A kind of led drive circuit that supports thyristor dimming
A technology of LED drive and silicon dimming, applied in the direction of lamp circuit layout, light source, electric light source, etc., can solve the problems of low power factor, LED drive circuit does not have a full voltage working range, etc., achieve high power factor, wide application range Effect
Active Publication Date: 2018-06-05
SICHUAN SUNFOR LIGHT
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Problems solved by technology
Although this technical solution supports thyristor dimming and has a simple structure, its LED drive circuit does not have a full-voltage operating range, and its power factor is low, which has obvious defects in use.
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[0047] The present invention is illustrated below in conjunction with accompanying drawing. Figure 4 It is a circuit diagram of a preferred scheme of the LED driving circuit of the present invention. The LED drive circuit supporting thyristor dimming of the present invention includes: a thyristor dimmer TRIAC, an input protection unit, a rectification module 120 , a sampling module 130 , a control module 140 and a lighting module 160 . The rectification module 120 is used to supply power to the lighting module 160 . The thyristor dimmer TRIAC is arranged between the AC power input terminal and the input protection unit. The output end of the rectification module 120 is connected to the sampling module 130 and the lighting module 160 . The control module 140 is disposed between the sampling module 130 and the lighting module 160 . The lighting module 160 includes a plurality of LED modules, a plurality of constant current units and several high voltage diodes, wherein each ...
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The present invention relates to an LED drive circuit supporting thyristor dimming, which includes: a thyristor dimmer, an input protection unit, a rectification module, a sampling module, a control module and a lighting module, and the rectification module is used for power supply for the above lighting modules. The thyristor dimmer is arranged between the AC power input end and the input protection unit. The output end of the rectification module is connected to the sampling module and the lighting module, and the control module is arranged between the sampling module and the lighting module. The control module includes a plurality of switch units, and the lighting module includes a plurality of LED modules. The switch unit is connected to the output end of the sampling module and the lighting module, and the switch unit controls the series or parallel connection of the LED modules according to the voltage signal output by the sampling module. The LED driving circuit of the present invention supports thyristor dimming, is compatible with current lighting infrastructure, and has a wide range of applications.
Description
technical field [0001] The invention relates to an LED driving circuit, in particular to an LED driving circuit supporting thyristor dimming. Background technique [0002] As a new high-efficiency light source, LED is widely used in lighting in industrial, agricultural and commercial fields due to its advantages of long life, low energy consumption, energy saving and environmental protection. [0003] When LED is used as the light source of the lamp, the service time of the lamp not only depends on the LED, but also includes components such as the driving power supply. In the current application scheme, the bottleneck of the service time of LED lamps is still the power supply, often the service time of the power supply determines the service time of the LED lamps, and the service time of the power supply is largely limited by the electrolytic capacitor. life. [0004] In order to eliminate the limitation of power usage time on the length of LED lamps’ usage time, on the on...
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IPC IPC(8): H05B37/02
Inventor 李东明封正勇龙文涛杨冕
Owner SICHUAN SUNFOR LIGHT