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High efficiency thyristor dimming linear led drive circuit

A technology of LED driving and driving circuit, applied in the direction of light source, electric light source, electrical components, etc., can solve the problems of increasing cost, unable to meet the rigid indicators of light efficiency, and low efficiency of the whole machine.

Inactive Publication Date: 2019-03-19
SHANGHAI ZHANKONGBI ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The only problem with the current linear dimming solution is that the efficiency of the whole machine is generally low, which will inevitably require improving the heat dissipation conditions of the linear chip, increasing costs, and failing to meet some rigid indicators of light efficiency.

Method used

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  • High efficiency thyristor dimming linear led drive circuit
  • High efficiency thyristor dimming linear led drive circuit
  • High efficiency thyristor dimming linear led drive circuit

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0043] The high-efficiency thyristor dimming linear LED drive circuit includes: a thyristor dimmer, a rectifier bridge, a diode D, an LED load, a first drive circuit, a second drive circuit, a feedback loop and a first capacitor C1.

[0044] The rectifier bridge is composed of four diodes D1, D2, D3, D4. After the input AC voltage ACin passes through the thyristor dimmer, it is connected to the input terminal of the rectifier bridge. The input terminal of the rectifier bridge inputs the AC voltage ACin, and the output terminal is connected with the first drive circuit after being connected in series with the diode D and the LED load. The rectifier bridge is also connected to the public. The first capacitor C1 is connected in parallel with both ends of the LED load.

[0045] The first drive circuit modulates the output circuit of the LED load...

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Abstract

The present invention provides a high-efficiency thyristor dimming linear LED drive circuit, including, including, a thyristor dimmer, a rectifier bridge, a diode, an LED load, a first drive circuit, a second drive circuit, and a feedback loop; After the input AC voltage passes through the thyristor dimmer, it is connected to the input terminal of the rectifier bridge; after the output terminal of the rectifier bridge is connected in series with the diode and LED load, it is connected to the first drive circuit; the first drive circuit modulates the output circuit of the LED load ; The first drive circuit is connected to the second drive circuit through a feedback loop; the second drive circuit provides current to the thyristor dimmer; the second drive circuit has a first bias resistor and a second bias resistor; the feedback loop passes through the first The second drive circuit is connected with the output terminal of the rectifier bridge. The advantage is that by adjusting the control mode of the linear dimming scheme, the efficiency of the whole machine can be greatly improved.

Description

technical field [0001] The invention relates to a linear LED driving circuit, in particular to a high-efficiency thyristor dimming linear LED driving circuit. Background technique [0002] In recent years, high-brightness LED lighting is gradually replacing traditional light sources such as incandescent lamps and fluorescent lamps with the advantages of high luminous efficiency, long life, high reliability and no pollution. In some applications, it is desirable to be able to adjust the brightness of the lights under certain conditions in order to further save energy and provide comfortable lighting. Thyristor dimmers have been used in dimming lighting such as traditional incandescent lamps for a long time, and there is no need to change wiring, and the device cost is low. The performance and specifications of various brands of thyristor dimmers are not much different. [0003] Nowadays, due to the rapid development of LED lighting, the original tens of watts of incandescent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/40H05B45/10
Inventor 张义李应天张汀
Owner SHANGHAI ZHANKONGBI ELECTRONICS TECH
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