LED intelligent digital constant-current source and control method

Abstract

The invention discloses an LED intelligent digital constant-current source and a control method. The constant-current source comprises a low-pass filter circuit, a primary rectification circuit, an active adjustment circuit and an electronic switch, wherein the output end of the electronic switch is connected with a high-frequency transformer, a secondary rectification circuit and a smooth filter circuit, the output end of the smooth filter circuit is connected with a load and a sampling output circuit, the output end of the sampling output circuit is connected with a comparer, the input end of the comparer is also connected with a reference voltage circuit and a CPU time setting and light-dimming circuit, the output end of the comparer is connected with an error amplification circuit, a pulse width modulation circuit and a pulse driving circuit, and the output end of the pulse driving circuit is connected with the other input end of the high-frequency transformer. The LED intelligent digital constant-current source can realize the continuous stepless light dimming on the load and has the advantages of energy saving, environmental protection and ideal use effect. As the LED intelligent digital constant-current source and the control method, the invention is widely applied to illumination.

Description

Technical field [0001] The invention relates to a constant current source and a control method, in particular to an LED intelligent digital constant current source and a control method. Background technique [0002] Traditional street lamp controller products are mainly brightness uncontrollable. Generally, they can only be controlled in three levels to turn on, half on or off. Most street lamp controllers also need manual switch control or remote control. The degree of automation is low. A perfect street light control strategy not only wastes power resources, but also has poor lighting effects. Summary of the invention [0003] In order to solve the above technical problems, the purpose of the present invention is to provide an energy-saving and environmentally friendly LED digital constant current source. [0004] Another object of the present invention is to provide an energy-saving, optimized and efficient LED digital constant current source control method. [0005] The technica...

AI Technical Summary

Problems solved by technology

[0002] Traditional street lamp controller products are mainly uncontrollable in brightness. Generally, they can only be divided into three levels to control street lamps to be fully bright, half bright or extinguished. Moreover, most street lamp controllers need manual switch control or remote control. The degree of automation is low. There is no A perfect street light control strategy not only wastes power resources, but also has poor street lighting effects

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