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

A dimmer, traditional technology, applied in the direction of light source, electric light source, electric lamp circuit layout, etc., can solve the problems of immature products, narrow dimming range, dimming flicker, etc., and achieve good dimming effect, high luminous efficiency, soft light effect
CN103369802AInactive Publication Date: 2013-10-23叶鸣
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
叶鸣
Publication Date
2013-10-23
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

Claims

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