Digital coding alternating current LED driving circuit

Abstract

The invention discloses a digital coding alternating current LED driving circuit, and belongs to the technical field of an alternating current LED driving circuit. According to the basic scheme, the digital coding alternating current LED driving circuit comprises an alternating current input circuit, a rectifying circuit, at least two sets of LED light strings, at least two electronic switches, a current adjustment circuit and a control circuit, wherein the LED light strings are electrically connected with the current adjustment circuit in series in sequence, each electronic switch is electrically connected with each set of LED light string in parallel, the number of LED lights of a later LED light string of the LED light strings connected in series is two times that of the LED lights of a former LED light string, and the coding output end of the control circuit is electrically connected with the control end of each set of LED light string. The digital coding alternating current LED driving circuit is small and exquisite in size. As no electrolytic capacitor exists in the circuit, the service life of the circuit exceeds that of an LED lamp, the efficiency of the circuit is high, and the PF value of alternating current is high.

Description

technical field [0001] The invention relates to an AC LED driving circuit, in particular to an LED driving circuit which utilizes a digital coded AC control circuit to drive an LED lamp. Background technique [0002] With the enhancement of global environmental protection awareness, the application of green and environmentally friendly light sources will become more and more popular in countries all over the world, especially in developed countries and regions. A typical representative of them is LED technology. LED is a high-efficiency, energy-saving, A green and environment-friendly light source with a long luminous life is of great significance for protecting the environment, saving energy, and protecting human health. With the continuous development and maturity of LED lighting technology, it will be widely used in various lighting fields and become the first choice for lighting tools in the future. [0003] At present, the main obstacle for LED lighting technology to b...

AI Technical Summary

Problems solved by technology

[0006] Generally speaking, since the input of the AC-DC converter (AC-DC) has rectification and filter capacitors, the PF (power factor) value of the AC is very low, generally around 0.6-0.8, the harmonic interference is large, and the AC-DC conversion The efficiency of the converter (AC-DC) is low, generally around 0.8; there is also an electrolytic capacitor on the AC-DC converter (AC-DC), the life of the electrolytic capacitor is far lower than the life of the LED, often the LED is not broken and the AC The life of the DC converter (AC-DC) has reached the end, causing a lot of waste; the cost of the AC-DC converter (AC-DC) is high, the structure is complex, and the volume is large

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