuit is connected with the input of the rectification filter circuit, the output of the rectification filter circuit is connected with the input of the active attenuation circuit, the output of the active attenuation circuit is connected with the input of the switch control circuit, and the output of the switch control circuit is connected with the DC conversion filter circuit. The single-stage power factor correction LED accurate constant current driving circuit has the advantages of high efficiency, high power factor, constant output currents, quite low THD, long life, improved and compact functions, safe and reliable operation, convenient use and low cost.

Description

technical field [0001] The invention relates to the technical field of LED drive circuits, in particular to a single-stage power factor correction LED accurate constant current drive circuit. Background technique [0002] As a new energy-saving and environment-friendly light source, LED has the advantages of high brightness, low power consumption and long life, and is widely used in various fields. Using high-efficiency LED lighting, you can save a lot of energy. In China alone, according to government estimates, if one-third of the lighting market switches to LED products, they will save 100 million kilowatt-hours of electricity per year and reduce 29 million tons of carbon dioxide emissions. [0003] The current LED drive power supply is often costly, large in size, not long enough in life, large in output current fluctuations, high in THD, efficiency and power factor need to be improved, and safety and reliability can be further improved. Contents of the invention [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
Inventor 蔡红专耿清凯
Owner XIJING UNIV
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