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Single-ended flyback constant current circuit for light-emitting diode (LED)

A technology of constant current circuit and single-ended flyback, which is applied in the field of circuits, can solve problems such as the gap in the overall technical level, and achieve the effect of improving the adjustment accuracy and the adjustment life

Inactive Publication Date: 2016-09-07
安徽亮亮电子科技有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] Although my country's lighting technology and equipment development have made considerable progress, and the large-scale and localization of lighting equipment has gradually matured, there is still a certain gap between the overall technical level of my country's lighting and foreign countries.

Method used

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  • Single-ended flyback constant current circuit for light-emitting diode (LED)

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Embodiment Construction

[0015] The present invention will be further elaborated below in conjunction with the accompanying drawings.

[0016] see figure 1 , a single-ended flyback constant current circuit for LED, including: EMC and surge current suppression circuit, rectification filter circuit, single-ended flyback DC / DC power converter, and constant current, constant voltage output circuit , the constant current, constant voltage output circuit is connected to the two electrodes of the LED array, the signal acquisition circuit and the protection circuit are connected between the constant current, constant voltage output circuit and the single-ended flyback DC / DC power converter, and the signal acquisition circuit The extracted voltage fluctuation signal controls the output of the single-ended flyback DC / DC power converter after passing through the protection circuit, so that the constant current and constant voltage output circuit outputs stable voltage and current; the protection circuit adopts a...

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Abstract

The present invention provides a single-ended flyback constant current circuit for a light-emitting diode (LED). The constant current circuit includes an electromagnetic compatibility (EMC) and surge current suppression circuit, a rectifier filter circuit, a single-ended flyback DC / DC power converter, and a constant current constant voltage output circuit. Through adoption of the single-ended flyback constant current circuit for the LED, an adjustment service life of the LED lamp can be prolonged effectively, further, an adjustment accuracy of the LED is greatly improved, and fine adjustments such as lamp brightness adjustment can be carried out in a smaller range.

Description

technical field [0001] The invention relates to the field of circuits, in particular to a single-end flyback constant current circuit for LEDs. Background technique [0002] With the rapid development of the lighting industry, the requirements for lighting safety performance are getting higher and higher, and lighting appliances are national compulsory safety certification products. [0003] According to the current status of the lighting industry, if enterprises want to find new profit growth points, they must establish their own technology research and development institutions, enhance independent innovation capabilities, and strive to develop new technologies and new lighting products to enter the domestic and foreign medium and high-end markets. On the one hand, strengthen international cooperation. The world's lighting industry has a history of more than ten years, and has accumulated countless mature technologies and management experience. If we introduce and absorb f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/37Y02B20/30
Inventor 汪祖平张志华汪海源曹发生何群张志勇胡千保陈绍全万民韦兴标
Owner 安徽亮亮电子科技有限公司
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