Design method of LED (light-emitting diode) dimming driving switching power supply applied to various traditional dimmers

Abstract

The invention provides a design method of an LED (light-emitting diode) dimming driving switching power supply applied to various traditional dimmers. According to the design method, the LED driving power supply achieves the resistive load input-output characteristics similar to those of an incandescent light bulb, so that LED lights (semiconductor LEDs) can be well suitable for dimming of the traditional dimmers (including traditional dimmers adjusting the phases of conduction angles through leading edge phase cut and traditional dimmers adjusting the phases of conduction angles through trailing edge phase cut, wherein silicon controlled dimmers are dimmers adjusting the phases of conduction angles through leading edge phase cut) and be used in indoor places where the traditional dimmers are needed for dimming. The LED dimming driving switching power supply designed according to the design method provided by the invention comprises a dimmer starting circuit loop, a rectifying circuit, a phase detection and isolation circuit, a phase cut detection circuit, a power-factor correction circuit, a switching power supply circuit and an LED current control circuit.

Description

[0001] technical field [0002] The invention relates to an LED dimming device suitable for traditional dimmers (leading-edge conduction angle adjustment and trailing-edge adjustment conduction angle, silicon-controlled silicon dimmer is a kind of leading-edge conduction angle adjustment) Background technique [0003] In the existing technology, traditional tungsten filament bulbs are used with traditional dimmers (leading-edge and trailing-edge adjustable conduction angles, thyristor dimmers are one type of leading-edge adjustable conduction angles) Brightness adjustment, the connection method is as follows figure 1 , the principle of the leading edge dimmer is that on the input voltage sine wave of each half cycle of the mains, the front part is not allowed to conduct, thereby reducing the effective value of the supply voltage to control the power of the lamp, that is, to control the brightness of the lamp. [0004] The principle of the trailing edge dimmer is that on th...

AI Technical Summary

Problems solved by technology

[0007] LED lighting technology is an emerging industry. In traditional incandescent lighting applications, many traditional dimmers have been widely used, but Because the traditional incandescent lamp has the disadvantage of high energy consumption, it has been phased out and needs to be replaced by LED lamps. Therefore, in this application field, LED needs to be redesigned to match the use of traditional dimmers. In the past technology , some people have tried research, but there are defects such as immature products, narrow dimming range, and dimming flickering, which cannot be practically used generally. The present invention is a research to solve such problems, and overcomes the past technical deficiencies

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